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Your position:Home> ProductsKQ500 Gas Alarm System


KQ500 gas alarm system consists of KQ500 gas alarm controller and gas detector. This system can connect many detectors to detect different kinds of gases and monitor the gases in the distance.

KQ500 gas alarm system applies to petroleum prospecting, oil and gas transmission, refinery, metallurgy, power plant, chemical industry, oil depot, liquefied gas station, mines, tunnels, and underground pipeline.



KQ500 gas alarm controller collects 4-20 mA signal from detector, and transfers the signal into digital signal. After internal SCM data processing, LCD screen shows corresponding gas concentration and output control signals.

KQ500 gas alarm controller is easy to be installed. It realizes measurement, displaying, and public alarm control for 4 channel, 6 channel or 8 channel physical quantity. When the concentration of detected gas reaches or exceeds the preset alarming value, controller will send out audible and visual alarm immediately to remind you take safety precautions (start exhaust, control system) to avoid explosion, fire and toxics.

Controller features:

     The controller uses high-grade CPU with high speed and good reliability
     Highlighted digital display
     Monitor various gases at the same time
     Monitoring gas concentration in the distance
     The high and low alarm points of each channels can be set separately
     4-20 mA Signal Output, relay output
     Removable mounting bracket; installation is convenient and fast

Technical parameters

Detecting Gas combustible gas, toxic gas, oxygen
Alarm Level Low and high alarm. Users can set it.
Alarm Mode audible and visual alarm 
Alarm Volume > 120 Db
Alarm Output passive contact, capacity AC220v 5 A
Signal Output (optional) 4-20 m A signal output, 
RS485 output 
Working Temperature -10  50
Working Humidity < 90% R.H. no condensation
Protection Class IP44
Power Supply AC220V,50HZ 
Power Consumption <50W
Transmission Distance length<1000m, diameter< 2mm2, copper wire
Appearance Size 480mm×250mm×120mm
Weight 4.0kg

KQ500 series Fixed gas detector (also called gas sensor or gas transmitter). It can detect various gases such as flammable gas, O2、H2S、CO、HCN、NO2、SO2、NH3、HCL、CL2、H2 etc.  works 365 days. 

KQ500D series fixed gas detector is also called gas sensor. Work 24 hous a day. LED display, 4~20mA output. detector's sensor replaceable.