Conductivity Level Switches - Catalogue Section 1

CATALOGUE2013

Conductivity Level Switches and Probes

ELT 8 Level Switch

ELT 68C Level Switch

CON 1 Level Switch

ELT 680 Level Switch

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SECTION 1

Introduction to Conductivity Level Switching 2

Application of Conductivity Level Switching 7

ELT 8 Conductivity Level Switch - General Purpose 8

ELT 68 Conductivity Level Switch - General Purpose and Interface Detection 9

ELT 680 Conductivity Level Switch - General Purpose and Interface Detection - Din Rail Mount 10

CON 1 Conductivity Level Switch - General Purpose and Interface Detection - Digital 11

ELT 68C Conductivity Level Switch - General Purpose and Interface Detection - Self Contained 12

62 Series Conductivity Level Probes - Single and Multi-Rod Electrodes 13

69 Series Conductivity Level Probes - Light Duty - Specification and Dimensions 29

68 Series Conductivity Level Probes - Heavy Duty - Specification and Dimensions 45

ELT 68C Conductivity Level Switch - Specification and Dimensions 50

Gland Fittings for 69 Series Probes - Specification and Dimensions 52

Gland Fittings for 68 Series Probes - Specification and Dimensions 54

Conductivity Level Switches and Level Probes

Level Switches

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ConductivityIntroduction

The operation of this type of system, as the heading implies, relies on conductivity; that is the ability of a medium topermit the passage of an electrical current. Two basic rules apply in respect of making a probe circuit within a tank,pipe, or vessel containing conductive liquids.

If a suitable metal probe insulated from earth is installed in a metal tank, then filling the tank with such a medium wouldprovide a conductive circuit between the probe and tank wall. With suitable electronic circuitry this conductive circuit canbe utilised to control a relay to provide say alarm and control secondary functions, for instance pump or valve activation.All conductive level systems work on this basic principle.

If a suitable insulated probe with an additional earth reference electrode is installed in a non-metallic tank, then fillingthe tank with such a medium would provide a conductive circuit between the probe and reference electrode. With suitableelectronic circuitry this conductive circuit can be utilised to control a relay.

Conductivity of Different Mediums

The conductivity of a liquid may be expressed in microSiemens (µS), unlike resistance which is expressed in Ohms (W),sometimes the range of conductive type level controllers is given on specification sheets in Ohms.For example: 2500W is equal to 2.5kW

To convert to microSiemens this formula used would be; Conductivity (µS) = 1/R x 106 (Where R is In Ohms).Using this formula for the above example would give a conductivity range of: 400 to 40 µS.

The higher the number in Siemens, the more conductive the liquid so electric current will flow more easily.The lower the number in Siemens, the less conductive the liquid, and the more sensitive the controller needs to be todetect the liquid. With too low a number the medium becomes more of an insulator and it may not be possible to detectwith conductive type systems.

We give an Ohm resistance figure as it is easy to simulate (by variable resistor) at the level detector.

De-ionised, de-mineralised and distilled water may generally be considered insulators, not conductors.Trouble free detection of these liquids will require the use of Capacitive type systems. If in doubt, a sample should beobtained so that the conductivity level can be determined by measurement.

As different liquids have differing conductivities, a choice of level detectors with varying ranges is produced to meetdiffering requirements.For example-mains or well water (raw or potable waters), generally have low conductivity (100-600 µS).

ELT8/68 level detectors could be used as their sensitivity range is wide enough to detect these low levels of conductivity.

Beer, Lager, Milk, and Fruit Juices have a medium to high conductivity (1250-8000 µS), level detectors ELT8/68, ELT680or CON1 would be suitable for these liquids.

It is particularly important that the correct range of instrument is selected as in some cases tracking can occur acrossthe insulator causing a false signal.

This is particularly important where probes are side mounted in the vessel, or are fitted into pipelines is CIP (CleaningIn Place) detergents for example: caustic solutions, gravy, food mixtures and colouring can have very high conductiv-ities typically 7000 - 30,000 µS. At these high levels of conductivity a very real probability exists that tracking across theprobe electrode insulator could occur due to the residual liquid film remaining on the insulator as bulk levels drop.Level detectors ELT8/68, ELT680 and ELT68C have specially selected working ranges to operate in these conditionsand the links or adjustments should be made to take this into account.

Other factors affecting Conductivity

It can be seen that the conductivity of the liquid to be detected will generally determine the type of level detector unitrequired. However, conductivity can be affected by other factors, for instance.

The volume of liquid in the tank, vessel, or pipe in contact with the probe electrode.Probe surface area: Too small an area even with highly conductive liquids can cause erratic switching.Temperature fluctuations: Generally conductivity increases approximately linearly with temperature.

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Conductivity Introduction

Fail-Safe operation of Control units

Afriso Eurogauge level detection units have facilities for selecting high or low (maximum or minimum) fail-safe operation.This enables the internal relay to de-energise in the alarm condition (red alarm indicator on), without wiring changesproviding fail-safe operation in the event of power failure.

With most of the units we produce selecting the fail-safe switch is only possible by opening the instrument cover withthe supply disconnected or by unplugging the unit.

Probes for Conductive Level Detectors

Single electrode probes are most commonly used and are produced in two basic types:

Site wired within the probe head: These are designated as 69 series probes and are available with stub electrodes 50mmfor pipe mounting and 75mm for side/bottom of tank mounting, or as standard electrode types with a maximummanufactured length of 3000mm for tank top mounting.

P69 series sealed probes, in which the probe head is totally sealed with a silicone rubber encapsulate; these are virtuallymaintenance free even in applications where condensation would normally be a problem.

An integral two core 2 metre cable is fitted as standard, with longer lengths available to order.Stub and standard long rod electrodes are available, as for the 69 series probes.The maximum temperature and pressure ratings for both probe designs is +120°C and 3 bar (45 psi).

For arduous applications that involve higher temperatures or pressure ratings or for vacuum use, the P68 stub orstandard electrode probes should be used. Maximum ratings for the P68 probes are 220ºC/20 bar (300psi).

Multi-electrode P68 probes are available where mounting space is limited and may have two or three 3mm diameterplain electrodes up to 1200mm long; ideal for use where only a single tank boss is available (G1”).

