Products
Diffusion silicon pressure transmitter with advanced technology imported ceramic sensors, coupled with high-precision electronic components, assembled by the strict requirements of the process. Pressure transmitter with the use of conventional pressure transmitters, compared with two significantly different technical differences: First, the measuring element using emerging high-precision ceramic materials; Second, the measuring element is no intermediary liquid, is solid.
Product Features:
The main features of the pressure transmitter anti-overload and shock resistance, overpressure up to several times the range, and even with hard objects directly hit the measuring element does not lead to its damage, and no effect on the measurement accuracy;
High stability, better than 0.1% of full scale per year, this technical indicator has reached the level of intelligent pressure instrumentation; temperature drift is small, due to the elimination of the intermediary fluid in the pressure measurement element, so the sensor not only obtains a very high measurement accuracy, and by the temperature gradient is very small;
The pressure transmitter is widely applicable, easy to install and maintain, and can be installed in any position.
Technical parameters:
Pressure transmitter main technical indicators
Measuring range: -100KPa～60MPa
Precision level: 0.1 level, 0.2 level, 0.5 level
Ambient temperature: -40 ~ 70 ℃
Medium temperature: -40～125℃ (temperature compensation -20～80℃)
Long-term stability: better than 0.1% F.S/year
Operating voltage: 12.5～36VDC -AC220v
Output signal: 4-20mA (2-wire) 0/1-5VDC (3-wire)
Range migration: can do standard range 10:1 migration
Vibration effect: any axis, 200Hz/g for 0.01% F.S.
Transmitter protection grade: IP65
Explosion-proof: iaⅡCT4, intrinsically safe type
Related equipment: LB802
Material: molded cast aluminum shell
Diaphragm is 96% alumina ceramic
Process connectors are 316L stainless steel
Seals: Buna-N, Silicone Rubber, Fluorine Rubber
-Precision grade: 0.25 grade basic error ± 0.25%
Non-linear error: 0.3 grade ≤±0.3%FS
-Hysteresis error: ≤±0.3%FS
-Output characteristics:
①0-10mA output, load resistance 0-15KΩ
②4-20mA output, load resistance 0-600Ω
③ Constant current output internal resistance greater than 10MΩ
④ 2-wire 4-20mA output: standard power supply DC24V
Explosion-proof symbol: (RPT-Ⅲ): Exia Ⅱ CT4-6
Features of diffusion silicon pressure transmitter
High precision, accuracy up to 0.1%FS, external zero and fullness adjustment is optional, suitable for measuring low-pressure range.
Strong overload pressure.
Working principle:
Transmit the pressure signal to the electronic equipment, and then display the pressure in the computer.
The principle is roughly:
The mechanical signal of water pressure is converted into an electronic signal such as current (4-20mA).
Pressure and voltage or current size into a linear relationship, generally proportional relationship.
Therefore, the transmitter output voltage or current with the increase in pressure and increase.
This leads to a relationship between pressure and voltage or current:
The two pressures of the measured medium of the pressure transmitter are passed into the high and low pressure chambers, and the pressure of the low-pressure chamber adopts atmospheric pressure or vacuum, which acts on the isolation diaphragms on both sides of the δ-element (i.e., the sensitive element), and then transmits to the two sides of the measurement diaphragm through the isolation piece and the filling liquid inside the element. The pressure transmitter is a capacitor consisting of a measuring diaphragm and electrodes on each side of the insulating sheet. When the two sides of the pressure is not consistent, resulting in the measurement of diaphragm displacement, its displacement and pressure difference is proportional to the two sides of the capacitance is not equal, through the oscillation and demodulation link, converted into a signal proportional to the pressure.
Diffusion silicon pressure transmitter can be used with various types of moving-coil indicator, digital pressure gauge, electronic potential difference meter, pressure transmitter can also be used with a variety of automatic adjustment system or computer system.
Working Principle
Diffusion silicon pressure transmitter through the temperature sensor to the temperature signal into an electrical signal, and then by the preamplifier to amplify the electrical signal filtering, sent to the CPU's A/D converter module for analog to digital conversion, and finally by the CPU for data processing and display and PWM output.
