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Diaphragm pressure gauges are suitable for measuring the pressure or negative pressure of various fluid media that are corrosive, non solidifying, or non crystalline. The corrosion resistance of diaphragm pressure gauges depends on the diaphragm material.
The diaphragm pressure gauge consists of a measuring system (including flange joints, corrugated diaphragms), a transmission indicator mechanism (including connecting rods, gear transmission mechanisms, pointers, and dials), and a housing (including a case and cover ring). The shell is a splash proof structure with good tightness, which can protect its internal structure from contamination.

●Structural principle

The diaphragm pressure gauge is based on the deformation of the elastic element (diaphragm on the measuring system). Under the pressure of the measured medium, the diaphragm pressure gauge forces the diaphragm to produce corresponding elastic deformation displacement. With the help of the connecting rod group and the transmission mechanism, the measured value is amplified and indicated on the dial by the pointer fixed on the gear.

●Main technical instructions

Accuracy level: 2.5
Operating environment temperature: -40 to+70 ℃; Relative humidity not exceeding 90%
Temperature effect: When the temperature deviates by 20 ± 5 ℃, the additional temperature error shall not exceed 0.04%/℃
Working position: Vertical installation.
Shell protection level: IP64

Scale range, external dimensions, and weight

*The dimension D1 of the pressure bearing part with specifications of 0-40, -40 to 0, and ± 20KPa is diameter 85

The materials of the main components such as the pressure guiding system and housing of the diaphragm pressure gauge