Model KSEA 504 - Gas Sensor
From Gas Detector
The principle of the measurement cell used is based on the electro-chemical oxidation of carbon monoxide CO to carbon dioxide CO2. The CO in the measurement air reaches the working electrode via a gas-permeable diaphragm, and is oxidised. 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 electrical output signal of the gas measurement probe. The potentiometers and the 3.5 mm jack connection for the calibration are accessible from the outside, and permits a “one-man” calibration.
When used in a pump system, the service life can be heavily reduced, as the electrolyte evaporates more quickly through the porous diaphragm. The measurement cell is sensitive to solvent vapours.
The calibration gas should be 75% of the measurement range, and must contain synthetic air as the carrier gas
Sensitivity: at least 1 ppm
Measuring range: max. 1000 ppm / linear
Standard calibration: 0...250 ppm/ 0...300 ppm
Response time t 90: max. 50 sec
Operating temperature: -10 °C ... +50 °C
Start up after reconditioning: max. 1 h
Pressure range: atmospheric ± 10%
Air humidity: 15...90% non condensing
Position sensitivity: none
Long term output drift: < 5% / year
Life span at 20 °C: at least 3 years depends on the application
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.