QM-4700D Series 
■ Internal Pressure Explosion Proof Structure
■ Designed with constant voltage circuit for safe operation of overcurrent shutoff circuit detection sensor
■ Connects to an analog standard output (4~20mA) signal to DCS&PLC monitoring system
■ Detects flammable gas in real time through installation at industrial and explosion hazard area, Provides standard output of 4~20mA. DC and uses the device by connecting to various control units

SPECIFICATION
ProductSpec (Model No) : QM-4700D(T),QM-4700D(O₂) 
MeasuringGas : ToxicGas, Oxygen(O₂), CO, Cl₂, NH₃, SO₂, H₂S, NO, HF, NOX, SOX, etc
VOC, Benzene, Toluene, Xylene, etc. 
MeasuringRange : 0~PPM – Toxic, 0~25%Vol – Oxygen (O₂), Adjustable Range 
MeasuringMethod :  Diffusion Type,Catalytic Combustion Cell Type, Semiconductor Type 
MeasuringSignal  :  4~20mA.DC 
Response Time/Accuracy : Less than 20 seconds/ Less than ±3% / Full scale 
OperatingPower : 24V.DC 
ExplosionProof Permit (Approval) : Ex d II C T6 (KOSHA)