QM-9000D Series 
■ Internal Pressure Explosion Proof Structure (IP66)
■ Controls zeroing, density and temperature correction function by magnetic key or computer monitoring system without opening the cover
■ 2-Way transmission feature at Computer system and Controller
■ When additional detection unit is expanded, automatically expands and reduces by accessing to the closest communication line, and connecting to the related computer monitoring system
■ Indicates self-illuminating FND (LED) for continuous indication of atmospheric gas concentration evenin dark environment

SPECIFICATION 
ProductSpec (Model No)  :  QM-9000D(F) 
MeasuringGas : H2,C2H2, C2H4 etc, Flammable Gas 
MeasuringRange : 0~100 %LEL 
MeasuringMethod  : Diffusion Type,Catalytic Combustion Cell Type, Semiconductor Type 
MeasuringSignal  :  4~20mA.DC, RS-485,Relay contact (H.HH) 
Response Time/Accuracy  :  Less than 20 seconds/ Less than ±3% / Full scale 
OperatingPower  :  21~31V.DC 
ExplosionProof Permit (Approval)  :  Ex d II C T6 (IP66)(KOSHA) 
Option :  Explosion Proof AlertLight (Option)