What is the difference between diaphragm pressure gauge and diaphragm pressure gauge

1. Different working principles:

Diaphragm pressure gauge: When the diaphragm pressure gauge is measuring the pressure, the measuring medium will directly act on the isolation diaphragm, and produce a pressure perpendicular to the diaphragm and upward, causing the diaphragm to deform, the deformation squeezes the space and causes the filling liquid in the spring tube to transfer the medium pressure to the spring tube, resulting in elastic deformation at the end of the spring tube, and the connecting rod mechanism drives the movement gear shaft to rotate. Cause the pointer to indicate the measured pressure value on the dial.

Diaphragm pressure gauge: Under the action of pressure, the measured working medium directly acts on the elastic diaphragm, the diaphragm upward (measuring positive pressure) or downward (measuring negative pressure) to produce elastic deformation, with the help of the connecting rod mechanism fixed in the center of the diaphragm to drive the movement gear shaft rotation, so that the pointer indicates the measured pressure value on the dial.

2, the difference of elastic components

Diaphragm pressure gauge: the elastic element is a spring tube, and the diaphragm only plays an isolating role.

Diaphragm pressure gauge: The elastic element of the diaphragm pressure gauge is a corrugated diaphragm. The measured pressure is applied to the diaphragm, which produces an upward (or downward) elastic deformation. The pressure value is indicated by a connecting rod mechanism welded to the diaphragm.