INFWIN DigiGas-OX Oxygen Concentration and Partial Pressure Sensor
The INFWIN DigiGas-OX is an oxygen sensor with SDI-12 or RS485/Modbus-RTU output, measuring ambient oxygen partial pressure (ppO2) and concentration using luminescence quenching - an optical technique, not electrochemical. Power supply, output interface, connector type, and cable length are configurable via ordering code - the default variant (DigiGas-OX-AAAB002) ships with a 0–300 mbar (0–25%) range, RS485/Modbus-RTU output, a cold-pressed terminal connector, and a 2 m cable. Alongside oxygen, the sensor reports temperature and barometric pressure, which factor into the concentration calculation. Reverse power protection and built-in TVS/ESD protection are included. Key Features Optical oxygen sensing: Built around an SST oxygen sensor using luminescence quenching, not an electrochemical cell Long sensor life: Rated for more than 2 years of service, maintenance-free Triple measurement: Oxygen partial pressure/concentration, temperature, and barometric pressure 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 Scientific research Air conditioning and ventilation control Routine weather monitoring Environmental monitoring Important Notes Oxygen concentration (%) accuracy depends on both the oxygen partial pressure accuracy and the barometric pressure accuracy - it is not a single fixed figure. Rated operating temperature range for the sensor is narrower than most of INFWIN's other outdoor sensors: 10°C to 45°C. 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. Specifications Oxygen Partial pressure range 0–300 mbar Partial pressure resolution 0.1 mbar Partial pressure accuracy <2% FS Concentration range 0–25% Concentration resolution 0.01% Concentration accuracy Determined by the combined accuracy of oxygen partial pressure and barometric pressure Temperature Range −10°C to +60°C Resolution 0.1°C Accuracy ±2°C Barometric Pressure Range 500–1200 mbar Resolution 1 mbar Accuracy ±5 mbar Electrical Output interface RS485 (Modbus-RTU) or SDI-12, V1.3 (selectable via ordering code) Power supply 9–28V DC Quiescent/average current SDI-12: <10 µA @ 12V DC; RS485: <10 mA @ 12V DC Measuring current <20 mA @ 12V DC; 1000 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 +45°C; 0–95% humidity, non-condensing Ordering Code Guide Code 1: Product Series DigiGas-OX DigiGas-OX oxygen partial pressure and concentration sensor Code 2: Range and Accuracy A 0–300 mbar (0–25%), <2% FS (see specification table for full accuracy) 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-OX-AAAB002 Measuring parameters Oxygen partial pressure/concentration, temperature, and barometric pressure Range and accuracy 0–300 mbar (0–25%), <2% FS 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. 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.