Brief Introduction

PGas-21 portable single gas detector is used to detect the concentration of flammable gases, oxygen gas and many kinds of toxic & harmful gases. It will alarm immediately once the detected gas concentration reaches or exceeds the preset alarm point. Users can set the low and high alarm point according to the practical need.

　　　It is widely used in such industries such as petroleum, chemical, natural gas, fire fighting, municipal administration, pharmacy, steel manufacture, gas storage station, special plants and other places where toxic and harmful gases exist. This model product has been awarded with National Safety Certification for Explosion-proof Products and CE Certification.

Main Features
1.Single gas detection, sound/light/vibration alarms
2.Segment encoding LCD display
3.Backlight setting is available
4.Self-test during starting up
5.Setting upper/lower alarm points, STEL and TWA is also inclusive for toxic gases
6.Adjustable calibration concentration, facilitating users for calibration
7.Modifiable user passwords, providing users with operation protection
8.Large-capacity lithium battery with very long standby time
9.Real-time clock setting function
10.Setting of the silencer
11.Alarm sounds at different frequencies under different alarm conditions
12.Manual cancellation of vibration alarms

13.Automatic battery detection and undervoltage indication

Technical Parameters

Parameters Characteristics
Detected Gas flammable gases, oxygen gas and many kinds of toxic & harmful gases.(Please refer to the Lectotype table)
Sampling Method Diffusion
Measurement Principle Electrochemical(oxygen and toxic gases)
Catalytic combustion(flammable gases)
Infrared principle(carbon dioxide gas)
Response Time (CO2<10s), (O2, flammable gases<20s), (CO , H2S , SO2, CL2, NO, CLO2, NO2, H2<30s), (HCN, NH3, PH3<100s)
Detection Error ±5%F.S
Operation Mode Touch push-keys
Display Mode LCD display
　Working Temperature -20℃~55℃
Environment Humidity 0~95%RH(non condensation)
Storage Temperature 0℃~40℃
Power Supply Rechargeable lithium battery, continuously work for over 24 hours.
Battery 4.2V lithium battery ,1700mA/h 
Dimension 125×66×42 mm
Weight 105g
Certification of Explosion Protection ExiaII CT3
Calibration Mode Optional calibrating cap to facilitate calibration by users.