HD900 4in1 gas detector

www.chinacoalintl.com m.chinacoalintl.com we provide service of enterprise's customs declaration, inspection. Product Introduction HD-900, The bright, large LCD shows real-time gas concentrations and the instrument’s status at all times. The full function self-test verifies sensor, circuitry and battery integrity and activates the audible/visual alarms each time you turn the instrument on. The detector clearly advises the gas hazard present—Low, High, TWA and STEL gas alarm.