Product Name: Composite gas detector Model: M40 (intrinsically safe coal CZ) Brand: Cisco Britain 

 · M40 sustainable use of lithium-ion battery runs 18 hours, M40 with SP40 pump, the lithium-ion battery lasts 12 hours running 
 * Sound, light and vibration alarm, leave the peak readings, large LCD screen, high, low concentration, STEL, TWA, low power and low flow alarm 
 · M40 with optional SP40 pump, the remote sampling up to 15 meters, M40 are equipped with battery charger is ideal for energy-saving 
 · M40 durable, its shell shock and anti-electromagnetic interference, even in harsh environments to ensure good performance. Four function keys can be used for simple, intuitive operation, including browsing the data, zero, calibration, etc., the 5 seconds off delay to prevent an incorrect shutdown. 
 M40 and SP40 China's coal safety certification, certificate number: 20052275. 

 Technical parameters: 

 Housing: Impact resistant composite materials, anti-electromagnetic interference and radio frequency interference, protection class IP65 enclosure 
 Size: 62 mm × 35 mm × 109 mm 
 Sensor: can any optional 1 to 4; combustible gas, O2, CO, H2S 
 Range: flammable gas: 0 ~ 100% LEL, Resolution: 1% LEL 
 Methane: 0 to 5%, resolution 0.01% VOL (MA) 
 Oxygen: 0 ~ 30% VOL, Resolution: 0.1% VOL 
 CO: 0 ~ 999ppm, resolution 1ppm 
 Hydrogen sulfide: 0 ~ 500ppm, resolution 1ppm 
 Display: Large LCD display with backlight 
 Temperature: -20 ~ 50 ℃ Humidity: 15% ~ 95% RH (non-condensing) 
 Data Output: LEL gas: 200 hours; four gas: 50 hours, using the RS232 interface 
 Alarm: 90dB sound, light and bright LCD display shows alarm, high and low concentration, STEL, TWA and low battery alarm, the instrument with a flow alarm indication when the pump