Gauge table by the sensitive element (Bourdon tube, diaphragm, bellows) of elastic deformation, then the inner movement conversion mechanism will be conducted to the pressure deformation pointer, the pointer is rotated to cause the display pressure. Pressure expressed in two ways: one is absolute vacuum as reference pressure indicates, is called absolute pressure; the other is the atmospheric pressure expressed as a pressure reference, known as the relative pressure. Since most pressure measurement instruments measured pressure is relative pressure, it is also called the relative pressure gauge pressure. When the absolute pressure is less than atmospheric pressure, absolute pressure available is less than one atmosphere inside the container value to represent. Called "vacuum level." Their relationship is as follows: Absolute pressure = atmospheric pressure + relative pressure vacuum degree = atmospheric pressure - absolute pressure gauge national standards, "the general pressure gauges" GB / T1226-2001 in 4.1.2 meter by threaded joints and installation is divided into: Direct mounting pressure gauge, fitted (panel mounted) pressure gauge, projection equipment (wall mounted) pressure gauge. Use ordinary temperature gauge: -40 ℃ ~ 70 ℃ ordinary gauge performance standards: GB / T1226-2001 use Ordering Information: working environment should be non-corrosive gases. Y-100 Shelf ordinary gauge Xi'an Xi'an cloud Instrument Related Products Ordering Instructions: 1, ① product name and model; ② nominal diameter: ③ product pressure; ④ Material; ⑤ use media; ⑥ product temperature; ⑦ with attachments. So that we can correct for your selection. 2. Please indicate any special requirements when ordering products. 3, if the unit has been selected by the design model, press model directly to our Sales Department Order. 4, when the occasion is very important or the environment is more complicated, you try to provide design drawings. Welcome to visit our website if you have any questions you can call us, we will try our best to provide you with quality services. Phone: 18109293579 Lee Website: http: //www.369yb.com