World Magnetics PSF 102 Pressure Switch

The World Magnetics PSF 102 is a compact SPST (Normally Open) pressure switch built for precise low-pressure sensing in HVAC, pneumatic control, and industrial airflow systems. This sensing device provides switching for pressure, vacuum, and differential pressure with a range from 0.03 in H2O to 25 psi, configurable by port type and diaphragm options, uses gold contact points for reliable operation, and employs a polyurethane diaphragm (with optional Teflon) housed in polycarbonate, with spade terminals or optional PCB terminals. Operating specs include AC/DC 30 V maximum resistive load, up to 40 mA resistive current, a mechanical life greater than 20 million cycles, and port configurations that include smooth, barbed, NPT, and flow-through arrangements, plus a temperature range of +40°F to +150°F. Commonly installed in HVAC airflow systems, industrial ventilation, clean rooms, dust collection and air filtration setups, or pneumatic automation where accurate low-pressure detection is critical, the PSF 102 supports maintenance and automation workflows such as airflow proving, filter monitoring, replacement maintenance, and automated pressure control.