There are many types of pressure gauges, not only general (ordinary) pointer indication type, but also digital type; not only conventional type, but also special type; not only the contact type, but also the long-distance type; not only the earthquake-resistant pressure gauge, but also Seismic pressure gauge; not only diaphragm pressure gauges, but also corrosion resistant pressure gauges.
The pressure gauge series is complete. It not only has a regular series, but also a digital series; not only the general media application series, but also the special media application series; not only the switching signal series, but also the remote signal series, etc., all of which originate from practical needs, have formed Complete series.
The specifications and models of the pressure gauge are complete and the structure is perfect. From the nominal diameter, there are Φ40mm, Φ50mm, Φ60mm, Φ75mm, Φ100mm, Φ150mm, Φ200mm, Φ250mm and so on.
Seen from the installation structure type, there are direct mounting type, embedded type and convex type, wherein the embedded type is divided into radial embedded type and axial embedded type, and convex type also has radial convex type and axial direction. Convex type. Directly mounted, it is divided into radial direct mounting and axial direct mounting. Among them, the radial direct installation type is a basic installation type, and generally refers to a radial direct installation type when the installation structure type is not specified. The axial direct mounting type considers the stability of its own support and is generally only used on pressure gauges with a nominal diameter of less than 150 mm. The so-called embedded and convex pressure gauges are the belt side (mounting ring) pressure gauges we often say. The axially embedded type has both the axial front band edge and the radial insert type, which means the radial front band edge and the radial convex type (also called wall type) refers to the radial rear band edge pressure gauge.
From the range and the range section, the pressure gauge is divided into the micro-pressure range section in the positive pressure range.
Low-pressure range section, medium-pressure range section, high-pressure range section, and ultra-high-pressure range section, each measurement section is subdivided into several measurement ranges (meter range); in the negative pressure range (vacuum) There are three kinds of negative pressure (vacuum gauge); the pressure gauge of positive pressure and negative pressure is a cross-domain pressure gauge. Its specification name is pressure vacuum gauge, also known as vacuum pressure gauge. It can measure not only positive pressure but also negative pressure.
The classification of the accuracy of the pressure gauge is very clear. Common accuracy levels are 4, 2.5, 1.6, 1, 0.4, 0.25, 0.16, 0.1, and so on. The accuracy level should generally be marked on its dial, and its logo is also specified. For example, “1” indicates that its accuracy level is level 1. For some pressure gauges with very low precision grades, such as those under Class 4, there are some that do not need to measure the exact pressure value. Only the pressure range is indicated. For example, the pressure gauge on the fire extinguisher can not mark the accuracy grade. .