For applications which allow, low cost 62 series probes can be used, the 9.5mm Æ. single electrode similar in design tothe 69 series or the 3mm diameter multi-rod electrodes being commonly used.

The 3mm multi-rod electrodes are supplied bare or powder coated and permit the use of an earth reference electrodewithin a tank manufactured from plastic or glass lined, these can be used in multi-electrode control/alarm applicationse.g. pump control with independent high and/or low level alarm requirements.

The G¾” or G1” PVC heads can accommodate up to 4 electrodes each to 1700mm long coated or 3000mm uncoated.

For longer lengths, or where required, flexible electrodes with weights can be supplied up to 100 metres long. Thesetypes of probes although economical to buy are not suited to hygienic food or beverage applications.

Probe Fittings

Type 69 and P69 probes are available with G½”, G1” or G1½” threaded connections, however G1” is now consideredthe standard on most applications, particularly where hygienic conditions are necessary.

All Afriso Eurogauge hygienic probe wetted parts are 1.4405 (316S31) stainless steel, with insulators manufactured fromfood quality virgin PTFE ®

Hygienic Glands

To ensure that the fitting of the probe Into the tank maintains a hygienic environment, we have designed a range ofhygienic gland fittings specifically for this purpose which must be used to ensure correct sealing with sanitaryconditions; This is particularly found in general food processing and pharmaceutical applications.

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ConductivityIntroduction

For probes with G½” fitting there are two hygienic glands available, these are now non-preferred due to the difficulty infitting or replacing the 'O' ring seal within the small diameter gland body.

The availability of hygienic glands has now largely replaced the use of bosses and sealing washers, resulting in aneconomic solution to eliminating potential problems with older methods of probe mounting and sealing.

Liquid to Liquid Interface Detection.

Up to now we have only considered the detection of the presence or absence of a conductive liquid at the sensingelectrode of the probe. However, this is often required to detect the presence of one conductive liquid and to ignoreanother conductive liquid; the latter must always have a lower conductivity.

We refer to this process as Interface Detection: Typical examples of this are: beer/foam, milk/foam, beer/water,milk/water, and caustic/water.

Practical examples are:Detecting beer level in storage tanks and ignoring foam on the surface of the beer and similarly in pipelines.Detecting the presence of milk in pipelines and ignoring the water: For example when flushing pipes in milk recoverysystems.

Detecting caustic (CIP) solutions and ignoring water: Ensuring that caustic is not sent to the waste drainage systemduring cleaning.

To obtain stable and reliable detection for this type of application requires a unit that can differentiate between twolevels of conductivity, for example a control that can detect the higher of the two levels and ignore the lower.

Such a unit should have a close switching differential and must be stable against supply voltage and ambienttemperature variations. Interface controllers ELT68, ELT680 and CON1 have been designed specifically for thisrequirement. The control is always set to switch at the higher conductivity and to reset on the lower conductivity.

Beer/foam Interface - unit is set to detect beer, (high conductivity) and ignore foam (low conductivity).

Beer/water Interface - unit is set to detect beer, (high conductivity) and ignore water (low conductivity).

Caustic/water - unit is set to detect caustic,(high conductivity) and ignore water (low conductivity).

Milk/foam Interface - unit is set to detect milk, (high conductivity) and ignore foam (low conductivity)

In general, the greater the difference between the conductivities, the easier it is to detect the interface.Aim for a ratio of approximately 2:1.

As the conductivity of the liquids will change with temperature, trip points should be set at the process temperature foroptimum performance.

In pipelines diffusion layers may cause problems if the level detector unit is set to too sensitive a trip point.For example - to detect only a slight dilution of beer or milk with water may not be possible.

A greater dilution may well be required before the unit will reset. This can be countered by increasing the probeelectrode sensing area.

Probe Type Description Part Number

69, P69 G½” 16mm (Insulator) Tank gland welded type 671200169W

69, P69 G1” 16mm (Insulator) Tank gland welded type 671200069W

69, P69 G½” 16mm (Insulator) 1.5” Tri-Clamp gland type 6700000405

68, P68, 88 G1” 25mm (Insulator) 2.0” Tri-Clamp gland type 6700000404

68, P68, 88 G1” 25mm (Insulator) Tank gland welded type 671200068W

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IntroductionConductivity

Tips for Applying Conductive Systems

Never use mineral insulated (MICC) cable to connect probes, the insulating material in the cable can absorb moisturecausing leakage.

Probe electrodes operate at a very low AC voltage and are safe to touch when powered up, with maximum voltagesoperating at 2-6Vac with negligible current flow.

To increase the tracking distance across the electrode insulation, for example in highly conductive liquids, or wherebottom mounted probes are used for low level detection, probes can have heat-shrunk FEP (a PTFE derivative) insulatedelectrodes, extending to almost the end of the electrode. (Being transparent this insulation may not be seen on a casualinspection).

If FEP insulation is fitted, ensure that there is 25mm bare electrode for optimum metal to liquid area contact.Use a separate electrode to provide earthing in plastic tanks, or where the tank is glass or plastic lined.

Where two valves, or pumps, are being controlled in one tank by two separate controllers, do not attempt to use acommon STOP probe connected to terminal E1 on both units; this will not work! Separate electrodes must be installed.

Remember that terminal E1 is always the high level probe in a pump or valve control set-up where latching is requiredbetween levels. E2 is always the low level latching probe.

In alarm only applications, terminal E1 is always connected to the probe, for low or high level applications, as terminalE2 is not used.

It is sometimes difficult to ascertain whether a liquid is conductive or not, so where there is doubt it will be necessaryto obtain samples for checking the conductivity level.

For example liquid sugar is essentially syrup, and is non-conducting. However, sugar in suspension in water is conductive.

Probe latching arrangements do not affect the chosen failsafe settings.Installation circuit diagrams always show the relay contacts in the supply off condition.Front panel scales will show a higher number as the sensitivity increases, i.e. the liquid will have lower conductivity.

The use of Conductive type probes within Hazardous Areas.

As the conductive type probes are simple devices i.e. having no electronic components or independent means ofgenerating energy, they can safely be used in Zone 0, 1, or 2 areas.

The level detector unit must always be mounted in a Safe Area with the probe connected through an approved andsuitable Zener Safety Barrier which is also mounted within the Safe Area.

