Dwyer Instruments, Inc. 1820-2B Pressure Switch is a pressure-switch device identified by model number 1820-2B (also cataloged as 18202B). It senses system pressure and actuates electrical contacts when the set pressure is reached, enabling control logic, alarms, or safety interlocks in industrial or commercial equipment. The 1820-2B designation distinguishes this model within Dwyer’s pressure switch lineup and supports use in instrumentation, process control, and systems where reliable pressure monitoring is essential.
