Swichgage instruments are high-quality diaphragm-actuated, dial gauges for various with built-in electrical switches.
Used for tripping alarms and/or shutdown devices, the pointer acts as both an indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact.
Contacts have a self-cleaning motion to ensure electrical continuity.
More compact, gauge-only models without contacts (known as Murphygage instruments) are also available.
20DP / 25DP / A20DP / A25DP SERIES DIFFERENTIAL PRESSURE SWICHGAGE
The 20DP and A20DP Series (2 inch/51 mm dial) and the 25DP and A25DP Series (2 1/2 inch/64 mm dial) Swichgage instruments are diaphragm-actuated, differential pressure-indicating gages with a built-in electrical switch.
This switch is used for tripping alarms and/or shutting down equipment. These gages are intended to monitor and indicate oil, fuel or water filter restriction and can reduce the risk of dangerously high pressure which may rupture the filter, resulting in contaminants entering the system.
