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Gas Sensor O2

efficient photonic solutions

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Gas Sensor O2

Electro-Chemical Gas Sensor

This O2 sensor is a compact and cost-effective gas sensor module based upon the electro-che-

mical measurement of oxygen concentration. The sensor is factory calibrated for a concentration

range of 0% to 10% or 0% to 25% oxygen. Its galvanic cell uses a weak acid electrolyte.

The sensor’s unique chemistry offers superior performance over a conventional oxygen sensor

and is unaffected by acid gases such as CO2, CO and NOx.

The sensor module is characterized by a low power input, a large range of supply voltage and

an outstanding long lifetime of up to 8 years at 20.9% oxygen. For signal output a direct current

interface with output range of 0..20mA or 4..20mA is available.

The special mechanical design allows for stable and reproducible measurement of concentrations

well below ambient air concentrations down to zero.• Long lifetime of the sensor

• Low power input

• Application in industry and tradeFeaturesandbenefits

• Long lifetime: 1,500,000 O2-% hours

• Unaffected by acid gases including

CO, CO2, and NOx

• Safe, non-caustic electrolyte

• Low power input

• Stable signal

• Wide range of applications

Applications

• Emission testing

• Food storage monitoring

• Combustionefficiencyanalysis

• Gas blending

• Compost monitoring

System

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Technical Specifications

Measurement ranges 0-10 %Vol, 0-25 %Vol

Accuracy < ± 2% O2–indication over operating temperature range

< ± 1% O2–indication at constant temperature and pressure

(pressure and temperature transients may lead to higher

deviations)

Stability < 1% O2–indication over an 8 hour period at constant tempe-

rature pressure and humidity

Response time (T90) I< 15 seconds (at 23 ±2 °C)

(dependsonsampleflowrateandtemperature)

Operating temperature +5 °C to +40 °C (41 °F to 104 °F)

Storage temperature Maximum -15 °C to +50 °C (5 °F to 122 °F)

Optimal +5 °C to +25 °C (41 °F to 77 °F)

Pressure range 500 hPa to 1500 hPa

Pressure effect Sensor output to be proportional to partial pressure of oxygen

within ± 2% of O2–indication.

Reference pressure for calibration is 1013 hPa

Operating humidity 5% to 95% relative humidity (non-condensing)

Requiredsampleflow Minimal 3 cc/minute,

typical 100 cc/minute

(forhigherflowratesconsiderpressurechange)

Power supply 12 V to 30 V DC, typ. 24 V DC

Current consumption 15 ±3 mA (no-load / 0 mA on direct current interface)

Direct current interface

IEC 60381-1

4 mA to 20 mA or 0 mA to 20 mA

Service life 1,500,000 O2-% hours, (more than 8 years in air

(20.9% O2))

Dimensions Approx. 108 x 80 x 63 mm (w x l x h)

including standoff ports and gas connector ports

Weight Approx. 175 g

Gas connectors Screwedconnectorsforflexibletubes

(tube inside diameter 3 mm, outside diameter 5 mm)

Sensor internal gas volume Approx. 20 ml

Interferences No Effect: CO2, N2, Ar, CH4

Minor Effect: CI2, CFC’s, SO2, NH3, HCI, CO, H2S, NOx, H2

Moderate Effect: Isopropyl Alcohol, Hexane, CCI4

Severe Effect in high concentrations:

not recommended Sodium Hydroxide, Acetone*, MEK*

(* affects CPVC housing owf sensor)

Less than 2% of O2–indication in presence of

75% Nitrous oxide

5%Holothane,Isoflurone,Enflurone

6%Sevoflurane

15%Desflurane

10% Corbon Dioxide

70% Helium

Options/ Accessiores Customized housing

Display for indicating the oxygen concentration in O2 %Vol

Other Measurment range

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m-u-t AG

Am Marienhof 2

D-22880 Wedel

Germany

Tel. +49 4103 9308 - 0

Fax: +49 4103 9308 - 99

E-Mail: info@mut-group.com

Website: www.mut-group.com

Copyright m-u-t AG. The m-u-t logo is a registered trademark of m-u-t AG. All rights reserved. All company and product namesaretrademarksand/orregisteredtrademarksoftheirrespectiveowners.Features,pricing,availabilitiesandspecificationsare all subject to change without notice.

O2-

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Mounting Instructions

In general, there are no restrictions for installation of the sensor. However, for optimal perfor-

mance and life characteristics, it is recommended to mount the sensor in the orientation indicated

on the sensor module or in a horizontal position. This guideline should also be noted for storage

of the sensor module. Take precautions to prevent condensations within the sensor module or on

the printed circuit board.

The sensor is internally compensated for temperature changes. As the chemical sensor and the

temperature compensation circuitry may exhibit different time constants, temperature transients

may lead to higher deviations until the thermal equilibrium is reached.

Sensor modules are calibrated with dry N2-O2 balance gas at 23 ±2 °C for a nominal pressure of

1013 hPa. Other gases may affect the performance of the sensor module. Consider the effects of

pressure (altitude) and dilution by humidity when interpreting sensor signals.

A strong shock such as a drop or heavy vibrations may lead to internal damage of the sensor

element or the electronic of the sensor module, resulting in a malfunction of the sensor module.

Theveryweaksignalsofthesensorelementareamplifiedontheprintedcircuitboard.Verystrong

electromagneticfields,asproducede.g.bymotorsorpumpsincloseproximityofthesensorele-

ment or the lead wires to the board may lead to inaccurate output signals of the sensor module.

The sensor module is not designed, manufactured nor authorized for use in equipment intended

to support or sustain life or for fail-safe applications where a failure of the sensor module could

leadtopersonalinjury,death,explosion,fireorotherseriousdamage.Thebuyerofthesensor

module is responsible to assess and mitigate the risks which could result from the use of the sen-

sormoduleinhisspecificapplication.sormoduleinhisspecificapplication.

The Module is factory calibrated. During the life of the sensor the electrolyte is saturated with the

products of the chemical reaction and the output signal slowly decreases. Maintenance: The Mo-

dule should be checked regularly using one or more gases with known content of oxygen.

The module is intended to be integrated into customer equipment. The customer shall verify the

EMC requirements for his complete System.

Standards

IEC 60381-1 Analogue signals for process control systems; direct current signals

• DIN EN 61000-4-4 – Burst 1kV DC-Supply Lines / Control Lines

• DIN EN 61000-4-11 – Short Time Cutoff / Voltage Decrease

Dimensional drawing

• Observe precautions for handling electrostatic sensitive devices