... gas safety device 1)Unit:ppm, mA, %,%LEL,%VOL 2)Display:backlight LCD, LED 3)Humidity: 10-95%RH (non condensing) Gas ... * Multi-parameter backlight LCD display: measuring range,digital gas reading ,units, bar graph , system status etc.* International ... . * Automatic temperature compensation ensure the correct measurement. Gas transmitter Technical dataRanges: Sensor dependentPower supply: 10.5...45VDC ...