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Oxygen Measuring Module ZR5

General Information

For optimum quality and process protection, the avoidance of oxygen, also as traces, is necessary in many technological applications. Due to the increasing adoption of quality management systems (e.g. ISO 9000), a constant monitoring and documentation of quality parameters becomes more important. The oxygen measuring module ZR5 is based on the approved zirconia technology. It serves the continuous measurement of oxygen concentration in industry and laboratory gases and the monitoring of protective gases. Deviations of the oxygen concentration from set points can be signalized, the ZR5-module can monitor the procedure of special production processes under inert gas.


  • Protective gas monitoring in food processing, e.g. in packaging
  • Protective gas monitoring in technological processes, e.g. soldering, welding
  • Monitoring tasks in microelectronic manufactures
  • Monitoring of protective and inert gases in surface treatment processes

Technical Data Oxygen Measuring Module ZR5

Sensorpotentiometric zirconia cell
Range1 Vol.-ppm...100 Vol.-%, 10-15
Vol.-ppm...20.6 Vol.-%
Accuracyrel. error < 5 %
T90T90 ≤ 1 s (measuring cell without tube)
Housing19''-slot (21 TE)
Gas connectioninput: Swagelok 3 mm,
output: tube nipple 4 mm
Gas flow8 ± 2 l/h, controlled via internal pump 
(can be turned off)
Signal outputanalog: 0/4...20 mA for O2
(digital: RS 232 as option)
Power supply24 V DC (± 20 %)
DisplayLED for failure display only
Protection degreeIP20
Working conditions0...50 °C, max. 80 % rel. humidity
Storage conditions-20...60 °C, max. 95 % rel. humidity
Dimensions (W x H x D)100 mm x 105 mm x 170 mm
Warm-up< 15 min
Power consumptionapprox. 20 W
  • (1) On request (for reducing gas mixtures)


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