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Introduction Conductivity

Afriso Eurogauge Level Detectors – Adjustment Ranges

20501001K5K 2K10K100K

ELT 68C Variable

ELT 680 High Sensitivity(linked for low range)

ELT 680 Low Sensitivity (linked for high range)

Spirits 40 – 70% ProofMains Water

Beer FOBMilk Foam

LemonadeBlackcurrent or Orange Cordial (Diluted 5 : 1)

Orange Cordial (Undiluted)Cola

Beer & Larger

Fresh Orange JuiceMilk

C.I.P. DetergentsGravy Mixtures

Ohms

Equivalent Resistance Simulation Across Electrode

Lower Conductivity Higher ConductivitymicroSiemens µS

33333200 10000100050010010

60K

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ELT 8 Variable (2.5K-4K-9K-15K-40K-60K Switch Points )

2.5K

400

30

20000

ELT 8 (68) Variable ( 30- 400-1K-1.5K-3K-5K Switch Points)

Comparison Chart – Conductivity Of Common Liquids

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ApplicationConductivity

Conductivity Level Switching Application Guide

Acetic Acid (0.3-70%), Acetamide, Ammonia (0.4-16%), Asphalt Emulsion,Butyric Acid (1-70%), Cadmium Bromide(1-43%), Cadmium Chloride(1-50%), Caustic Soda*, Chlorinated Ether, Citric Acid (20%), CoffeeExtract, Cola Syrup, Cream Cheese, Cupric Sulphate, Formic Acid(5-100%), Hydrochloric Acid (5-40%)**, Magnesium Chloride (5-34%),Nitric Acid (6.2-62%)**, Oxalic Acid, Potassium Chloride (5-21%), SodiumSilicate( 37-40%), Sulphuric Acid (5-99.4%)**, Titanium Dioxide, Urea, ZincChloride

*Check Caustic concentration as crystallisation may occur when probe electrode becomes uncovered.**Insulate probe electrode with FEP to avoid product tracking, Check probe material suitability withacid contact,

Acetic Acid (0.3-70%), Acetamide, Ammonia (0.4-16%), Asphalt Emulsion,Beer, Black Water, Butyric Acid (1-70%), Cadmium Bromide(1-43%),Cadmium Chloride(1-50%), Caustic Soda*, Chlorinated Ether, Citric Acid(20%), Coffee Extract, Cola Syrup, Corn Syrup, Cream Cheese, CupricSulphate, Dichlorohydrin, Formaldehyde, Formic Acid (5-100%), GreyWater, Hydrochloric Acid (5-40%)**, Ice Cream, Lead Nitrate (5-30%),Magnesium Chloride (5-34%), Milk, Nitric Acid (6.2-62%)**, Oxalic Acid,Potable Water, Potassium Chloride (5-21%), Raw Water, Sea Water,Sodium Silicate (46%), Spirits (40-70% proof), Sulphuric Acid (5-99.4%)**,Titanium Dioxide, Urea

*Check Caustic concentration as crystallisation may occur when probe electrode becomes uncovered.**Insulate probe electrode with FEP to avoid product tracking, Check probe material suitability withacid contact,

ConductivityRange in

microSiemensµS

Product to DetectControllerSelection

17to

400µS

200to

33333µS

10to

20000µS

Acetic Acid, Acetamide, Black Water, Carbonated Water, Calcium Chloride,Cadmium Sulphate (0.2%), Chlorinated Ether, Formaldehyde, Formic Acid(100%), Grey Water, Hydrochloric Acid (5-40%)**, Mercuric Chloride, NitricAcid (6.2-62%)**, Oxalic Acid, Phosphoric Acid (10-87%), Potable Water,Raw Water, Sea Water, Spirits (40-70% proof), Sulphuric Acid (5-99.4%)**,Toothpaste, Urea, Wine

**Insulate probe electrode with FEP to avoid product tracking, Check probe material suitability withacid contact,

Note:

Information shown is given in good faith.Use with caution, If in any doubt pleasecontact us for assistance

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Description

Specification

ConductivitySwitches

ELT 8 General Purpose ConductivityLevel Switch

The ELT 8 is designed for use with electrically conducting liquids such as water, sewageand can be used with either one sensing probe as a single point level switch to operate highor low level alarms etc, or with two sensing probes for the automatic starting and stoppingof pumps, etc.

The setting of the ELT 8 can be adjusted with the sensitivity (r) control to ensure that theunit switches at the correct level and is not affected by foam etc. on the liquid surface.

Model and Accessories Part Number Price

ELT 8 Controller - 230Vac 556008000-1



ELT 8 Controller - 24Vdc 556008230-4


Weatherproof Enclosure - IP65 741000100

Failsafe: Maximum - green LED on - relayenergised - probe uncovered.

Minimum - green LED on - relay energised - probe covered.

Hold Facility: Latch-on circuit between high and low level probes.

Temperature: -10°C ... 60°C

Housing: ABS case with polyester base.

Fixing: Base mounted by 2 x 4mm Æ holes for screws,

or optional clip mounting to symmetrical DIN rail.

Protection: IP40 (BS5940/IEC 529).

Cable Entry: 5 blind grommets : 2 x 15mm Æ knockouts in base

Supply: 110/230Vac (Selected by internal links) : 50/60Hz : 4VA. 24/48Vac factory fitted : 50/60Hz : 4VA. 24 Vdc : 2W

Sensitivity: Variable from 2.5kW to 60kW (400 S to 17 S).

Controls: Sensitivity (r) to set trip point (approximate).

Settings: 0 = 2.5kW (400 S). 1 = 4kW (250 S). 2 = 9kW (110 S). 3 = 15kW (67 S). 4 = 40kW (25 S). 5 = 60kW (17 S).

Output: DPCO contacts - Voltage free. 3A at 250Vac 750VA 1A at 12Vdc non inductive load

Indicators: LEDS - Green - normal operation - output relay energised.

Red - ‘alarm’ condition - output relay de-energised.

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Description

Specification

The ELT 68 is a conductivity level switch with a very low resistance range designed for usewith highly conducting liquids where dense foam on the liquid surface causes problems withgeneral purpose conductivity level switches.

