Model KSEA 637 - Gas Sensor
From Gas Detector
Through the diffusion of sulphur dioxide SO2 into the inside of the measurement cell, a reaction with the electrode will take place. The product at the working electrode then oxidises. The oxygen molecule used for this is replaced from the ambient air. This results in the very long service life of the measurement cell, which, from experience, can operate for several years. The measured gas concentration is linear to the electric output signal of the gas sensor. The potentiometers and the Jack 3,5 mm connector are located at the side of the sub case on the sensor housing. This design allows a „one-man“ calibration. When the sensor is mounted in a sampling system (Pump system), the lifetime can be shorter because the flow absorbs the electrolyte. The cell is sensitive to solvent vapours. For a maximum accuracy the detector should be calibrated using a gas mixture containing 75% of the measuring range; the carrier gas has to be synthetic air.
Sensitivity: 0.1 ppm
Measuring range: max. 100 ppm / linear
Standard calibration: 0...10 / 0...20 ppm
Response time t 90: max. 15 sec
Operating temperature: -20 °C ... +50 °C
Start up after reconditioning: max. 1 h
Pressure range: atmospheric ± 10%
Air humidity: 15...90% non condensing
the signal will increase
for a short time
Position sensitivity: none
Long term output drift: 2% / month
Life span at 20 °C: at least 1 year longer by lower temperature
Sensor electronic specification
Cable: 2-core cable, shielded
Power supply: 13.5...30 VDC (AC as option)
Sensor current: max. 60 mA
Output signal: 4...20 mA/max. 60 mA
Operating temperature: -40 °C ... +85 °C
The sensor and the electronic require an inspection.
Routine calibration is recommended once or twice a year.
IP Protection Classification: IP 54
(with additional PTFE-Protector IP 65)
Material: rust-proof and acid-resistant steel
Weight: 410 gr.