Bifilar pressure gauges are primarily used on locomotive vehicles for measuring the pressure of hydraulic systems or gas cylinders, and can also be used for measuring the pressure of various non-corrosive, non-crystalline, and non-solidifying media, such as copper alloys and tin-lead solders. These gauges can simultaneously measure two pressures, either the same or different (the difference should generally not exceed one-third of the scale range limit).

Structural Principles

1. The double needle pressure gauge consists of two independent measurement systems and indicator devices.

2. The working principle of the double-needle pressure gauge is based on the elastic deformation of the elastic element (spring tube in the measuring system). That is, under the pressure of the measured medium, it forces the ends of the two spring tubes to produce corresponding displacements. With the help of a tie rod, this wheel transmission mechanism transmits and amplifies it, and the red and black pointers fixed to the wheel shaft indicate the two measured values on the scale disk.