Continuous detection of flammable, CO2, CO and N2O gases in explosion hazardous area with flame proof structure State-of-the art infrared detection principle Long service life time(more than 5 years) Operation in non oxygen environment Self diagnosis function with built-in Microprocessor Fast response time(<6 sec) Built-in back light LCD or OLED display(Only GIR-3000A) Auto calibration and program setting with a magnet bar 2-stage alarm, 1-trouble display and relay contact output 4-20mA (Current source or Sink) output signal Easy configuration of monitoring system by RS-485 Modbus or HART communication(Only GIR-3000A) Calibration and maintenance by one-man

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