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 and the use of conventional pressure transmitter compared to 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.
Technical parameters.
Pressure transmitter main technical indicators
Measuring range: -100KPa～60MPa
Accuracy grade: 0.1 grade, 0.2 grade, 0.5 grade
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%
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accuracy
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0.1%F·S 0.25%F·S 0.5%F·S
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Measurement range
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-95KPa~35MPa
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Measuring medium
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Liquids, gases, vapors
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storage temperature
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-40℃~125℃
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operating temperature
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-10℃~80℃
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antiseptic material
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316L Stainless Steel Ceramic PTFE
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temperature effect
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<0.02%/℃
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load resistance
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≤750Ω
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overload capacity
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1~2 times of range
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mechanical protection
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IP65
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humidity level
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≤95%RH
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exports
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2-wire 4~20mA DC
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Associated Equipment
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EXZ231B Safety Encoder
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weights
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<1Kg
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Zero Temperature Coefficient
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Less than 0.02%/°C
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Full range temperature coefficient
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Less than 0.02%/°C
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Supply Voltage
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24V DC
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Explosion-proof grade
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iaⅡCT5
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mounting position
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unaffected
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Principle of operation.
Transmit the pressure signal to an electronic device, which in turn displays the pressure in a computer.
The principle is roughly:
The mechanical signal of water pressure is converted into a current (4-20mA), which is an electronic signal.
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. The block diagram is as follows:
The side of the medium ---> sensor ---> electronic circuit ---> output signal
The pressure of the measured medium acts directly on the sensor's ceramic / diffusion silicon diaphragm / on the diaphragm to produce a small displacement proportional to the medium pressure, under normal operating conditions, the diaphragm **** displacement of not more than 0.025 mm, the electronic circuit detects this displacement, that is, this displacement is converted into a standard industrial measurement signal corresponding to this pressure. Overpressure when the diaphragm is directly attached to the solid ceramic substrate / diffusion silicon, because the gap between the diaphragm and the substrate is only 0.1 mm, so overpressure diaphragm *** displacement can only be 0.1 mm, so from the structure to ensure that the diaphragm will not produce too large a deformation, the sensor has a very good stability and high reliability.
