This apparatus enables a commercial Bourdon tube pressure gauge to be accurately calibrated using a dead weight tester. Usual practice is to load gauges using oil to transmit the known pressures; however. For ease of use and cleanliness in operation, this apparatus is specially deigned for use with water instead of oil.
This equipment consists of a stainless piston which is free to move vertically in a closely fitting cylinder. A transparent flexible hose connects the cylinder to the pressure gauge. Its internal mechanism is clearly visible through the transparent dial.
Integral with the piston is a loading platform upon which known weights are placed during the test. All air is expelled from the system by tilting and gently tapping the cylinder.