Description Piston type dead weight pressure tester gauge weights

Deadweight tester (DWT) is a calibration standard which uses a piston cylinder on which a load is placed to make an equilibrium with an applied pressure underneath the piston.Deadweight testers are so called primary standards which means that the pressure measured by a deadweight tester is defined through other quantities; Length, mass and time.Typically deadweight testers are used in calibration laboratories to calibrate pressure transfer standards like electronic pressure measuring devices.



Struture principle Piston type dead weight pressure tester gauge weights

Measuring instrument of pressure gauge is the application of static pressure balance principle: namely the piston itself and in the special weight weight (G) on the piston effect on the piston area (S) produced by the pressure (P) and hydraulic pressure vessel pressure generated by the phase equilibrium, to determine the pressure of checking instrument size: P = G/S In type G = mg (m: method of code quality, G: acceleration of gravity) products factory use standard gravitational acceleration G value. When users are using g value shall be determined according to the local acceleration of gravity, and according to the calculated value correction weight g weight. Pressure gauge is by checking pump (pressure system) and the piston part (pressure) measurement system of two parts.

Features Piston type dead weight pressure tester gauge weights

The piston and the piston barrel are made of alloy steel, tungsten carbide and other materials with high strength, high hardness and low temperature linear expansion coefficient. The temperature expansion coefficient is small and the deformation is small, thus ensuring that the effective area of the piston has a small periodic rate of change to ensure the piston pressure. With extremely high sensitivity.


Model Piston type dead weight pressure tester gauge weights