SenseCAP CO2, Temperature & Humidity Sensor Modbus RS485 & SDI-12

The CO2, temperature, and humidity sensor supports Modbus-RTU/ASCII RS485 and SDI-12 communication protocols, built-in calibration functionality, and is compact in size, making it widely applicable in greenhouses, cities, poultry farms, transportation stations, and other application scenarios where CO2 level is needed.

Features

• 3-in-1 sensor:MeasureCarbon dioxide(CO2), air temperature,relative humidity
• Wide Range & High Accuracy of CO2:0ppm ~ 10,000 ppm, (40ppm+3%*MV)
• High performance:high accuracy, fast response, and superior stability
• Wide-range Power Supply and 2 protocols: 5V ~ 24V power supply, support RS485(Modbus -RTU / Modbus -ASCII) and SDI-12 protocols
• User-friendly: factory-calibrated, supports custom calibration by pressing keys or using commands,easy to install and integrate

This is a digital CO2 concentration sensor based onNDIR(nondispersive infrared), which can continuously collect and calculate the CO2 concentration in the air per unit volume and output in the form of a universal interface. It’s designed to adoptPTFE filmcombined with a protective enclosure, improving its breathable performance. It is more accurate, stable, reliable, low-power consumption, and user-friendly. It compacts in size and can be easily integrated into various application scenarios.

This digital NDIR CO2 concentration sensor supportsRS485(Modbus -RTU / Modbus -ASCII)andSDI-12communication protocols and is compatible with the wide power supply voltage of 5-24V. It has a built-in calibration functionality and can be widely applied in both indoor and outdoor environments. This product also adopts both single-air-chamber and double-channel. This CO2 Sensor (Version CO2-Connector) comes with a waterproof aviation connector, helping you save time and effort in wiring the sensor to a data logger with screws.

Connect with 4G Sensor Hub or LoRaWAN Data Logger for Remote Transmission

Applications

• Smart Agriculture
• Smart Cities
• Industry and Building ventilation systems
• Airport, train station, shopping mall, home, office, classroom, and others
• public places for air quality measurement and indication
• Lab, warehouse, and other places to monitor the CO2 level

Specifications

Basic Parameters
Product Model	S-CO2-03A / S-CO2-03B
Supply Voltage	5 ~ 24 V
Supporting Protocols	Modbus -RTU RS485/ Modbus -ASCII RS485/ SDI-12 (v1.4)
IP Rating	IP65 (shading measures are required for outdoor installation, and the equipment cannot be exposed to direct sunlight and rainwater for a long time)
Operating Temperature	0C ~ +50C (Due to CO2 sensor limitations)
Working Humidity	0 ~ 95 %RH (no condensation)
Cable Length	2 meters
Measurement Parameters
	Range	Accuracy	Resolution
Carbon Dioxide	0 ~ 10000ppm	(50ppm+3%*MV	1ppm
Air Temperature	-40~85C	0.2	0.01C
Air Humidity	0~100%RH	1.8%RH	0.01%RH

Wiring Diagram and Calibration Button

Sensor onboard a switch and a button:

• Switch: select protocols(RS485/SDI-12), default is RS485.
• Button: Pressing the button for 5 seconds can calibrate the sensor value to 400ppm.

Part List

Sensor	x1
Mounting Bracket	x1
Self-drilling Screw – 2cm	x4
Self-drilling Screw – 6mm	x3

Documentations

CO2 Sensor Datasheet(S-CO2-03)