Pressure sensors are widely used in industrial production processes. Shenzhen Toprie Electronics Co., Ltd. has compiled the following professional terms and explanations related to pressure sensors for reference.

① Sensor

A sensor is a device or instrument that detects a specified physical quantity and converts it into a usable output signal according to a defined principle. The English terms are sensor and transducer. A sensor typically consists of a sensing element and a conversion element.

② Pressure Transmitter

When the output of a sensor is converted into a specified standard signal, it is generally referred to as a transmitter. When the measured quantity is pressure, it is called a pressure transmitter or pressure sensor.

③ Absolute Pressure

Absolute pressure refers to pressure measured relative to a perfect vacuum. Absolute pressure uses absolute vacuum as its reference point and is represented by PABS. It is commonly referred to as absolute pressure.

④ Gauge Pressure

Gauge pressure refers to pressure measured relative to the local atmospheric pressure.

When the gauge pressure is positive, it is commonly referred to simply as pressure. When the gauge pressure is negative, it is commonly called negative pressure or vacuum. The greater the absolute value of negative pressure, the lower the absolute pressure and the greater the vacuum level.

⑤ Differential Pressure

When two different pressures are simultaneously applied to the two pressure ports of a pressure sensor or pressure transmitter, the difference between the two pressures is called differential pressure.

Technical Parameters Related to Pressure Transmitters and Pressure Sensors

⑥ Measurement Range

The range of measured values within which the sensor operates within its specified permissible error limits is called the measurement range.

⑦ Upper Limit

The highest value within the sensor's measurement range is called the upper limit.

⑧ Lower Limit

The lowest value within the sensor's measurement range is called the lower limit.

⑨ Span

The span is the algebraic difference between the upper and lower limits of the transmitter's measurement range.

Span = Upper Limit − Lower Limit

⑩ Accuracy

Accuracy refers to the degree of agreement between the measured result and the true value of the quantity being measured.

⑪ Repeatability

Repeatability refers to the consistency between multiple consecutive measurement results obtained by a pressure transmitter when measuring the same quantity under the same measurement conditions.

⑫ Creep

Creep refers to the change in a sensor's output over a specified period of time while the measured quantity and all environmental conditions remain constant.

⑬ Hysteresis

Hysteresis refers to the maximum difference in sensor output when the measured value is increased and decreased within the specified measurement range.

⑭ Excitation

Excitation refers to the external energy applied to enable a sensor to operate normally, typically in the form of voltage or current.

Parameters such as the sensor output may vary depending on the applied voltage or current. Therefore, parameters such as the zero-point output, upper-limit output, and drift of a pressure transmitter should be measured under specified excitation conditions.

⑮ Zero Drift

Zero drift refers to the change in the sensor's zero-point output over a specified time interval under standard conditions.

When zero drift is caused by changes in the surrounding temperature, it is referred to as thermal zero drift or temperature-induced zero drift.

⑯ Overload

Overload generally refers to the maximum measured value that can be applied to a pressure sensor or pressure transmitter without causing permanent changes to its performance characteristics.

⑰ Stability

Stability refers to the ability of a pressure sensor or pressure transmitter to maintain its original characteristic parameters after being stored, tested, or operated under specified conditions for a specified period of time.

⑱ Reliability

Reliability refers to the ability of a sensor or transmitter to perform its required functions under specified conditions for a specified period of time.

How to Choose a High-Quality Pressure Transmitter

When selecting a pressure transmitter, users should consider stability, reliability, and low temperature drift as key technical indicators for evaluating product quality.

The good reputation of TOPRIE pressure transmitters in the market is not only based on their high measurement accuracy, but also on their outstanding performance in terms of long-term stability, reliability, and low temperature drift.

Accuracy is often prominently highlighted in manufacturers' product selection materials. However, high accuracy alone does not necessarily mean that a pressure transmitter is of high quality.

In actual applications, users are often more concerned about whether a product can operate stably over the long term, maintain high reliability, and minimize temperature drift. Products with these characteristics can significantly reduce the workload associated with on-site instrument maintenance.

If you are interested in high-stability pressure sensors, please click the consultation button on the right to contact us.