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Power definition: the concept of pressure here, actually refers to the physics of pressure, that pressure per unit area on the size.
Absolute Pressure: Absolute pressure to zero as the base, higher than the absolute pressure of zero pressure.
Pressure: the atmospheric pressure as the base, the pressure above atmospheric pressure.
Negative pressure (vacuum): the atmospheric pressure as the base pressure lower than atmospheric pressure.
Differential pressure: the pressure difference between the two. Gauge: the atmospheric pressure as the base, greater than or less than atmospheric pressure pressure.
Gauge: the atmospheric pressure as a benchmark for measuring atmospheric pressure is less than or greater than the instrument. Gauges: industrial process control and technical measurement process, due to the flexibility of mechanical pressure gauge sensing element with high mechanical strength and the production of convenient features, making the mechanical pressure gauge to be more widely used. Flexibility in the mechanical pressure gauge with pressure-sensitive element changes due to elastic deformation. Mechanical pressure gauge spring-tube (Bourdon tube), diaphragm, diaphragm and bellows and other sensitive components, and in this classification. The pressure is generally measured as the relative pressure. Click to atmospheric pressure relative to the general. Elastic components in the medium under pressure generated by elastic deformation, through the gear transmission amplification pressure gauge, pressure gauge will show the relative value relative to atmospheric pressure (or high or low).
Classification of pressure gauge: pressure gauge according to their measurement accuracy, precision pressure gauge can be divided into the general pressure gauge.
Precision pressure gauge measuring accuracy levels were 0.25,0.4 level; general gauge of the level of measurement accuracy were 1.0,1.6,2.5,4.0 level. Gauge the size of its nominal diameter casing, commonly used ¢ 40, ¢ 50, ¢ 60, ¢ 75, ¢ 100, ¢ 150, ¢ 200, ¢ 250mm.
Gauge its installation can be installed directly into the radial, axial direct installation, radial front with side installation, the radial band edge after installation, before the band edge axial installation pressure gauge at the direction of the base of different , divided into general pressure gauge, absolute pressure gauge, pressure gauge. General pressure gauge to atmospheric pressure as a benchmark; absolute zero absolute pressure table basis; differential pressure gauge measuring the pressure difference between two measured.
Gauge of their range, divided into the vacuum table, pressure vacuum gauge, micro-pressure tables, low tables, tables and high pressure in the pressure table. Vacuum gauge for measuring the pressure less than atmospheric pressure; pressure vacuum table can be used for simultaneous measurement of less than and greater than atmospheric pressure, pressure; micro-pressure gauge for measuring the pressure value is less than 60K Pa; low table with to measure the 0 ~ 6MPa pressure; the pressure gauge used to measure 10 ~ 60MPa pressure; high above the table used to measure the pressure 100MPa.
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