Dwyer Instruments 1820-0 Differential Pressure Switch

The Dwyer Instruments 1820-0 differential pressure switch is a compact, enclosure-protected device designed to monitor low differential pressure. Model 1820-0 is described as a low differential pressure switch with enclosure, providing a protected sensing chamber and secure electrical connections for reliable operation in constrained spaces. As a Dwyer Instruments product, the unit measures the pressure difference between two ports and outputs a switch signal when the differential pressure reaches its preset threshold, enabling simple control, signaling, or interlock logic. The built-in enclosure shields the internal components and supports installation in challenging environments where a compact form factor and protection matter. The 1820-0 designation identifies this specific configuration within Dwyer’s range of differential pressure switches, offering a durable, straightforward option for monitoring small pressure differences with a protected enclosure.