Renke RS-CO2-N01-2-5000P Carbon Dioxide Sensor, 0-5000ppm, -40°C to 80°C, RS485 Modbus

This sensor uses the RS485 serial interface with the Modbus RTU communication protocol. It requires a Modbus-capable master device (like a PLC, industrial gateway, or microcontroller with a MAX485 module) to read the CO2 concentration data. The specific register addresses and data format are detailed in the manufacturer's Modbus register map.

The sensor operates on a wide-range 10-30V DC power supply, with an average current draw of less than 85 mA. You must connect the positive and negative power leads to the designated terminals on the sensor. The RS485 data lines (A/B or D+/D-) should be connected to your host device's RS485 port, ensuring proper termination and bias resistors are configured on the bus for reliable communication over long distances.

The sensor provides a usable reading approximately 2 minutes after power-on. For maximum precision and stability, a full warm-up period of 10 minutes is recommended. The integrated NDIR sensing element and optical bench require this time to reach thermal equilibrium, ensuring readings are within the specified accuracy and stability limits.

Yes, its extended operating temperature range of -40°C to 80°C and robust construction make it suitable for challenging environments, including unconditioned warehouses, agricultural settings, and external air intake monitoring. Ensure the unit is mounted in a location protected from direct water immersion, as the IP rating should be verified from the official datasheet for specific environmental protection levels.