Used with either one sensing probe as a single point level switch or two sensing probes forpump/solenoid control the ELT 68 is capable of differentiating between dense foam layersand the liquid surface meaning the unit is also suitable for interface detection between liquidswith different levels of conductivity.

Applications include interface detection in pipes between beer/water, milk/water,caustic/water, etc.

Conductivity Switches

ELT 68 General Purpose and InterfaceDetection Conductivity Level Switch

Model and Accessories Part Number Price




ELT 68 Controller - 24Vdc 556823000-4


Weatherproof Enclosure - IP65 741000100

Supply: 110/230Vac (Selected by internal links) : 50/60Hz : 4VA. 24/48Vac factory fitted : 50/60Hz : 4VA. 24 Vdc : 2W

Sensitivity: Variable from 30W to 5kW (33 S to 200 S).

Controls: Sensitivity (r) to set trip point (approximate).

Settings: 0 = 30W (33333 S). 1 = 400W (2.5 S). 2 = 1kW (1 S). 3 = 1k5W (667 S). 4 = 3kW (333 S). 5 = 5kW (200 S).

Output: DPCO contacts - Voltage free. 3A at 250Vac 750VA 1A at 12Vdc non inductive load

Indicators: LEDS - Green - normal operation - output relay energised.

Red - ‘alarm’ condition - output relay de-energised.



Hold Facility: Latch-on circuit between high and low level probes.


Housing: ABS case with polyester base.

Fixing: Base mounted by 2 x 4mm Æ holes for screws,

or optional clip mounting to symmetrical DIN rail.


Cable Entry: 5 blind grommets : 2 x 15mm Æ knockouts in base

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Description

Specification Hold Facility: Latch-on circuit between high and low level probes.


Housing: DIN-rail mounting enclosure with 12 screw terminals

Fixing: Clip mounting to symmetrical 35mm DIN rail.

Protection: IP 40 (BS5940/IEC 529).

Weight: Approximately 0.4kg including packing.

Size: 55 x 73 x 113mm

Supply: 110/230Vac (Selected by internal links) : 50/60Hz : 4VA. 24/48Vac Factory fitted :

50/60Hz : 4VA. 24Vdc : 2W

Sensitivity: Selected by links fitted to terminals on front panel. pre-set to Low (LR) range.

High Range (H):1kW to 100kW : Low Range (L): 50W to 2kW.

Controls: Sensitivity (r) to set trip point Timer (r) to set switching time

delay of 0-20 seconds.

Output Relay: SPCO contacts - Voltage free. 3A at 250Vac 750VA : 1A at 12Vdc non-inductive load.

Indicator: Green LED on - normaloperation - relay energised.




The ELT 680 is the DIN rail mount version of the ELT 68 conductivity level switch with a verylow resistance range designed for use with highly conducting liquids where dense foam onthe liquid surface causes problems with general purpose conductivity level switches.

Used with either one sensing probe as a single point level switch or two sensing probes forpump/solenoid control the ELT 680 is capable of differentiating between dense foam layersand the liquid surface meaning the unit is also suitable for interface detection between liquidswith different levels of conductivity.

Applications include interface detection in pipes between beer/water, milk/water,caustic/water, etc.

Model Part Number Price

ELT 680 Controller - 230Vac 568030120H-1



ELT 680 Controller - 24Vdc 568023020H-4


ELT 680 General Purpose and InterfaceDetection Conductivity Level Switch

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Description

Specification

SwitchesConductivity

Failsafe: Failsafe selection by front panel link, (factory pre-set to HL).

Hold: Latch-on circuit between highand low level probes


Housing: DIN-rail or back mounting with16 screw terminals


Weight: Approximately 0.4kg including packing.

Size: 77 x 75 x 114.5mm overall.

Supply: 85 - 265Vac - 50/60Hz - 4VA 24Vdc - (20 to 32Vdc) : 2.5W

Sensitivity: Sensitivity selection by front panel link. Pre-set to High (HR) range. High Range (H) : 1kW to 100kW, Low Range (L): 50W to 5kW

Controls: Pushbutton adjustment of Sensitivity (r) (set trip point)

Output: Single pole changeover contacts Voltage free.

Rating: 3A at 250Vac 750VA : 1A at 12Vdc non-inductive load.

Signal: 24Vdc (56W source resistance) in ‘normal’ condition, Open circuit in ‘alarm’ condition. Max switching current 50mA.

Indicator: Green LED on - normal condition - output relay energised. Red LED on - alarm condition - output relay de-energised.

The CON1 Conductivity Level Switch is a DIN-rail or back mounting general purposeconductivity level switch with a very wide adjustment range that is used to detect electricallyconducting liquids.

It can also be used where dense foam on liquid surface exists or an interface detectionbetween two liquids such as beer and water is required.

Special features of the unit include built in fail-safe selection and a 1 second delay onswitching to allow for liquid surface turbulence.

The unit can be used with either one or two probes (pump on/off).

CON1 General Purpose Wide RangeConductivity Level Switch


CON1 Level Switch CON11Z1

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Description

Specification Connection: 1" BSP st. steel T316 S31 (into stainless steel welding gland).

Protection: IP66 (BS 5490/IEC529).

Temperature: -10°C ... 100°C (120°C for short periods)

Pressure: 7 bar maximum.

Cable Entry: Pg11 gland.

Connections: Terminal 1: signal output.Terminal 2: 0V (earth).Terminal 3: +24V supply.

Weight: Approximately 1kg (dependent on electrode length).

Supply: 24Vdc (20-32 Vdc) : 2 W max.

Output: 0…24Vdc(56W source resistance)250mA max. switching current

(suitable for opto-isolators and reed relays).

Sensitivity: Variable from 30W to 5kW.

Controls: Potentiometer for sensitivity adjustment.

Failsafe: Selector switch for high (HL) or low level (LL)

Red alarm LED on - relayde-energised output low (0V).Green normal LED on -

relay energised - output high (+24Vdc).

The ELT68C is a self contained, all-in-one, conductivity level switch especially designed foruse with conducting liquids in dairies, breweries, ice cream plants, etc. and is capable ofdifferentiating between dense layers of foam and the actual liquid surface.

The adjustment range of the ELT68C renders the unit also capable of interface detectionbetween beer/water, milk/water, caustic/water, etc.

