NY'CD.N"T.HD~ LEVEL MEASUREMENT SOLUTIONS

MULTISENSE

LEVEL DETECTION FOR FOAM

Foam Detection Systems HYC-FD JR02/14

www.southforkinst.com

MULTISENSE RANGE

The MultiSense is a new type of level sensor which uses an array of small sensors built into one body. Each sensor acts as a separate micro-sensor which is used to measure the material adjacent to it. This allows very high accuracy and enables a number of separate parameters to be measured at the same time. The micro-sensors also act together in an array to give more information on the material and to detect interfaces between phases in the material, e.g. Liquid and foam or different liquids.

The system comprises a sensor and a controller. The sensor is entered into the material being measured e.g. fermenter or mixing vessel and is connected to the controlller by special cables. The system makes use of Hycontrol's proprietary IMA sensing technology to give fouling immunity and high precision.

The system is particularly designed to measure and control foam. The level control can be used to manage processes in which foam is unwanted but also those in which foam is a necessary part of the process.

FEATURES

• LIQUID AND FOAM LEVEL CONTROL IN ONE SENSOR

• FOAM LEVEL MEASUREMENTS ACCURATE OVER A WIDE RANGE

• LIQUID LEVEL MEASUREMENTS IGNORING FOAM

• FOAM MEASUREMENTS WITH WIDELY VARYING LIQUID LEVEL

• FED BATCH CONTROL

• MULTIPHASE SYSTEMS

• LIQUID HEIGHT AND VOLUME MEASUREMENTS

APPLICATIONS

FOOD FUELS&OILS PHARMACEUTICAL

WHY CHOOSE MULTISENSE?

OUR TOP 5 REASONS WHY. •.

CHEMICAL WATER & WASTE

1. Simultaneous Liquid & Foam measurement· Because of its unique construction, the MultiSense can accurately show levels of both foam & liquid ... just foam ... andjustliquid!

2. Unparalled Accuracy· The information provided by its (up to 24 mini-sensors) produces a highly accurate profile of the fluid content of the vessel.

3. Multiple Measurements - The MultiSense Controller collects and interprets a wealth of data providing measurements of height, volume, conductivity and the relative position offluids in the vessel.

4. Level Control ·Appropriate action can be set up to dispense measured doses or pump liquids. The controller will initiate the required response automatically, triggered by pre-set indicators.

5. Reliable & Hygienic -As with the whole Hycontrol foam range, the MultiSense is perfect for hygienic applications. Made of316 Stainless Steel and Peek. It can be sterilised and will operate attemperatures of 150°C

UNDERSTANDING MULTISENSE The individual sensors operate alone but also in a concerted way to build up a •picture" of the process. By working together each sensor can measure a horizontal disk of material around itself out to the vessel wall. This is not affected by other items in the vessel such as stirrer shafts.

Each sensor measures the impedance of the fluid under test by passing a small current through the material. Interfaces between layers in the fluid are sensed by the rate of change of impedance. Foam is recognized by contrast with the liquid below. In this way the thickness and position of a layer of foam can be determined. The whole measuring range of the system can be used for each sensor individually resulting in a very wide dynamic range. The data from all the sections is combined to give smooth continuous readings.

The small sensors are called ·sections" and can be specified in size for particular applications. The number of measuring sections varies from 5 to 24 depending on the length required and the resolution. Special sections at the top and bottom called terminators ensure that the top and bottom of the active range are flat and not curved. In addition a passive body and process fitting position the active part of the sensor in the desired range.

CONTROLLER OPTIONS

The sensor is connected to a MultiSense controller via a special cable (shown below). The controller must have a measuring channel for each measuring section in the sensor and can be supplied with 8, 16 or 24 channels. The controller displays the process variables on the front panel display and also transmits them via two 4-20mA outputs. There are also volt-free outputs to connect to pumps or valves for level control. Set points for liquid and foam level can be used in combination with the outputs to control the levels. Also alarms can be set for additional security with a combined alarm output.

There are two enclosure options for MultiSense. IP65 Wall Mount enclosure and an IP55 Panel Mount enclosure:

... IM.....J

WALL MOUNT

Standard version - Wall mounting with integral control interface .

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PANEL MOUNT

Panel mounted interface - with controller mounted remotely

INTERFACE DETECTION

It is important to understand how the interfaces are detected in order to correctly specify the sensor. Two phases cannot be discriminated on the same section. Once the top phase (e.g. foam) crosses a junction it can be detected.

1. Liquid surface is on the middle of the sections shown. In this case the controller will identify the surface as being on that section.

