1. Absolute pressure gauge

The absolute pressure zero position is used as a reference, and the pressure is higher than the absolute pressure zero position.

2. Positive pressure gauge

Based on atmospheric pressure (gauge pressure zero, the same below), the pressure is higher than atmospheric pressure.

3. Negative pressure (vacuum) meter

The pressure is less than the atmospheric pressure based on the atmospheric pressure.

4. Differential pressure gauge

The difference between the two pressures.

5. Gauge pressure gauge

Based on atmospheric pressure, a pressure value greater or less than atmospheric pressure.

6. Pressure gauge

Take the atmospheric pressure as the reference, used to measure the instrument that is greater than the atmospheric pressure.

7. Vacuum gauge

Take the atmospheric pressure as the reference, used to measure the instrument that is less than the atmospheric pressure.

8. Pressure vacuum gauge

Based on atmospheric pressure, it is used to measure gauges greater than and less than atmospheric pressure.

9. General pressure gauge

Pressure gauges, vacuum gauges and pressure vacuum gauges with accuracy levels equal to or lower than 1.0.

10. Install the pressure gauge directly

Pressure gauge with threaded joint.

11. Built-in (pan-mounted) pressure gauge

The shell has a supporting device, which is suitable for the pressure gauge installed on the instrument panel (screen).

12. Convex mounted (wall mounted) pressure gauge

A pressure gauge installed on the plate (screen) with the flange on the back of the housing. The entire watch protrudes in front of the disc (screen).