NDIR CO2 Gas Sensor

NDIR CO2 gas sensors detect and measure carbon dioxide concentration using non-dispersive infrared absorption technology. Industrial ventilation systems, indoor air quality monitors, greenhouse gas measurement equipment, and military facility management installations across Pakistan use these sensors. They provide accurate, long-life CO2 monitoring without the reagent consumption and drift issues of chemical-based detection methods.

The sensor directs infrared light from a broadband source through a sample gas cell. Carbon dioxide molecules absorb infrared radiation strongly at 4.26 microns wavelength. A narrowband optical filter passes only this specific wavelength to the photodetector. As a result, the detector measures the reduction in transmitted light intensity. The sensor then calculates CO2 concentration from this absorption using the Beer-Lambert law. Additionally, a reference detector channel at a non-absorbing wavelength compensates for source intensity drift over time. Consequently, this dual-beam design maintains measurement accuracy without frequent recalibration.

Measurement range on standard NDIR CO2 sensors covers 0 to 2000 ppm for indoor air quality applications. Industrial variants extend to 0 to 100% volume CO2 for high-concentration process streams. Response time runs between 30 and 60 seconds for 90% of full reading. Furthermore, sensor lifespan extends between 5 and 15 years without reagent replacement. Output interfaces include analog 0-5V, 4-20mA current loop, and digital I2C, UART, or Modbus RTU protocols. These connect directly to building management systems, HVAC controllers, and industrial process platforms.

Operating temperature range covers 0°C to 50°C on standard commercial variants. Industrial-grade models extend to -20°C to +60°C. Moreover, automatic baseline correction algorithms periodically reset the zero point during low-CO2 periods. This maintains long-term measurement accuracy without manual intervention across continuous monitoring installations throughout Pakistan.

Tactical Supply Pakistan supplies NDIR CO2 gas sensors to building automation engineers, HVAC system integrators, industrial process control teams, greenhouse facility operators, and environmental monitoring programs requiring accurate carbon dioxide detection capability throughout Pakistan.