Leading ODM Wearable CO2 Monitor Supplier & Global Engineering Partner

Non-Dispersive Infrared (NDIR) technology measures carbon dioxide based on its specific absorption wavelength of light (around 4.26 µm). Unlike Metal-Oxide Semiconductor (MOX) sensors, which cross-react with volatile organic compounds (VOCs), ethanol, and humidity fluctuations, NDIR provides absolute, highly specific quantification without chemical degradation. This guarantees 10+ year operational lifespans without sensor poison risks.

ABC logic assumes that over an extended interval (typically 7 to 14 days), the sensor’s lowest detected reading corresponds to pristine outdoor baseline air (approx. 400–420 ppm). While ideal for commercial offices and classrooms that empty out overnight, ABC must be manually or firmware-disabled in controlled agricultural greenhouses, breweries, or continuous industrial facilities where background CO2 never recedes to ambient outdoor levels, preventing artificial baseline depression.

NDIR sensors detect the absolute number of CO2 gas molecules present inside the optical sample chamber, dictated by the Ideal Gas Law. At high altitudes or under fluctuating barometric conditions, reduced air pressure causes an optical reading to read lower than actual volumetric ppm. Shield’s custom ODM solutions incorporate onboard MEMS barometric pressure sensors to automatically apply real-time compensation calculations to output ppm data.

Standard private labeling, custom firmware loading, and packaging customization typically start at an MOQ of 500 units with 4-week delivery. Full custom tooling, tailored housing molds, and ground-up circuit engineering run on typical sample lead times of 30 to 45 business days, backed by prototype 3D validation and DFM (Design for Manufacturing) design feedback.

While stationary field detectors (such as our SD2100E and SD2130 series) use hardwired RS-485 Modbus or 4–20mA current loops to directly trip electromagnetic shut-off valves like the JYFJS-011, our wearable detectors bridge to centralized networks using Bluetooth Low Energy (BLE) or LoRa gateways, enabling telemetry ingestion into the Shield 8001AB control architecture or third-party industrial supervisory panels.