CO2 (R744) Refrigerant Leak Detection Sensor - R3

NDIR carbon dioxide gas detection module for R744 refrigerant leak monitoring

The MAXMAC CO2 (R744) Refrigerant Leak Detection Sensor - R3 is an NDIR carbon dioxide gas sensor module designed for R744 refrigerant leak detection and high-concentration CO2 safety warning applications. It is suitable for CO2 refrigeration systems, heat pumps, commercial refrigeration, cold-chain equipment, HVAC systems, equipment rooms and environmental CO2 monitoring. R3 provides stable CO2 concentration measurement, fast response and long-term reliability, helping ventilation, alarm and equipment control systems identify abnormal CO2 levels early and improve operating safety.

  • NDIR infrared detection technology
  • Automotive-grade adaptability for demanding operating conditions
  • 400-10,000 ppm measurement range, customizable up to 50,000 ppm
  • 1 ppm resolution, ≤10s warm-up time and ≤20s response time
  • 15-year service life, with RS485 and customized LIN 2.1 / CAN system integration support
CO2 (R744) Refrigerant Leak Detection Sensor - R3 NDIR CO2 gas detection module
Sensor Detection Principle
CO2 (R744) Refrigerant Leak Detection Principle Diagram
NDIR CO2 (R744) refrigerant leak detection principle diagram
Technical Specifications
CO2 (R744) Refrigerant Leak Detection Sensor - R3
Product Name
CO2 (R744) Refrigerant Leak Detection Sensor - R3
Operating Principle
Non-dispersive infrared (NDIR)
Measured Gas
CO2 (R744)
Measurement Range
400-10,000 ppm / customizable up to 50,000 ppm
Resolution
1 ppm
Measurement Interval
4 s
Accuracy
400-3000 ppm: ±(50 ppm + 3% of reading)
Other ranges: ±(50 ppm + 5% of reading) or ±5%, whichever is greater
Warm-up Time
≤ 10 s
Response Time
≤ 20 s (τ63%)
Life Expectancy
> 15 years
Operating Voltage
5.0 VDC / customizable
Current Consumption
Average 16 mA, peak 300 mA (duration <10 ms / sampling cycle)
Operating Temperature
0°C to 50°C
Operating Humidity
5%-95% RH, non-condensing
Storage Temperature
-30°C to 70°C
Dimensions
72 mm × 71 mm × 19 mm
Weight
Approx. 25 g
Interface
RS485 / customizable LIN 2.1 / CAN
Applicable Scenarios
  • CO2 refrigeration systems
  • R744 heat pump equipment
  • Commercial refrigeration equipment
  • Cold storage and cold-chain systems
  • HVAC systems
  • Equipment room CO2 concentration monitoring
  • Environmental CO2 monitoring systems
  • Industrial CO2 safety monitoring
  • Ventilation interlock and safety warning systems
  • RS485 system integration applications
  • Custom LIN / CAN interface applications
Applications
CO2 (R744) refrigerant leak detection sensor for refrigeration safety warning

CO2 Refrigerant Leak Monitoring and Safety Warning

Suitable for leak detection and safety warning in CO2 (R744) refrigeration systems. R3 monitors carbon dioxide concentration changes in real time and helps equipment control systems, ventilation systems or alarm systems identify abnormal conditions promptly. It can be used in commercial refrigeration, cold storage, cold-chain equipment, heat pumps and related R744 refrigeration systems to improve operating safety and reliability.

CO2 (R744) refrigerant leak detection sensor for HVAC and environmental CO2 monitoring

HVAC and Environmental CO2 Monitoring

Suitable for HVAC systems, environmental monitoring systems, smart buildings, equipment rooms and industrial CO2 monitoring applications. Based on NDIR detection technology, R3 provides a stable sensor signal for CO2 concentration detection, ventilation control and safety warning systems, supporting equipment operation management and air environment safety monitoring.

Related Products