IEC 60335-2-40 Compliant R-290 Leak Sensor
TE Connectivity (TE)'s A3 refrigerant sensor helps HVAC/R OEMs using R-290 (propane) implement robust leak mitigation systems to help reduce explosion risk. The sensor uses photoacoustic spectroscopy (PAS) technology to meet IEC 60335-2-40 Annex LL requirements, detecting R-290 at 15% LFL with ±2.5% accuracy and a 20-second response time. With integrated temperature and humidity sensors for environmental compensation, the module can operate at temperatures ranging from -40°C to +85°C and up to 100% relative humidity. Resistant to typical interference gas poisoning, the sensor uses automated self-calibration (ASC) to maintain performance for up to 15 years without recalibration.
Product Features
IEC 60335-2-40 Compliant R-290 Leak Sensor to Support Explosion Risk Mitigation Systems
| Gas Type (s) |
R-290 | Operating Temperature (°C) |
-40°C to +85°C |
| Max Current Rating |
150 (mA) | Detection Range |
0%-100% Lower Flammability Limit |
| Voltage Rating | 5V - 17V DC | Detection Threshold | 15% Lower Flammability Limit |
| Communication | RS485 Modbus RTU | Detection Accuracy | ±2.5% Lower Flammability Limit |
| Agency Approvals | TUV | Sealed Version | IP54 |
Key Features
A3 Leak Detection
- PAS R-290 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 supporting customized harnessing (optional IP67 connection)
- Easy installation with compact enclosure design and multiple mounting bracket options
- Enclosed module meeting IP54 and salt spray corrosion testing standards
- Integrated anti-condensation heater
Frequently Asked Question (FAQs)
A3 Refrigerant Sensor
Reliable A3 Gas Detection
What HVAC systems need refrigerant leak detection for regulatory compliance?
HVAC equipment using low-GWP (low-global warming potential) A2L or A3 refrigerants may require leak detection systems to meet safety regulation. TE Connectivity's A3 refrigerant sensor is designed to help meet all IEC/EN 60335-2-40 requirements, helping manufacturers comply with leak mitigation standards. As of March 2024, the revised EU F-Gas Regulation (EU Directive 2024/573) mandates steep reductions in high-GWP refrigerant use across all HVAC/R applications, with phased expansion of these restrictions and associated A3 refrigerant adoption continuing through 2035.
What refrigerant leak sensor is required for R-290 HVAC systems?
HVAC systems using R-290 (propane) refrigerant typically require a leak detection solution that can support compliance with IEC 60335-2-40 safety requirements. TE Connectivity's A3 refrigerant sensor is designed specifically for R-290 leak detection, helping OEMs implement reliable leak mitigation systems while supporting regulatory compliance.
How can HVAC manufacturers comply with IEC 60335-2-40 Annex LL requirements?
Manufacturers can support compliance by incorporating refrigerant leak detection technology capable of identifying leaks before refrigerant concentrations reach hazardous levels. TE's A3 refrigerant sensor is certified to meet IEC 60335-2-40 Annex LL requirements and helps detect R-290 at 15% of the Lower Flammability Limit (LFL) with ±2.5% accuracy and 15-second response time.
