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AM4203-FC A2L Refrigerant Leak Detection Sensor

AM4203-FC A2L Refrigerant Leak Detection Sensor
Regular price $125.00

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The AM4203-FC A2L Refrigerant Leak Detection Sensor detects A2L gases (including R32, R454A, R454B and R454C), and A3 gas R290. Based on NDIR (Non-Dispersive Infrared) technology, AM4203 Series could detect and monitor refrigerant gas leakage and provide early warning. It has the advantages of fast response, excellent accuracy and good long-term stability. Full auto baseline calibration mechanism also secure free of maintenance during its life span.

To adapt for industrial and commercial multi-drop communication application, AM4203 Series is extended with 12/24 VDC power supply, RS485 and Modbus communication. It could fulfill more efficient integration with industrial refrigerant monitoring systems.


  • Dual-beam NDIR technology
  • 0-100% LFL measurement range for refrigerant gases
  • Excellent accuracy over full measurement range under matrix calibration
  • Advanced auto baseline calibration mechanism
  • Industrial grade 12/24VDC power supply
  • RS485 and Modbus communication
  • Long life span of 15 years
  • OEM and ODM flexible service
  • Fulfillment with UL 60335-2-40 requirements


AM4203-FC A2L Refrigerant Detection Sensor - A2L Sensor with Modbus & Relay Output.


  • Measuring Gas: R32/R454B/R454C/R454A/R290/R1234ze
  • Measurement Range: 0~50% LFL (Extendable up to 100% LFL)
  • Accuracy: ±2.5% LFL (@15%~25%LFL,-30~60℃)
  • Working Temperature: -30~60℃
  • Power Supply: 12/24VDC
  • Communication: MODBUS RTU and Relay (option)
  • Lifespan: >15 years
  • Certificate Conformity: CE, EMC, RoHS, Reach Certificate Available

     Comply with IEC 60079-1, UL 60335-2-40 4th


  • 90 Days. See CO2Meter Terms and Conditions.
  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

  • Case Studies

Customer Reviews

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"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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