2. Foam develops on the surface but does not exceed past the top of the middle sections shown. The controller cannot discriminate between foam and liquid on the same section. In this case the system will not indicate foam is present.

3. Once foam extends to the next section is can be identified clearly. The system will now indicate foam is present. If the foam increases it will be measured very precisely.

SENSOR DESIGN

This diagram shows the layout of a typical 8 segment sensor. The standard head is rated to IP65 and includes a connector for the sensor cable. There is alternative version for autoclaving and a stainless version with a fixed cable for more hostile environments.

The sensor diameter can be 12mm for standard duty or 20mm for heavy duty and lengths longer than 1.5m. The number and length of each section can be chosen to give the active range andthe required resolution. If small layers of foam are to be measured on liquid then the sections around the liquid surface are made short.

The body length is set to get the active parts of the sensor into the required region. The body can be as long or short as required.

Section 1 is a special section and is used as a reference for the sensor and so is normally very short.

MATERIALS OF CONSTRUCTION

Body Section

Top terminator

Seciloo 8

Seciloo 7

Sectioo6

Seciloo 5

Sectioo 4

Sect100 3

SectJoo 2

Section 1

Bottom termn ator Minimum liQIJid level

MultiSense sensors are manufactured using highest quality 316 stainless steel and Peek 450G, for all wetted parts, which are both FDA approved materials. Construction to meet USP Class VI standard on request. Material certificates to EN 10204 3.1 B can be supplied if required. Alternatively 316 S 13 stainless steel (EN 1.4435) can be used if required for pharmaceutical applications. Various seals can be used depending on the application.

TECHNICAL DATA

THE PROBE ...

• IP66 Stainless Steel housing

• Probe Diameters 12mm or 20mm

• Probe Lengths from 250mm-6m

• Max Probe Temperature 200°c (Higher on request)

• Max Probe Pressure 25bar (Higher on request)

• Wide range of process connections screwed, flanged, sanitary and many others

• Seal materials Viton, Silicon, EPDM & Pertast

• Materials of construction 316L 0.4Um Ra standard finish & PEEK450G as standard

• Options for 904L Stainless Steel, Hastelloy C and PVDF

• Options for USP Class VI construction

• FDA approved materials

THE CONTROLLER ...

• 8, 16 or 24 Channel system

e IP65 Wall Mount Enclosure 260mm wx 215mm dx 230mm h

• IP55 Remote panel mount option 80mm x 80mm

• Power Supply 90-240V AC 1A or 24V DC

• Dual Analogue Outputs 4/20mA liquid level & 4/20mA foam level

• Level Control 'Volt-free' c/o contacts rated at 240V AC 2A

• Foam Control 'Volt-free' c/o contacts rated at 240V AC 2A

• LCD HMI

• Resolution +/- 0.2mm

• Conductivity range 2-100,000 Micro Siemens

• Reduced resolution at low conductivity

• Maximum separation between controller and probe is 1 Om

HYCONTROL LEVEL TECHNOLOGIES

(1) (2)

Product Range For Solids :- (3) (4) (5)

(1) TOR Radar For Solids

(2) Ultrasonic, 'Through Air'

(2) 2 Wire Ultrasonic Transmitter

(3) FMCW 2 Wire Radar (6)

(4) Continuous 'Servo' Level Indicator

(5) FMCW 2 Wire Radar (8)

(6) Capacitance Level Switch (9) (9)

(7) Vibrating Probe Level Switch

(8) Rotating Paddle Level switch

(9) Microwave Level Switch

(10) Doppler Flow Switch (10)

Product Range For Liquids :- (4)

(1) By-Pass Level Indicator With Radar (3) (5) (6)

(2) TOR Radar For Liquids (2)

(3) 2 Wire Ultrasonic Transmitter

(4) FMCW 'Hom' Radar 2 Wire

(5) Magnetic Float Switches (8)

(6) FMCW 2 Wire Radar (9) (10)

(7) Foam Level Switch (11)

(8) Capacitance Level Switch I

(9) RF Admittance Level Switch

(10) Side Mounting 316 SS Float Switch (11)

(11) Tuning Fork Level Switch

(11) Tuning Fork Level Switch

(12) Ultrasonics 'Through Wall' (12)

(13) Mini Magnetic Float Level Switch

Hycontrol Ltd, Larchwood House, Orchard Street, Redditch, Worcestershire, England, 898 7DP Tel: 01527 406800, Fax : 01527 406810,sales@hycontrol.com,www.hycontrol.com -