Differential pressure switch detect quickly flow in the heat exchanger. They are extremely reliable since they are not affected by dirt and have no flow restriction.
It can be installed on any pipe size. One size fits all.
Compressor protectionConnect in series before the compressor contactor.- Water source heat pump- Water load coolingIf using reversible water to water heat pump then 2 flow switches in series should be installed for complete protection on each side.
Specification Flow Switch: 0.5gal/min (1l/min)Contact Rating: 500W Material: Brass Cable: 20/2 - 10ft (3m)Connection: 1/4" NPT