The differences between sensors
Release Time:
2025-11-01
We’ve used various models of force sensors, but the transmitters have remained largely unchanged. A pressure sensor detects pressure signals—typically referring to a primary instrument. In contrast, a pressure transmitter integrates both the primary and secondary instruments, converting the detected signal into a standardized output, such as 4–20 mA, 0–20 mA, or 0–5 V/0–10 V. You can think of it this way: the sensor “feels” the input signal, while the transmitter not only senses it but also “transforms” it into a standard signal before “sending” it out. A six-axis force sensor usually refers to a sensitive element that converts varying pressure signals into corresponding changes in resistance or capacitance—for example, piezoresistive or piezocapacitive elements. Meanwhile, a pressure transmitter generally consists of a pressure-sensitive component paired with a signal-conditioning circuit, forming a complete measurement unit. This setup typically delivers a standard voltage or current signal directly proportional to the applied pressure, making it ready for easy integration with instruments, PLCs, data acquisition cards, and other devices.
Pressure is a critical process parameter in consumption processes as well as in the aerospace, aviation, and defense industries. It not only requires rapid, dynamic measurement but also demands that the measurement results be digitally displayed and recorded. In automated systems of large-scale refineries, chemical plants, power plants, and steel mills, pressure parameters must also be transmitted over long distances. Moreover, these systems often need to convert pressure—and other related parameters such as temperature, flow rate, and viscosity—into digital signals for input into computers. Among all sensors, pressure sensors are receiving significant attention and are rapidly advancing in development. The current trends in pressure sensor technology focus on further enhancing dynamic response speed, improving accuracy and reliability, and enabling digitalization and智能化 (smartification). Commonly used pressure sensors include capacitive pressure sensors, variable reluctance pressure sensors, Hall-effect pressure sensors, fiber-optic pressure sensors, and resonant pressure sensors, among others.
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