Gas detection probes certified with ATEX, 4- 20mA, for control units P81 and P82 (S84–S85–S86)

General Features: Sensor type: catalytic, standard; Measurement range 0…100% LEL; Sensor precision ± 5% of the probe scale, ± 10% of reading; Precision (semiconductor) ± 10% of full scale (the calibration point); Repeatability ± 5% of full scale, ± 10% of reading; Measurement resolution 1% LEL; Digital processing of Kalman filter measurement; Preheating time < 2m; Stabilization time < 2m; Maximum response time < 20s (T50), < 60s (T90); Average life time of the sensor in air 255 weeks; Environment temperatures: – operating -20 ÷ 50 °C; – storage -20 ÷ 70 °C; Environment humidity without condensation: – operating 15 ÷ 90 %UR; – storage 45 ÷ 75 %UR; Operating pressure (KPa) 80 ÷ 110; Air speed (m/s): ± 6; Optical signals – red LED visible on the powered probe; Dimensions: 164 x 100 x 82 mm; Unit weight 0.8 Kg.

Electric Features: Power supply: 11 ÷ 28 Vdc; Absorption: maximum 3.2 W; Output logic 4…20mA: proportional logic 4mA = 0% LEL; 0 ppm (default) 20mA = 100% LEL; 500 ppm;

absorption logic 0mA = no alarm (applications with 1 or 2 thresholds)  10mA = 1st threshold alarm – 20mA = 2nd threshold alarm; reference selection  of the signal 4…20mA to 1/2 of jumpers with reference to power supply negative or positive signs 4…20mA output load resistance up to 200Ω at 12Vdc power supply and up to 200Ω¸ 700Ω at 24Vdc power supply