Thread Content
Many people tend to confuse pressure sensors with pressure transmitters; in fact, they are two different concepts. Pressure sensors generally refer to component-level products that output non-standard mV signals; they are the core components of pressure transmitters. Due to the non-standard nature of these signals, users need to perform pressure calibration and design specialized signal processing circuits when using them ； Due to the weak signal, an amplifier needs to be added at longer distances ； In a literal sense, a pressure transmitter also belongs to the category of pressure sensors. However, its output signal is a standard, universal type of signal such as 4–20 mA or 1–5 V; such signals can be transmitted over long distances. The pressure value has already been calibrated, and users can use it simply by setting the range of the instrument. The difference between a transmitter and a sensor is that a sensor consists of two parts: the sensitive element and the conversion element. The sensitive element is the part of the sensor that is capable of directly detecting or responding to the quantity being measured ； A conversion element refers to the part of a sensor that transforms the quantity being measured, as detected or sensed by the sensitive element, into an electrical signal suitable for transmission or measurement. Since the output signal of a sensor is usually very weak, it needs to be modulated and amplified. With the development of integration technology, the circuitry and power supply circuits are also incorporated within the sensor. In this way, the sensor can produce signals that are easy to process and transmit