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Pipeline pressure sensor

A pressure sensor
Pipeline pressure sensor is the most commonly used pressure sensor in industrial practice. It is widely used in various industrial automatic control environments, including oil pipelines, water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military, petrochemical, oil wells, electricity, ships Machine tool , hydraulic machinery and many other industries.
Chinese name
Pipeline pressure sensor
Foreign name
pressure transmitter
Supply voltage
24DCV(9~36DCV)
Medium temperature
-20~85~150℃
ambient temperature
Normal temperature (- 20~85 ℃)

working principle

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The working principle of the pipeline pressure sensor is that the pressure of the medium directly acts on the diaphragm of the sensor, making the diaphragm produce a micro displacement in direct proportion to the medium pressure, making the resistance of the sensor change, detecting this change with an electronic circuit, and converting and outputting a standard signal corresponding to this pressure.

Related parameters

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Range: - 0.1~0~1~150 (MPa) Comprehensive accuracy: 0.1% FS, 0.25% FS, 0.5% FS, 1.0% FS
Output signal: 4 ~ 20mA (two-wire system), 0 ~ 5V, 1 ~ 5V, 0 ~ 10V (three wire system)
Zero point temperature drift: ≤± 0.05% FS ℃
Range temperature drift: ≤± 0.05% FS ℃
Compensation temperature: 0~70 ℃ Safety overload: 150% FS Limit overload: 200% FS
Response time: 5 mS (up to 90% FS)
Load resistance: current output type: maximum 800 Ω; Voltage output type: more than 5K Ω
Insulation resistance: more than 2000M Ω (100VDC)
Sealing grade: IP65
Long term stability: 0.1% FS/year
Vibration effect: within the mechanical vibration frequency of 20Hz~1000Hz, the output change is less than 0.1% FS
Electrical interface (signal interface): tightening nut+four core shielded wire
Mechanical connection (threaded interface): 1/2-20UNF, M14 × 1.5, M20 × 1.5, M22 × 1.5, etc. Other threads can be designed according to customer requirements

Related Attributes

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1. Sensor: device or device that can sense the specified measured signal and convert it into usable output signal according to certain rules. It usually consists of sensing elements and conversion elements.
① The sensitive element refers to the part of the sensor that can be measured directly (or responded to).
② Conversion element refers to the part of the sensor that can sense (or respond to) the north side of the sensor and convert it into electrical signals for transmission and/or measurement.
③ When the output is a specified standard signal, it is called a transmitter.     2. Measurement range: the range of the measured value within the allowable error limit.
3. Range: algebraic difference between the upper and lower limits of the measurement range.
4. Accuracy: the consistency between the measured result and the true value.
5. From repeatability: under all the following conditions, the degree of conformity between the results of multiple consecutive measurements of the same measured quantity:
6. Resolution: the minimum change that the sensor can detect within the specified measuring range.
7. Threshold: the minimum measured change that can make the sensor output generate measurable change.
8. Zero position: make the absolute value of the output the minimum, such as the balance state.
9. Excitation: external energy (voltage or current) applied to make the sensor work normally.
10. Maximum excitation: the maximum excitation voltage or current that can be applied to the sensor under urban conditions.
11. Input impedance: the impedance measured at the input end of the sensor when the output end is short circuited.
12. Output: the electricity generated by the sensor and measured as a function of the external force.
13. Output impedance: the impedance measured at the output end of the sensor when the input end is short circuited.
14. Zero point output: under the urban conditions, the output of the sensor when the measured value is zero.
15. Hysteresis: the maximum difference in the output when the measured value increases and decreases within the specified range.
16. Late: time delay of output signal change relative to input signal change.
17. Drift: In a certain time interval, the sensor output is finally measured as an irrelevant and unnecessary change.
18. Zero drift: change in zero output at specified time interval and under indoor conditions.
19. Sensitivity: the ratio of sensor output increment to corresponding input increment.
20. Sensitivity drift: the change in the slope of the calibration curve caused by the change in sensitivity.
21. Thermal sensitivity drift: sensitivity drift caused by sensitivity change.
22. Thermal zero drift: zero drift caused by ambient temperature change.
23. Linearity: the degree to which the calibration curve is consistent with a certain regulation.
24. Nonlinearity: the deviation degree of the calibration curve from a specified straight line.
25. Long term stability: the sensor can still keep the allowable error within the specified time.
26. Natural frequency: free (without external force) oscillation probability of the sensor without resistance.
27. Response: characteristics of measured changes during output.
28. Compensation temperature range: the temperature range compensated by the zero balance within the range and specified limit of the sensor.
29. Creep: the change of output within the specified time when most of the environmental conditions of the measured machine remain constant.
30. Insulation resistance: unless otherwise specified, it refers to the resistance value measured between the specified insulation parts of the sensor when the specified DC voltage is applied at room temperature.