INFWIN DigiGas-CD Carbon Dioxide CO2 Sensor

The INFWIN DigiGas-CD is a carbon dioxide (CO2) sensor with SDI-12 or RS485/Modbus-RTU output, built around a SENSIRION SCD41 photoacoustic NDIR sensing element for high accuracy in a small form factor. Power supply, output interface, connector type, and cable length are configurable via ordering code - the default variant (DigiGas-CD-AAAB002) ships with a 0–5000 ppm CO2 range, RS485/Modbus-RTU output, 9–28V DC supply, a cold-pressed terminal connector, and a 2 m cable. Alongside CO2, the sensor reports air temperature and humidity with automatic compensation. Reverse power protection and built-in TVS/ESD protection are included. Key Features Photoacoustic NDIR CO2 sensing: Built around the SENSIRION SCD41 sensor for high accuracy at a competitive price Long sensor life: Rated for 10 years of service, with temperature and humidity compensation Triple measurement: CO2 concentration, air temperature, and air humidity Digital output: SDI-12 (V1.3) for universal datalogger compatibility and low-power use, or RS485/Modbus-RTU for long cable runs or multi-sensor networks, both with built-in surge protection Compact size: 111 × 25.5 mm sensor body Reverse power protection: Built-in TVS/ESD protection Connector options: Cold-pressed terminal or stripped & tinned lead wires Configuration utility: SensorOneSet software (RS485) or SensorOneSetSDI12 software (SDI-12) included for sensor configuration Excellent price-performance ratio Cable length: 2 m standard; custom lengths available, up to 5 m maximum Applications Smart agriculture Greenhouse monitoring Air conditioning and ventilation control Routine weather monitoring Scientific research Important Notes Custom cable lengths are limited to a maximum of 5 meters for this sensor. IP50 rated - protected against dust ingress and some direct contact, but not rated for washdown, submersion, or outdoor exposure to rain. Wall mounting installation only - not designed for burial or immersion. Operating environment must be non-condensing. CO2 accuracy varies by concentration - tightest at low readings (400–1000 ppm) and widest at high readings (2001–5000 ppm); see specification table for exact figures at each range. Specifications CO2 Range 0–5000 ppm Resolution 1 ppm Accuracy ±(50 ppm + 2.5% of reading), 400–1000 ppm ±(50 ppm + 3% of reading), 1001–2000 ppm ±(40 ppm + 5% of reading), 2001–5000 ppm Air Temperature Range −10°C to +60°C Resolution 0.1°C Accuracy ±0.8°C (15–35°C); ±1.5°C (−10–60°C) Air Humidity Range 0–100% Resolution 0.1% Accuracy ±6% RH (15–35°C, 20–65% RH); ±9% RH (−10–60°C, 0–100% RH) Electrical Output interface RS485 (Modbus-RTU) or SDI-12, V1.3 (selectable via ordering code) Power supply 9–28V DC Quiescent current SDI-12: <10 µA; RS485: <10 mA Measuring current 50 mA @ 12V DC during a 1000 ms measurement; 5000 ms measurement interval Mechanical Dimensions 111 × 25.5 mm (sensor body, length × diameter) IP rating IP50 Connector Cold-pressed terminal or stripped & tinned lead wires (selectable via ordering code) Cable length 2 m standard; custom length available, max 5 m Installation Wall mounting Environmental Operating conditions −10°C to +60°C; 0–95% humidity, non-condensing Ordering Code Guide Code 1: Product Series DigiGas-CD DigiGas-CD, CO2, air temperature, humidity sensor Code 2: Range and Accuracy A 0–5000 ppm (see specification table for accuracy by range) Code 3: Power Supply A X 9–28V DC Customize Code 4: Output Interface A B RS485 (Modbus-RTU) SDI-12 Code 5: Connector B C Cold-pressed terminal Stripped & tinned lead wires Code 6: Cable Length 002 XXX 2 meters Custom (XXX = length in meters, max 5 m) Default Variant: DigiGas-CD-AAAB002 Measuring parameters CO2, air temperature, and air humidity Range and accuracy 0–5000 ppm Power supply 9–28V DC Output interface RS485, Modbus-RTU Connector Cold-pressed terminal Cable length 2 meters Custom variants (power supply, output interface, connector, cable length) are available - contact us to discuss your requirements. Technical Documents User Manual SensorOneSet Configuration Utility (RS485) SensorOneSetSDI12 Configuration Utility (SDI-12) Modbus is a registered trademark of Schneider Electric. SDI-12 is a trademark of the SDI-12 Support Group. SENSIRION is a registered trademark of Sensirion AG. INFWIN is a registered trademark of Dalian Endeavour Technology Co., Ltd. MCCI and MCCI Catena are registered trademarks of MCCI Corporation. All other trademarks are the property of their respective owners.