Dwyer Instruments 1823-W42G Mechanical Pressure Switch

The Dwyer Instruments 1823-W42G Mechanical Pressure Switch is a rugged, mechanical pressure-actuated switch designed to monitor pressure and actuate control circuits in industrial equipment. It features SPDT switching contacts and a field-adjustable set point for reliable on/off control across process pressures. Sensing media include air, gas, and compatible fluids, and it supports panel or equipment mounting in an industrial-duty enclosure with an industrial-pressure port connection. Applications include HVAC installations, compressed air systems, industrial pumps, hydraulic power units, process control equipment, and broader automation systems; it is commonly used by system integrators and maintenance teams for replacement, retrofit, and preventive maintenance to protect equipment and maintain process performance. Common replacements include Dwyer Series 1620, AP, and 1950 pressure switches.