CO2, Temperature, Humidity Sensor with RS485&SDI-12

This is a digital CO2 concentration sensor based on NDIR (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 adopt PTFE film combined 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 supports RS485(Modbus -RTU / Modbus -ASCII) and SDI-12 communication 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

SeeedStudio offers the SenseCAP S2100 - LoRaWAN® Data Logger - Seeed Studio and SenseCAP Sensor Hub 4G Data Logger suitable for SenseCAP ONE series weather sensors, you can transmit the sensor data to public LoRaWAN® network servers(Helium, TTN, etc.,) or private servers.

Wiring Diagram and Calibration Button

Sensor onboard a switch and a button:

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

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

• 3-in-1 sensor: Measure Carbon 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

Specifications:

• 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: 0°C ~ +50°C (Due to CO2 sensor limitations)
• Working Humidity: 0 ~ 95 %RH (no condensation)
• Cable Length: 2 meters

Measurement Parameters: 

• Carbon Dioxide
  • Range: 0 ~ 10000ppm
  • Accuracy: ±(50ppm+3%*MV）
  • Resolution: 1ppm
• Air Temperature
  • Range: -40~85°C
  • Accuracy: ±0.2℃
  • Resolution: 0.01°C
• Air Humidity
  • Range: 0~100%RH
  • Accuracy: ±1.8%RH
  • Resolution: 0.01%RH

• 1 x Sensor
• 1 x Mounting Bracket
• 1 x Set of 2cm Self-tapping Screw
• 1 x Set of 6cm Self-tapping Screw

• CO2 sensor datasheet