Principle:
Henry DTB Series deadweight tester is based on the fundamental pressure principle:
P = F/A
where pressure (P) is defined as the product of the downward force (F) of the weights when applied to the effective area (A) of the ball within the nozzle. Air source supplies input pressure through the built-in flow regulator. It makes the ball float up within the tapered section of the nozzle and gas escapes past the ball and returns through the dynamic stabilization regulator (pressure output). The ball is self-centralized in its position by the flowing past gas, ensuring the ball without contacting the nozzle. Adding or removing weights causes the ball falling or rising, affecting the gas flow. The flow regulator sense the change and adjusts the pressure to
bring the system back into equilibrium.