It features durable construction but is rated for NEC Class 2 "not wet" environments

which uses mineral oil

this dual-voltage flow switch operates seamlessly on 120V and 240V electrical circuits

For liquid applications

Carrier KH43LG073 Filter Drier 320735-701 It features durable construction butThe Carrier KH43LG073 is a Factory Authorized Part designed specifically for the liquid line of residential and commercial HVAC units. This liquid line filter drier features a high capacity 8 cubic inch desiccant volume, providing essential protection against moisture, acid, and solid contaminants that can lead to compressor failure or thermal expansion valve (TXV) blockage. With 3 8" sweat (ODF) copper connections, this Uni Flo filter drier ensures a