Continuous detection of VOC gas in explosion hazardous area with flame proof structure Self diagnosis function with built-in Microprocessor Easy replacement with a cartridge type sensor Digital flow sensor to maintain regular flow rate Fast response of gas leakage with a high efficient pump inside Low concentration VOC gas detection by PID sensor Stable quality and proved detection principle for service life Auto calibration and program setting with a magnet bar 4-digit digital gas concentration display 4-20mA (Current source or Sink) output signal Easy configuration of monitoring by RS-485 Modbus 3-wire connection for signal & power 2-stage alarm, 1-trouble display and relay contact output Calibration and maintenance by one-man

Specification View



  Measuring gas

VOC gases(Benzene, Toluene, Xylene & etc)

  Measuring type

  Diffusion type

  Measuring method

Photo-Ionization Detector(PID) or Semiconductor cell 

  Measuring range

 Refer to Toxic Gas Measuring Range

  Response time

Varies by gas


  ±3% / Full scale

  Parameter control

  Non intrusive control with a Magnet bar (calibration, maintenance)

  Operation mode display

  1-LED (Power)

  Measuring value display

  LCD display (Built in back light 2-Line, 8 characters) / OLED Type (Option)







  Output signal

  Analog : 4-20mA Analog Output

  Maintenance signal : 4mA

 Calibration signal : 3mA

  Fault signal : 0mA

  Digital : 2mA (HART 7, HART Device Description Language available, Option)


  Housing : ALDC, SUS316(Option)

 Sensor : SUS316

  Conduit connection

  Standard : PF 3/4" 

 Option : NPT 1/2", NPT3/4", M20 x 1.5P, M25 x 1.5P

  Mounting type

    2" Pole mount, Wall mount, Option

  Operating temperature 

   -40°C ~ 80°C

  Operating humidity

   5 ~ 99%.RH (non-condensing)


136(W) x 177(H) x 110(D)mm