RS485 Carbon Monoxide CO Sensor

The RS485 Carbon Monoxide (CO) Sensor measures CO concentrations from 0–2,000ppm alongside temperature, with built-in compensation for stable readings and RS485 Modbus RTU connectivity for straightforward integration.

The Seeed RS485 Carbon Monoxide (CO) Sensor is a compact, wall-mounted sensor designed for industrial, environmental, smart home air-quality, and laboratory monitoring.

It measures CO concentrations from 0 to 2,000 ppm while also providing calibrated temperature data. In addition, integrated temperature compensation and low baseline drift help maintain stable readings under changing conditions.

For easy integration, it supports RS485 Modbus RTU communication and operates on a 5–28 V DC power supply. Its low-power design, reverse-polarity protection, and built-in surge, TVS, and ESD protection ensure reliable long-term use.

Features

• Integrated CO and Temperature Monitoring: Measures carbon monoxide concentrations from 0 to 2000 ppm—with a resolution of 10 ppm—and provides calibrated temperature data. Moreover, its T90 response time of less than 35 seconds enables timely detection of concentration changes.
• Temperature Compensation and Flexible Calibration: Supports both sensor-sensitivity calibration and standard-gas calibration. Zero and span calibration help improve measurement accuracy. Meanwhile, configurable temperature-compensation coefficients and temperature-offset adjustment reduce the influence of changing ambient temperatures.
• Industrial RS485 Modbus RTU Communication: Uses the RS485 Modbus RTU interface for reliable long-distance data transmission and connection of multiple sensors on the same communication bus. Configurable device address, baud rate, parity, and data format make integration with industrial controllers, data loggers, and monitoring systems more flexible.
• Compact, Low-Power and Protected Design: Features a compact, wall-mounted structure and supports a wide 5–28 V DC power supply. Its low-power design helps reduce energy consumption. Furthermore, surge, reverse-polarity, TVS, and ESD protection improve operational reliability reliability—supporting an expected service life of at least two years in air.
• SenseCAP S2100 Data Logger can connect to Modbus RS485/Analog/GPIO industrial sensors including the Grow Your Idea and transmit data from sensors to the LoRaWAN network. Benefiting from its high robustness and waterproof and dustproof enclosure, the S2100 data logger can work under harsh environments such as high UV exposure, heavy rain, dusty conditions, etc. which is ideal for outdoor use. Based on LoRaWAN, it can cover a long transmission range of 2km in urban scenes and 10km in line-of-sight while keeping lower power consumption. Equipped with built-in Bluetooth and app service for OTA configuration and remote management, it enables quick setup and update. It can be battery-powered or connected to a 12V external power supply. When the 12V power supply is connected, the replaceable built-in battery is set to be used as the backup power supply.

Specifications

Wiring Diagram

Resources

• Datasheet

Package Contents

• 1x RS485 Carbon Monoxide CO Sensor
• 1x Mounting bracket
• 2x Plastic screws
• 2x Metal screws