With the world preparing for the transition to A2L midly flammable refrigerants to help reduce global warming impacts from HVAC systems, air conditioning and refrigeration manufacturers have new challenges in ensuring safe operation of their products.

Gas leak detection is a key aspect of UL 60335-2-40 certification. OEMs have several options for gas sensing technologies and products for detecting A2L gas leaks. While these technologies meet may UL requirements for safety, many fall short of manufacturer requirements for lifetime, reliability, and ease of maintenance.

In addition to ensuring safe operation of a system charged with an A2L refrigerant, manufacturers are concerned with ...