Renke Indoor Digital Analog RS485 Gas Sensor Carbon Dioxide CO2 Transmitter

Uses non-dispersive infrared (NDIR) sensing principle to measure CO2 concentration with high sensitivity, excellent repeatability, and no electrochemical degradation over time.

Selectable ranges of 0 to 2,000 ppm, 0 to 5,000 ppm, or 0 to 10,000 ppm cover indoor air quality, agriculture, and high-concentration industrial applications.

Internal temperature compensation minimizes reading drift caused by ambient temperature fluctuations, ensuring stable accuracy across varying field conditions.

Supports RS485, 4 to 20mA, 0 to 5V, and 0 to 10V outputs in a single product line, compatible with PLCs, data loggers, and SCADA systems out of the box.

The RS-CO2-2D-EX variant is engineered for chicken coops, mushroom rooms, and greenhouses where CO2 and humidity levels spike significantly for extended periods.

Each sensor is calibrated before shipment. Customers do not need to perform secondary calibration, reducing setup time and eliminating calibration equipment costs.

An optional OLED display module can be added for on-site real-time data viewing without connecting to external devices or software.

The breathable membrane on the sensor shell allows free gas circulation to the sensing element while blocking moisture and dust from reaching internal components.

Under normal use, the sensor lasts up to 5 years. Only the breathable membrane requires annual replacement, keeping long-term maintenance costs extremely low.

Available as wall-mounted, duct-mounted, handheld, fixed explosion-proof, and outdoor radiation-shield versions, covering virtually every CO2 monitoring scenario.