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Hanwei BS03 Fixed Gas Detector O2


SKU: BS03    Trademark:


BS03 is a fixed gas detector installed in a place where potential gas hazard exists to measure oxygen, toxic gas and combustible gas. It shows not only the concentration of gas but also diagnostic result of the unit itself through the LED screen and LED lights and can be connected to the control panel with a standard 4-20mA analog output.


BS03 measures the concentration of the flammable gas, toxic gas, oxygen and VOCs

Explosion proof structure

Water and dust proof design

Segment display to indicate readings in 4 digits

3 LED lights to indicate Fault, Low alarm and High alarm

IR remote control for setting and calibration.


Steelworks, Petrochemical plants, Shipyards, Water treatment plants, Mines, Power plants, Food industry etc.


Measuring gas
Combustible Catalytic sensor / NDIR sensor
Toxic gas & O2 Electrochemical sensor
CO2 gas NDIR sensor
VOCs PID sensor
Measuring range O2 0-30%VOL
Measuring accuracy ±5%F.S.
Sensor life
Catalytic sensor 3 years
Electrochemical 2 years (1 year for O2 sensor)
NDIR sensor 5 years
PID sensor 0.6 to 1 year
Measuring type Diffuse naturally
Response time
Catalytic sensor T90≤30s
Electrochemical T90≤60s
NDIR sensor T90≤10s
PID sensor T90≤10s
Signal output 4-20mA
Alarm output signal 2 programmable relays
Cable / distance 1.5 MM2, 3 wire, shielded,1000m (maximum)
Conduit connection G3/4”
Mounting type Wall mounted
Working temperature Toxic gas: -20℃~+50℃   Combustible: -40℃~+70℃
Working humidity ≤95%RH (no condensation)
Operation voltage DC24V±25%
Consumption <2W
Ingress Protection IP65
Housing material Chamber: Aluminum alloy
Sensor cover: Stainless steel
Dimension and weight 162 x 208 x 103.5mm, about 2.1kg
Approval II 2G   Ex db IIC T6 Gb

Additional information