This allows for the permanent record of an overpressure occurance without impairing the operation of the pressure gauge.
A permanent and safe overpressure indicator is now available on mechanical gauges. At a user-defined pressure value on the dial, a spring pin is fitted which is set to trip at 10% over this set value. Once tripped an indicator is locked into a predifined channel by the gauge pointer and can no longer be reset, providing a permanent indication of an overpressure state in the system.
Therefore it can be permanently and safely determined that the process pressure has, at least once, exceeded the predetermined set value. The gauge and case have been assembled to avoid any possibility of tampering with the mechanism.
This overload indicator is available as an option on the WIKA model 232.50.100 range of gauges.