In standard form the unit is supplied with a PTFE partly insulated high grade stainless steelrod electrode, 1000mm in length, complete with associated hygienic welding gland.

A number of different probe configurations can be supplied to meet special conditions orrequirements, such as interface detection in pipes.


ELT 68C General Purpose and InterfaceDetection Conductivity Level Switch


ELT68C - to 1m (-1) , 2m (-2), 3m (-3) S531 111 10-1 (-2) (-3)

ELT68C - to 1m (-1) , 2m (-2), 3m (-3) FEp toProbe Tip

S531 131 10-1 (-2) (-3)

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ProbesConductivity

PRODUCT DESCRIPTION: 62 Series 2-Multi-Rod Conductivity Probe – G1.0” (BSP) Ø3.0mm Hastalloy ‘C’ Electrodes. Partly Insulated.

ISSUE: 1 PART NUMBER: 6272 10 1020 DATE: 05/2012 DRAWN BY: WBL

Process ConnectionBody G1.0”(BSP) Grey PVC

Cable Gland PG11 Plastic

2 x Probe Electrode Ø 3.0mm

Probe Cap Ø 50.8mm ABS Moulding10

820

.0

Min

imum

100m

m-M

axim

um80

0mm

Hastalloy ‘C’

General Specifications

Max. Working Temperature+50ºC

Max Working Pressure3 Bar

ProtectionIP65 (BS 4590/IEC 529)

MaterialsAs specified above

O ringNitrile

22.0

25.0

Araldite® Epoxy ResinEncapsulated

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Probes Conductivity

PRODUCT DESCRIPTION: 62 Series 3-Multi-Rod Conductivity Probe – G1.0” (BSP) Ø3.0mm Hastalloy ‘C’ Electrodes.Partly Insulated PVC body pg11 Cable Entry.





Probe Cap Ø 50.8mm ABS Moulding

108

20.0

Min

imum

100m

m-M

axim

um17

00m

m

Hastalloy ‘C’






O ringsNitrile

22.0

25.0


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15

ProbesConductivity

PRODUCT DESCRIPTION: 62 Series 4-Multi-Rod Conductivity Probe – G1.0” (BSP) Ø3.0mm Hastalloy ‘C’Electrodes. Partly InsulatedPVC body pg11 Cable Entry.






820

.0

Min

imum

100m

m-M

axim

um80

0mm

Hastalloy ‘C’






O ringsNitrile

22.0

25.0


1

16

Probes Conductivity





820

.0

Min

imum

100m

m-M

axim

um80

0mm

Hastalloy ‘C’






O.ringsNitrile

22.0

25.0


Probe ConnectionCable 5.0 Metres 2 x 0.5mm² Grey PVC

PRODUCT DESCRIPTION: 62 Series 2-Multi-Rod Conductivity Probe – G1.0” (BSP) Ø3.0mm Hastalloy ‘C’ Electrodes. Partly InsulatedPVC body Silicone Potted with 5 Metre Cable.

ISSUE: 1 PART NUMBER: 6272 10 1020P DATE: 05/2012 DRAWN BY: WBL

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ProbesConductivity

PRODUCT DESCRIPTION: 62 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm Electrode, Partly Insulated PVC pg11 Cable Entry




Probe Electrode Ø 9.50mm


820

.0

Min

imum

100m

m-M

axim

um30

00m

m

Stainless Steel1.4405(S316)






O ringsFKM

22.0

25.0

1

18

ConductivityProbes

PRODUCT DESCRIPTION: 62 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm ElectrodePartly Insulated PVC, M20 Threaded adaptor.



Cable Gland M20 Brass



820

.0

Min

imum

100m

m-M

axim

um30

00m

m







O ringsFKM

22.0

25.0

1

19

ProbesConductivity

PRODUCT DESCRIPTION: 62 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm ElectrodePartly Insulated PVC, FEP Insulated with M20 Brass threaded Adaptor.






820

.0

Min

imum

100m

m-M

axim

um30

00m

m







O ringsFKM

22.0

25.0

Heatshrink FEP (PTFE)Insulator

1

20

ConductivityProbes

PRODUCT DESCRIPTION: 62 Series 2-Multi-Rod Conductivity Probe – G1.0” (BSP) Ø3.0mm (Black) Epoxy powder coated Electrodes.Partly Insulated PVC body pg11 Cable Entry.






108

20.0

Min

imum

100m

m-M

axim

um17

00m

m







O ringsNitrile

22.0

25.0


(Black) Epoxy PowderCoat Finish

1

21

ProbesConductivity







820

.0

Min

imum

100m

m-M

axim

um30

00m

m







O ringsFKM

22.0

25.0



1

22

ConductivityProbes







108

20.0

Min

imum

100m

m-M

axim

um17

00m

m







O ringsNitrile

22.0

25.0



1

23

ProbesConductivity

PRODUCT DESCRIPTION: 62 Series 2-Multi-Rod Conductivity Probe – G¾” (BSP) Ø3.0mm (Black) Epoxy powder coated Electrodes.Partly Insulated PVC body pg11 Cable Entry


Process ConnectionBody G3/4”(BSP) Grey PVC




820

.0

Min

imum

100m

m-M

axim

um17

00m

m







O ringsNitrile

22.0

25.0



1

24

ConductivityProbes

PRODUCT DESCRIPTION: 62 Series 2-Multi-Rod Conductivity Probe – G¾” (BSP) Ø3.0mm (Black) Epoxy powder coated Electrodes.Partly Insulated PVC body with 7.5 Metre Cable.






108

20.0

Min

imum

100m

m-M

axim

um17

00m

m







O ringsNitrile

22.0

25.0




1

25

ProbesConductivity





820

.0

Min

imum

100m

m-M

axim

um30

00m

m







O ringsFKM

22.0

25.0


PRODUCT DESCRIPTION: 62 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm Electrode Partly Insulated PVC, FEPInsulated with M20 Brass threaded Adaptor.


1

26

ConductivityProbes

PRODUCT DESCRIPTION: 62 Series 4-Multi-Rod Conductivity Probe – G¾” (BSP) Ø3.0mm (Black) Epoxy powder coated Electrodes.Partly Insulated PVC body pg11 Cable Entry.


