Dwyer Instruments 1823-0 Differential Pressure Switch

Dwyer Instruments 1823-0 Differential Pressure Switch is a compact device that senses a differential pressure and actuates an electrical output when the sensed difference reaches the set point within the 0.15–0.5 in WC (inches of water column) range. It uses a 1/8 in NPT connection for straightforward installation into ducts, piping, or instrumentation ports, making it suitable for integrating into control or monitoring circuits that respond to low differential pressures. The 1823-0 designation identifies this specific Dwyer model among its line of differential pressure switches, which are designed for reliable actuation at small pressure differentials. With its low-differential range, the switch is intended to provide a clear, repeatable signal in compact installations where precise threshold detection is required to drive automation or alert signaling.