NDIR IR Gas Sensor

NDIR infrared gas sensors measure gas concentration by detecting infrared light absorption at target gas wavelengths. Industrial process control engineers, building automation specialists, environmental monitoring agencies, and military facility managers across Pakistan use these sensors. In contrast to electrochemical sensors, NDIR designs require no consumable reagents. They also deliver significantly longer operational lifespan across continuous monitoring installations.

The sensor directs infrared light from a broadband source through a sample gas cell. Target gas molecules absorb infrared energy at their characteristic absorption wavelength. A narrowband optical filter passes only this specific wavelength to the detector. As a result, the detector measures light intensity reduction proportional to gas concentration. Additionally, a reference channel at a non-absorbing wavelength compensates for source intensity drift. Consequently, this dual-beam design maintains measurement accuracy over years of continuous operation without manual recalibration.

Target gases include carbon dioxide at 4.26 microns, carbon monoxide at 4.67 microns, and methane at 3.3 microns. Each gas requires a dedicated optical filter. Measurement ranges cover 0 to 5000 ppm for indoor air quality work. Process gas monitoring variants extend to 0 to 100% volume. Furthermore, response time runs between 15 and 60 seconds for 90% of full reading. In addition, sensor lifespan extends between 5 and 15 years under normal operating conditions.

Output interfaces include analog 4-20mA, 0-10V, and digital I2C, UART, and Modbus RTU protocols. These integrate directly with SCADA systems and building management platforms. Moreover, operating temperature range covers -20°C to +60°C on industrial-grade variants. Finally, automatic baseline correction maintains long-term zero stability across continuous monitoring installations throughout Pakistan.

Tactical Supply Pakistan supplies NDIR IR gas sensors to building automation engineers, industrial process safety teams, environmental monitoring agencies, HVAC system integrators, and military facility management programs requiring accurate, reagent-free gas detection capability across indoor air quality, process safety, and environmental monitoring applications throughout Pakistan.