Using a digital manometer and a multimeter

200 BTU applications

A degraded o-ring typically causes "hunting" during the ignition sequence

supporting AC units up to 5

Dwyer Instruments 1910-5 Pressure Switch R-448A Using a digital manometer andThe Dwyer Instruments 1910 5 Pressure Switch is a professional grade solution for monitoring low differential pressure in HVAC systems and industrial processes. This Series 1900 compact pressure switch features an adjustable set point range of 1. 40" to 5. 5" w. c., providing precise control for air filter monitoring and fan status indication. Built with a Single Pole Double Throw (SPDT) configuration, this switch allows for flexible wiring to