Process ConnectionBody G ¾”(BSP) Grey PVC




108

20.0

Min

imum

100m

m-M

axim

um17

00m

m







O ringsNitrile

22.0

25.0



1

27

ProbesConductivity

PRODUCT DESCRIPTION: 62 Series 3-Multi-Rod Conductivity Probe – G¾” (BSP) Ø3.0mm (Black) Epoxy powder coated Electrodes.Partly Insulated PVC body pg11 Cable Entry.


Process ConnectionBody G ¾”(BSP) Grey PVC




820

.0

Min

imum

100m

m-M

axim

um17

00m

m







O ringsNitrile

22.0

25.0



1

28

ConductivityProbes

PRODUCT DESCRIPTION: 62 Series 3-Multi-Rod Conductivity Probe – G¾” (BSP) Ø3.0mm (Black) Epoxy powder coated Electrodes.Partly Insulated PVC body with 7.5 Metre Cable.






108

20.0

Min

imum

100m

m-M

axim

um30

00m

m







O ringsNitrile

22.0

25.0



1

2


1

29

ProbesConductivity

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G½” (BSP) 50mm Stub Electrode Partly Insulated PTFE


Process ConnectionBody G½”(BSP) Stainless Steel

1.4405(S316)

Cable Gland PG11 Nickel Plated Brass

Electrode Insulator Ø 16.0mm Virgin PTFE®



.549

.07.

022

.0



Ambient Temperature-20º……+80ºC



ProtectionIP66

MaterialsAs Specified

O ringsFKM

50

19.0

1

30

ConductivityProbes

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G½” (BSP) 75mm Stub Electrode Partly Insulated PTFE


Process ConnectionBody G1/2”(BSP) Stainless Steel

1.4405(S316)





65.5

49.0

7.0

22.0

75.0

mm






ProtectionIP66


O ringsFKM

19.0

1

31

ProbesConductivity

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G½” (BSP) Ø9.50mm Electrode Partly Insulated PTFE.



1.4405(S316)





.545

.022

.0

Min

imum

100m

m-M

axim

um30

00m

m








O ringsFKM

19.0

1

32

ConductivityProbes

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G½ (BSP) Ø9.50mm Electrode Partly Insulated PTFE with FEP(PTFE) Covering.



1.4405(S316)





.545

.022

.0

Min

imum

100m

m-M

axim

um30

00m

m








O ringsFKM

19.0


10

1

33

ProbesConductivity

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G1.0” (BSP) 50mm Stub Electrode Partly Insulated PTFE.



1.4405(S316)





.549

.07.

022

.0






ProtectionIP66


O ringsFKM

50

19.0

1

34

ConductivityProbes

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G1.0” (BSP) 75mm Stub Electrode Partly Insulated PTFE.


Process ConnectionBody G1.0”(BSP) Stainless Steel

1.4405(S316)





65.5

49.0

7.0

22.0

75.0

mm






ProtectionIP66


O ringsFKM

19.0

1

35

ProbesConductivity

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm Electrode Partly Insulated PTFE.



1.4405(S316)





.545

.020

.0

Min

imum

100m

m-M

axim

um30

00m

m








O ringsFKM

19.0

1

36

ConductivityProbes

PRODUCT DESCRIPTION: 69 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm Electrode Partly Insulated PTFE withFEP (PTFE) Covering.


Process ConnectionBody G1.0" (BSP) Stainless Steel

1.4405(S316)





.545

.022

.0

Min

imum

100m

m-M

axim

um30

00m

m








O ringsFKM

19.0


10

1

37

ProbesConductivity

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G½” (BSP) 50mm Stub Electrode Partly Insulated PTFE.



Process ConnectionBody G½” (BSP) Stainless Steel

1.4405(S316)




Probe Cap Ø 50.8mm Makralon Moulding

2100

22.0

56.0

24.0

7.0

6.0

50

E1


2-Part Silicon RubberEncapsulated





ProtectionIP66


O ringsFKM

19.0

1

38

ConductivityProbes



1.4405(S316)





2100

22.0

56.0

49.0

7.0

6.0

75.0

mm

E1







ProtectionIP66


O ringsFKM

19.0

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G½” (BSP) 75mm Stub Electrode Partly Insulated PTFE.


1

39

ProbesConductivity

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G½” (BSP) Ø9.50mm Electrode Partly Insulated PTFE.




1.4405(S316)





2100

22.0

56.0

45.0

6.0

Min

imum

100m

m-M

axim

um30

00m

m

E1









O ringsFKM

19.0

1

40

ConductivityProbes

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G½” (BSP) Ø9.50mm Electrode Partly Insulated PTFE withFEP (PTFE) Covering.




1.4405(S316)





2100

22.0

56.0

45.0

6.0

Min

imum

100m

m-M

axim

um30

00m

m

E1









O ringsFKM

19.0


10

1

41

ProbesConductivity

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G1.0” (BSP) 50mm Stub Electrode Partly Insulated PTFE.




1.4405(S316)





2100

22.0

56.0

24.0

7.0

6.0

50

E1







ProtectionIP66


O ringsFKM

19.0

1

42

ConductivityProbes

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G1.0” (BSP) 75mm Stub Electrode Partly Insulated PTFE.




1.4405(S316)





2100

22.0

56.0

49.0

7.0

6.0

75.0

mm

E1







ProtectionIP66


O ringsFKM

19.0

1

43

ProbesConductivity

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm Electrode Partly Insulated PTFE.




1.4405(S316)





2100

22.0

56.0

45.0

6.0

Min

imum

100m

m-M

axim

um30

00m

m

E1









O ringsFKM

19.0

1

44

ConductivityProbes

PRODUCT DESCRIPTION: P69 Series Conductivity Probe – G1.0” (BSP) Ø9.50mm Electrode Partly Insulated PTFE withFEP (PTFE) Covering.




1.4405(S316)





2100

22.0

56.0

45.0

6.0

Min

imum

100m

m-M

axim

um30

00m

m

E1









O ringsFKM

19.0


10

1

45

ProbesConductivity



1.4405(S316)


Electrode Insulator Ø 25.0mmØ 19.0mm Virgin PTFE®


Probe Housing Ø 50.8mm Stainless Steel1.4305(S303)

22.0

2100

47.0

70.0

E1





Max. Working Temperature+220ºC at Electrode


Also suitable for VacuumProtection

IP66 (BS 4590/IEC 529)Materials

As specified aboveO.rings

FKM

29.0

Fixe

dw

orki

ngle

ngth

=75

mm

5.00

PRODUCT DESCRIPTION: P68 Series Heavy Duty Conductivity Probe – G1.0” (BSP)75mm long Stub type Electrode Partly Insulated PTFE with integral connection cable.


