G4442 Carbon Dioxide NDIR Infrared Gas Sensor
Model: G4442
Shanghai Yixin G4442, 0 – 1% VOL range, dual-wavelength NDIR detection
The Shanghai Yixin G4442 is an intelligent miniature NDIR (Non-Dispersive Infrared) gas sensor using a dual-wavelength optical path. It measures gas concentration by infrared absorption, with no oxygen dependency and no catalytic-sensor poisoning. Built-in linearization and temperature compensation provide direct analog voltage or UART digital concentration output. Detects Carbon Dioxide over a 0 – 1% VOL range, operating at 0 ℃ to +50 ℃ (wide temp -40 ℃ to +70 ℃ optional). Suitable for industrial plants, traffic tunnels, energy & power, oil & petrochemicals, coal mine roadways, gas drainage and environmental monitoring. The G4 series also supports more than 50 special gases such as methyl bromide, chloromethane, propane, butane, ethanol and acetone (requires calibration) — please inquire for details.
Key Features
- Dual-wavelength NDIR design, no oxygen dependency
- No catalytic sensor poisoning, long lifetime
- Built-in linearization and temperature compensation, analog & digital outputs
- Range up to 100%VOL
- Wide operating temperature -40 ℃ to +70 ℃ (combustible/hydrocarbon)
- Ex ia I Ma and Ex ia IIC T4 Ga dual explosion-proof certification
- IP65 protection (optional waterproof breathable membrane)
- 18-month warranty
Typical Applications
Calibration & Cross-Sensitivity
Calibrated with Carbon Dioxide standard gas; special gases require recalibration with the actual target gas — see the G4 selection guide appendix for details.