Pressure gauge accessories are mechanical devices used in the hook up of a pressure gauge or transmitter to minimise any potentail damage to the pressure measuring instrument from the process fluid being measured. Pressure gauges and differentail pressure instruments are mechanical pressure measuring instruments used to measure gauge pressure, absolute pressure or differential pressure. Although relatively robust, they are susceptible to damage from the process being measured e.g. too much pressure, extreme temperatures, pulsating pressure etc. To help mitigate the likliehood of damage pressure gauge manufacturers and suppliers offer a wide range of accessories that can be installed with the gauge.

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