... device 1)Unit:ppm, mA, %,%LEL,%VOL 2)Display:backlight LCD, LED 3)Humidity: 10-95%RH (non condensing) Gas ... IEC61508,simple and easy installation and maintenance. * Multi-parameter backlight LCD display: measuring range,digital gas reading ,units, bar graph , ... (fault signal) T90: <15sResolution: 1μA Accuracy: ±3%F.S., ±1%F.S.(on request)Operating temperature: Sensor dependent, -40~70C(typical ...