1

46

ConductivityProbes



1.4405(S316)





2100

2100

56.0

45.0

E1










FKM

45.0

Min

imum

Leng

th=

100m

mM

axim

umle

ngth

=30

00m

m

PRODUCT DESCRIPTION: P68 Series Heavy Duty Conductivity Probe – G1.0” (BSP)Ø9.50mm Electrode Partly Insulated PTFE with integral connection cable.


1

47

ProbesConductivity



1.4405(S316)



Probe Electrode x 2 Ø 3.0mm


2100

2100

56.0

15.0

E1 E2









O.ringsFKM

45.0

Stan

dard

Leng

thx

2=

800m

mM

axim

umle

ngth

=15

00m

m

Electrode Spacer Ø 20.0 x 3mm Virgin PTFE®

PRODUCT DESCRIPTION: P68 Series Multi-Rod Conductivity Probe – G1.0” (BSP)2 x 3.0mm Electrode Partly Insulated PTFE with integral connection cable.


1

48

ConductivityProbes

PRODUCT DESCRIPTION: P68 Series Multi-Rod Conductivity Probe – G1.0” (BSP)3 x 3.0mm Electrode Partly Insulated PTFE with integral connection cable.




1.4405(S316)



Probe Electrode x 3 Ø 3.0mm


2100

2100

56.0

15.0

E1 E2 E3









O.ringsFKM

45.0

Stan

dard

Leng

thx

3=

800m

mM

axim

umle

ngth

=15

00m

m

Electrode Spacer Ø 20.0 x 3mm Virgin PTFE®

1

49

ProbesConductivity



1.4405(S316)





2100

2100

56.0

45.0

E1










FKM

45.0

Min

imum

Leng

th=

100m

mM

axim

umle

ngth

=30

00m

m

Heatshrink FEP(PTFE)

Insulator

PRODUCT DESCRIPTION: P68 Series Heavy Duty Conductivity Probe – G1.0” (BSP)Ø9.50mm Electrode FEP Covered Partly Insulated PTFE with integral connection cable.


1

50

ConductivityProbes

PRODUCT DESCRIPTION: ELT68 Compact Conductivity Switching Probe – G1.0” (BSP) Ø8.00mm Electrode Partly Insulated PTFE.Lengths up to (-1) 1000mm (-2) 2000mm (-3) 3000mm

ISSUE: 1PART NUMBER: (-1) S53111110 -1 (-2) S53111110 -2 (-3) S53111110 -3Replaces original Part Number: 5468 01 102

DATE: 05/2012 DRAWN BY: WBL

Cable Gland M20 Nickel Plated Brass

80.0







O ringsFKM

Housing with lock downcover 105 x 80mm Aluminium Alloy Casting

with clear window

Process ConnectionBody

G1.0" (BSP)40mm A/C Flats


Probe Electrode Ø 8.00mm Stainless Steel1.4405(S316)

Conductivity SwitchingTransducer RCON10P1 Plug-In PCB Assembly


60.0

50.0

Min

imum

Leng

th10

0mm

Max

imum

leng

th30

00m

m


Supply: +20-32 Volts DC :2 Watts Max.

Output: 0...24Vdc (56 ohm source resistance)maximum switching current 250mA

Sensitivity: Variable from 30 ohm to 5k ohm

Controls and LED’s:Potentiometer (VR1) for sensitivity adjustment.Failsafe selector for High (HL) and Low (LL)Level applications.Red alarm LED on – Relay de-energised (0V)Green normal LED on – Relay energised (+24v)

1

51

ProbesConductivity

PRODUCT DESCRIPTION: ELT68 Compact Conductivity Switching Probe – G1.0” (BSP) Ø8.00mm Electrode Partly Insulated PTFE With FEP (PTFE) Covering .Lengths up to (-1) 1000mm (-2) 2000mm (-3) 3000mm

ISSUE: 1PART NUMBER: (-1) S53113110-1 (-2) S53113110-2 (-3) S53113110-3

Replaces original Part Number: 5468 01 102 + FEP CoveringDATE: 05/2012 DRAWN BY: WBL

Cable Gland M20 Nickel Plated Brass

80.0







O ringsFKM

Housing with lock downcover 105 x 80mm Aluminium Alloy Casting

with clear window

Process ConnectionBody

G1.0" (BSP)40mm A/C Flats


Probe Electrode Ø 8.00mm Stainless Steel1.4405(S316)

Conductivity SwitchingTransducer RCON10P1 Plug-In PCB Assembly


60.0

50.0

Min

imum

Leng

th10

0mm

Max

imum

leng

th30

00m

m


Supply: +20-32 Volts DC :2 Watts Max.

Output: 0...24Vdc (56 ohm source resistance)maximum switching current 250mA

Sensitivity: Variable from 30 ohm to 5k ohm

Controls and LED’s:Potentiometer (VR1) for sensitivity adjustment.Failsafe selector for High (HL) and Low (LL)Level applications.Red alarm LED on – Relay de-energised (0V)Green normal LED on – Relay energised (+24v)


1

52

ConductivityProbes

Ø 50.0mm

Ø 16.0mm Nitrile ( Food Quality) Gland Seal

FKM O.Ring BS128G1" BSP

Fillet Weld Point

1.44

05(S

316S

31)S

tain

less

Ste

el


Max. Working Temperature+100ºC Continuous

1 Hour Cleaning @ +130ºCMax Working Pressure

7 BarApplication

Suitable for use with all 69 and P69Series Conductivity Probes


O.ringsFKM

Gland Thrust Washer

Warning: The FKM O.Ring suppliedwith this assembly must always be

removed during the weldingprocess. This must not be replaced

until the welding process hassufficiently cooled.

PRODUCT DESCRIPTION: Process Connection Gland 50mm Welded Type Fitting G1.0” BSP (16mm bore) for 69 and P69type probes.

