SenseCAP CO2, Temperature and Humidity Sensor with RS-485 & SDI-12

The SenseCAP CO, temperature, and humidity sensor is designed for reliable environmental monitoring in a range of indoor and outdoor settings such as greenhouses, urban infrastructure, farms, and transit stations. Using non-dispersive infrared (NDIR) technology, it provides accurate and continuous CO concentration readings, alongside temperature and humidity, output via standard digital interfaces.

The sensor supports both RS-485 (Modbus-RTU/ASCII) and SDI-12 communication protocols, making it compatible with most data acquisition devices and systems. With a wide 524V operating voltage range and low power consumption (down to A in SDI-12 mode), it suits both fixed and mobile deployments. The built-in calibration functionality simplifies integration and maintenance, while optional manual calibration can be triggered via onboard keys or serial commands.

Internally, the sensor features a single air chamber with a dual-channel setup, enhancing measurement reliability. It uses a PTFE breathable membrane with a protective enclosure, improving air permeability and ensuring stable long-term performance. With a small form factor, it is easy to install and connect to data loggers like the SenseCAP S2100 LoRaWAN Data Logger or Sensor Hub 4G Data Logger for remote access.

Features

• 3-in-1 sensor: Measures CO, air temperature, and relative humidity
• NDIR sensing principle with single-air-chamber, dual-channel design
• Supports RS-485 (Modbus-RTU / Modbus-ASCII) and SDI-12 protocols
• Wide power supply range: 5V to 24V
• Factory-calibrated with optional custom calibration via buttons or commands
• Low power consumption: A-level current in SDI-12 mode
• CO measurement range: 0 to 10,000 ppm
• CO accuracy: (40 ppm + 3% of measured value)
• PTFE breathable membrane and protective housing for improved stability
• Compact, lightweight, and easy to install
• Compatible with SenseCAP S2100 LoRaWAN and Sensor Hub 4G data loggers
• Suitable for use in greenhouses, cities, farms, and transit hubs

Specifications

Resources

• Datasheet / Guide

Package Contents

• 1x SenseCAP CO2, Temperature and Humidity Sensor with RS485 & SDI-12
• 1x Mounting bracket
• 4x Self-drilling Screw – 2cm
• 3x Self-drilling Screw – 6mm