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 magnet bar on FND display board 4-Digit digital gas concentration display 4-20mA (Current source or Sink) output signal Easy configuration of monitoring by RS-485 Modbus 3-Wire Type 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

Auto Sampling type 

   Measuring method

Photo-Ionization Detector(PID) or Semiconductor cell

   Measuring range

0 ~ 300 ppm

   Response time

Varies by gas


±3% / Full Scale

   Parameter control

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

   Operation mode display

Alarm LED / Trouble LED, Flow rate 

   Measuring value display

FND Display(4-Digit)

   Alarm signal output

 2A@30VDC, 0.5A@125VAC (resistive load) 

 3-SPST relay contact(2stage alarm, 1 trouble)







   Output signal


Analog : 4-20mA Analog Output

Maintenance signal : 4mA

Calibration signal : 3mA

Fault signal : 0mA

Digital : RS-485 Modbus(Option)

   Sampling method

Diaphragm Pump

   Sampling line

OD 1/4"(Standard)

   Flow rate

 0 ~ 1000 ml/min max

   Conduit connection

Standard : PF 3/4"

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

   Mounting type

Wall mount

   Operating temperature  

-20°C ~ +60 °C

   Operating humidity 

5 to 99% RH (Non-condensing)




195(W) x 139(H) x 154(D)mm