Features and Related Parameters of Pressure Transmitters
Pressure transmitters are one of the most commonly used sensors in industrial practice, widely applied in various industrial automation environments, including oil pipelines, hydropower, railway transportation, and intelligent building control systems. The working principle of a pressure transmitter is that pressure directly acts on the sensor's diaphragm, causing a micro-displacement proportional to the medium pressure. This displacement changes the sensor's resistance, which is detected by an electronic circuit and converted into a standard signal corresponding to the pressure.
The features of pressure transmitters include the following:
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Capable of measuring hydraulic and pneumatic pressure.
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Standard threaded pressure measurement method.
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Full stainless steel structure with an IP68 protection rating.
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Measurement accuracy up to 0.1 class.
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Output options include analog (4~20mA, 0-5V, 0-10V) and digital (RS485).
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Threaded interfaces can be customized according to requirements.
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Measuring range can be customized according to requirements.
Related Parameters of Pressure Transmitters:
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Sensor Core: The sensor core is the most important part of a pressure transmitter. A sensor is a device or mechanism that can sense a specified measured quantity and convert it into a usable output signal according to a certain rule. It usually consists of a sensitive element and a transducer element.
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Measuring Range: The range of measured values within the allowable error limit.
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Accuracy: The degree of consistency between the measured result and the true value.
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Repeatability: The degree of consistency among the results obtained from multiple consecutive measurements of the same quantity under the same conditions.
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Resolution: The smallest change in the measured quantity that the sensor can detect within the specified measurement range.
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Threshold: The smallest change in the measured quantity that can cause a detectable change in the sensor's output.
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Zero Position: The state in which the output's absolute value is minimized, such as a balanced state.
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Excitation: The external energy (voltage or current) applied to enable the sensor to function properly.
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Maximum Excitation: The maximum value of excitation voltage or current that can be applied to the sensor under specified conditions.
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Input Impedance: The impedance measured at the input terminals of the sensor when the output terminals are short-circuited.
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Output Impedance: The impedance measured at the output terminals of the sensor when the input terminals are short-circuited.
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Zero Output: The output of the sensor when the measured quantity is zero under specified conditions.
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Hysteresis: The maximum difference in the output when the measured quantity increases and decreases within the specified range.
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Drift: The unwanted change in the sensor's output over a certain time interval that is independent of the measured quantity.
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Zero Drift: The change in zero output over a specified time interval under specified conditions.
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Zero Temperature Drift: The zero drift caused by changes in ambient temperature.
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Linearity: The degree of consistency between the calibration curve and a specified straight line.
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Long-term Stability: The ability of the sensor to maintain its output within the allowable error range over a specified period.
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Natural Frequency: The free (unforced) oscillation frequency of the sensor in the absence of damping.
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Response: The characteristic of the output change in response to a change in the measured quantity.
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Compensation Temperature Range: The temperature range over which the sensor is compensated to maintain its range and zero balance within specified limits.
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Creep: The change in output over a specified time period when the measured quantity and environmental conditions are kept constant.
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Insulation Resistance: Unless otherwise specified, it refers to the resistance measured between specified insulated parts of the sensor when a specified DC voltage is applied under room temperature conditions.
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