CO2 (R744) Refrigerant Leak Sensor - R3

The MAXMAC CO2 (R744) Refrigerant Leak Sensor - R3 is developed based on non-dispersive infrared (NDIR) technology and is suitable for carbon dioxide refrigerant leak detection and safety warning applications. With high accuracy, fast response, good consistency, and excellent long-term stability, it is widely applicable to HVAC systems, environmental monitoring systems, and related safety detection scenarios.

  • Stable and reliable detection based on NDIR technology
  • Fast response and short warm-up time
  • Excellent long-term stability with RS485 interface support
CO2 (R744) Refrigerant Leak Sensor - R3
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Sensor Technology Principle
CO2 (R744) Refrigerant Leak Sensor Principle Diagram
CO2 (R744) Refrigerant Leak Sensor Principle Diagram
Technical Specifications
CO2 (R744) Refrigerant Leak Sensor - R3
Product Name
CO2 (R744) Refrigerant Leak Sensor - R3
Operating Principle
Non-dispersive infrared (NDIR)
Measured Gas
CO₂ / R744
Measurement Range
400–10,000 ppm / Customisable
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
4.5–5.5 VDC or 9–28 VDC
Current Consumption
Average 16 mA, peak 300 mA (duration <10 ms / sampling cycle)
Operating Temperature
0°C ~ 50°C
Operating Humidity
5% ~ 95% RH, non-condensing
Storage Temperature
-30°C ~ 70°C
Dimensions
72 mm × 71 mm × 19 mm
Weight
Approx. 25 g
Interface
RS485
Applications
Refrigerant Leak Monitoring / Safety Warning

Refrigerant Leak Monitoring / Safety Warning

Suitable for leak detection and safety warning in CO2 (R744) refrigeration systems. It monitors carbon dioxide concentration changes in real time, helping systems identify abnormal conditions promptly and improving operational safety and reliability.

HVAC / Environmental Monitoring

HVAC / Environmental Monitoring

Suitable for HVAC systems, environmental monitoring systems, smart buildings, and industrial CO₂ monitoring, providing a stable, accurate, and easy-to-integrate sensor solution.

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