Measurement of gas concentration in air Multiple ranges / Model variants Operation with the device in SLEEP mode is not possible! Technical Data Gas: see model variants Measuring principle: electrochemical reaction Measuring range: see model variants Error of meas. value: ±3 % of full scale value Zero point drift: < 2 % (1 year) Linearity: < 2 % of full scale value Transverse sensitivity: < 2 % by integrated filter Nominal conditions: 20 °C, 50 % r.H., 1013 mbar Operating conditions: -10 to +40 °C, Sensor in range temperature compensated > 15 to 90 % r.H. non-condensing Life span of the meas. cell: approx. 2 years typical Output: 4 ... 20 mA on ALMEMO® connector Supply voltage: 24 V via ALMEMO® connector Dimensions of meas. head: 0 80 mm, height 80 mm Weight: 600 g Connecting cable: 1.5 m, with ALMEMO® connector 11/2025 • We reserve the right to make technical changes. Model variants (including factory test certificate) Gas probe, including connecting cable, 1.5 meters, for measuring gas in air Ammonia NH3 Range: 0 ... 250 ppm Nitrogen dioxide NO2 Range: 0 ... 30 ppm Nitrogen oxide NO Range: 0 ... 50 ppm Chlorine gas Cl2 Range: 0 ... 50 ppm Sulfur dioxide SO2 Range: 0 ... 20 ppm Range: 0 ... 50 ppm Range: 0 ... 250 ppm Range: 0 ... 20 ppm Range: 0 ... 50 ppm Range: 0 ... 100 ppm