The absolute pressure transmitter can realize the pressure measurement of degasification system, distillate dry tower, evaporator and crystallizer, etc., allowing the overpressure under 10Mpa. Absolute pressure transmitter is a new series of products specialized in vacuum measurement and control, which completely solves the difficult problem of vacuum measurement. It is widely used in pharmaceutical, medical equipment, aerospace, scientific research, leak detection, automatic equipment and other fields. Objects: liquids, gases and vapors. Absolute pressure refers to the pressure directly acting on the surface of the container or object, that is, the actual pressure under the object, its zero point is J.D vacuum, symbol is PABS (ABS is subscript). The pressure exerted by a thick layer of atmosphere on the earth's surface or on objects on it is called "atmospheric pressure" and the symbol is B. The pressure measured by pressure gauge, vacuum gauge, U-tube and other instruments is called "gauge pressure" (also called relative pressure). "Gauge pressure" takes atmospheric pressure as the starting point and the symbol is Pg. The pressure transmitter is a new type of transmitter produced by our company with the introduction of foreign technology and equipment. The key raw materials, components and parts are imported. The whole machine has been strictly assembled and tested. Because the appearance of this model is completely integrated with the current domestic popular, and is widely used two kinds of transmitter (Rosemount 3051 and Yokogawa EJA) structural advantages, give users a fresh feeling. At the same time with the traditional 1151, CECC and other products can be directly replaced in the installation, has a strong versatility and substitution ability. In order to adapt to the continuous improvement and development of domestic automation level, this series of products in addition to small and delicate design, but also launched with HART field bus protocol intelligent function. 1. High accuracy, good stability, two line system input (special can be four line system); 2. Solid components, plug type PRINTED circuit board; Small, light weight, strong vibration resistance; 3. Range, zero external continuously adjustable; Positive migration up to 500%, negative migration up to 600% 4. Damping can be too adjustable; Unidirectional overload protection feature is good; 5. No mechanical moving parts, less maintenance work; The whole series of unified structure, parts interchangeability; 6. Diaphragm material of contact medium can be selected; (316L, TAN, HAS-C, MONEL and other corrosion resistant materials) 7. Explosion-proof structure, all-weather use; Measurement range: 0 ~ 0.1Kpa to 0 ~ 40Mpa Output signal: 4 ~ 20mA DC Power supply: 12 ~ 45VDC, generally 24V power supply Field display: Pointer 0 ~ 100% scale display, LED digital display, LCD liquid crystal display optional explosion-proof grade: flameproof dIIBT4, intrinsically safe iaIICT6 Accuracy: ±0.2%, ±0.25%, ±0.5% Stability: within six months does not exceed the basic error of z.I large range J.D value isolation diaphragm: 316 stainless steel, hartz alloy C - 276, monel or vent/drain valve: 316 stainless steel, hartz alloy C, monel alloy flange and fittings: 316 stainless steel, hartz alloy C, monel alloy contact medium o-ring: nitrile rubber, fluorine rubber filling liquid: silicone oil or inert oil bolt: material: 316 l stainless steel shell Low copper aluminum alloy pressure connector: flange, NPT1/4, center distance 54mm; Joint NPT1/2 or M20×1.5 male thread ball cone seal, with joint center distance of 50.8, 54, 57.2mm (NPT taper pipe thread conforms to GB/T12716-91) Signal connection hole: G1/2