TE Connectivity A2L Refrigerant Sensor
TE Connectivity's (TE) A2L Refrigerant Sensor helps mitigate leak hazards without requiring field calibration. The A2L sensor meets all UL and CSA 60335-2-40 Annex LL requirements and uses thermal conductivity sensing technology to detect R-454B and R-32 gases at 10% lower flammability limit (LFL) with ±2.5% accuracy and a 15s response time. TE's A2L Refrigerant Sensor integrates temperature and humidity sensors for environmental compensation, allowing the module to operate over a temperature range of -40°C to +95°C and up to 100% relative humidity. The sensor is resistant to poisoning by typical interference gases and uses automated self-calibration (ASC) to maintain performance for up to 15 years without recalibration.
Features
- Thermal conductivity gas sensor with temperature and humidity compensation
- RS485 Modbus RTU communication protocol with pulse width modulation (PWM) or universal asynchronous receiver-transmitter (UART) options
- Locking connector interface supports customized harnessing (optional IP67 connection)
- Easy installation with compact enclosure design and multiple mounting bracket options
- Enclosed module meets IP54 and salt spray corrosion testing standards
- Integrated anti-condensation heater
- ETL certified to meet UL and CSA 60335-2-40 Annex LL standards
Applications
- Heating, ventilation, and air-conditioning (HVAC) equipment
- Air conditioners
- Water heaters
- Appliances
Specifications
- R-454B, R-32 gas types
- 0% to 100% LFL detection range
- 10% LFL detection threshold
- ±2.5% LFL detection accuracy
- 15s typical response time (max 30s)
- 5s warm-up time
- -40°C to +95°C operating temperature range
- 0% to 100%RH operating humidity range
- Up to 15 years lifetime
- 5VDC to 17VDC supply voltage
- 100mA maximum current
- 0.5W power consumption
- RS485 Modbus RTU communication
- 52mm x 35mm x 14mm (LxWxH)
Additional Resources
Dimensions
Infographic
Published: 2026-10-12
| Updated: 2026-10-22