ISSUE: 1 PART NUMBER: 6712 000 69W DATE: 05/2012 DRAWN BY: WBL

1

53

ProbesConductivity

Ø 50.0mm

Ø 16.0mm Nitrile Gland Seal


Ø 38.0mm

1.44

05(S

316S

31)S

tain

less

Ste

el




7 BarApplication



O.ringsFKM

Fillet Weld Point

Gland Thrust Washer

Warning: The FKM O.Ring suppliedwith this assembly must always be

removed during the weldingprocess. This must not be replaced

until the welding process hassufficiently cooled.

PRODUCT DESCRIPTION: Process Connection Gland 1.5" Welded Type Fitting G1.0”BSP (16mm bore) for 69 and P69 type probes.

ISSUE:1 PART NUMBER: 6712 000 69W DATE: 05/

2012DRAWN BY:

WBL

PRODUCT DESCRIPTION: Process Connection Gland 38mm (Conical) Welded Type Fitting G1.0” BSP (16mmbore) for 69 and P69 type probes.


1

54

ConductivityProbes

Ø 50.0mm

Ø 25.0mm


Fillet Weld Point

1.44

05(S

316S

31)S

tain

less

Ste

el




7 BarApplication

Suitable for use with all 68 and 88Series Conductivity and

Capacitance ProbesMaterials

As SpecifiedO.rings

FKM

Viton O.Ring BS120

Warning: The FKM O.Ringssupplied with this assembly must

always be removed during thewelding process. These must not

be replaced until the weldingprocess has sufficiently cooled.

PRODUCT DESCRIPTION: Process Connection Gland 50mm Welded Type Fitting G1.0” BSP (25mm bore) for 68 and 88type probes.


1

55

ProbesConductivity

Ø 50.0mm

Ø 25.0mm


Fillet Weld

1.44

05(S

316S

31)S

tain

less

Ste

el




7 BarApplication

Suitable for use with 68 and 88Series Conductivity or Capacitance

ProbesMaterials

As SpecifiedO.rings

FKM

FKM O.Ring BS120

2" Tri-Clamp

Ø64

.0m

m

PRODUCT DESCRIPTION: Process Connection Gland 2.0" Sanitary Tri -Clamp Fitting G1.0” BSP (25mm bore) for68 and 88 type probes.


1

56

ConductivityProbes

Ø 50.0mm

Ø 16.0mm Nitrile Gland Seal


Ø 38.0mm

1.44

05(S

316S

31)S

tain

less

Ste

el




7 BarApplication



O.ringsFKM

Ø50.00 Flange diameter

34.0

mm Gland Thrust Washer

PRODUCT DESCRIPTION : Process Connection Gland 1.5" Sanitary Tri -Clamp Fitting G1.0” BSP (16mmbore) for 69 and P69 type probes.


IndexConductivity

P

Probe - 6272 141 020 20

Probe - 6272 141 230 21

Probe - 6272 141 240 22

Probe - 6277 141 220 23

Probe - 6277 141 22P 24

Probe - 6277 141 230 27

Probe - 6277 141 23P 28

Probe - 6277 142 000 25

Probe - 6277 145 240 26

Probe - 6812 200 01P 45

Probe - 6812 210 01P 46

Probe - 6812 240 02P 47

Probe - 6812 240 03P 48

Probe - 6812 410 00P 49

Probe - 6911 200 01P 38

Probe - 6911 200 51P 37

Probe - 6911 201 510 29

Probe - 6911 203 510 30

Probe - 6911 210 00P 39

Probe - 6911 211 000 31

Probe - 6911 410 00P 40

Probe - 6911 411 000 32

Probe - 6912 200 01P 42

Probe - 6912 200 51P 41

Probe - 6912 201 010 34

Probe - 6912 201 510 33

Probe - 6912 210 00P 43

Probe - 6912 211 000 35

Probe - 6912 410 00P 44

Probe - 6912 411 000 36

Probe Fittings 3

Probe Voltage 5

Probes for Conductive Level Detectors 3

Pump Control 5

R

RCON10P1 Conductivity Transducer 50, 51

S

Simple Devices 5

T

Tips for Applying Conductive Systems 4

Tracking Distance 2, 5

A

Adjustment Ranges - Level Switches 6

Application of Conductivity Level Switches & Probes 7

Assembly Warning FKM O Rings and Welding 52, 53,54

B

Beer/Foam Interface Detection 4

Beer/Water Interface Detection 4

C

Caustic/Water Interface Detection 4

Common STOP Probe 5

Comparison Chart - Common Conductive Liquids 6

CON1 Level Switch 11

Conductivity of Different Mediums 2

Controller Selection 7

D

Diffusion Layer in Pipelines 4

E

E1 Terminal 5

E2 Terminal 5

ELT 68 Level Switch 9


ELT 68C - S531 111 10-1/2/3 50

ELT 68C - S531 113 10-1/2/3 51

ELT 68C Level Switch 12


Equivalent Resistance 6

F

Factors Affecting Conductivity 2

Failsafe operation of Control Units 3

FEP - Heat Shrink Sleeve 5

Gland - Process Connection - 6700 000 404 55

Gland - Process Connection - 6700 000 405 56

Gland - Process Connection - 6712 000 68W 54



H

Hazardous Areas - Conductivity Probes 5

Hygenic Glands 3

I

Introduction to Conductivity Level Controls 2

L

Latching with Two Probes 5

Liquid to Liquid Interface Detection 4

M

MICC Cable 5

microSiemens 2, 7

Milk/Foam Interface Detection 4

O

Ohms 2, 7

P

Probe - 6272 101 020 13

Probe - 6272 101 020P 16

Probe - 6272 101 030 14

Probe - 6272 101 040 15

Probe - 6272 111 000 17

Probe - 6272 112 000 18

Probe - 6272 141 000 19

Measuring, control and monitoring devices for building, industry and environmental protection.

AFRISO EUROGAUGE LtdUnit 4The Satellite Business VillageFleming WayCrawleyWest SussexRH10 9NE

Tel: +44 (0) 1293 658360Fax: +44 (0) 1293 528270

[email protected]

Conductivity Level Switches - Catalogue Section 1

Documents

Transcript of Conductivity Level Switches - Catalogue Section 1