The difference between pressure sensors and pressure transmitters: Pressure sensors typically 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 the signals, users need to perform pressure calibration and design dedicated signal processing circuits when using them. Because the signals are weak, amplifiers need to be added when the distance is long. Pressure transmitters are also pressure sensors in a literal sense, but their output signals are standard and universal, such as 4~20mA, 1~5V, etc. They can be transmitted over long distances and can be matched with standard instruments. At the same time, their pressure values have already been calibrated, and users only need to set the range of the instrument to use them.
The difference between a transmitter and a sensor:
With the advancement of technology, the meanings of some technical terms have changed, often leading to misunderstandings. The term "sensor" is a case in point.
Nowadays, the sensors people talk about are composed of two parts, namely the sensitive element and the transducer element. The sensitive element refers to the part in the sensor that can directly sense or respond to the measured quantity; the transducer element refers to the part in the sensor that converts the measured quantity sensed or responded by the sensitive element into an electrical signal suitable for transmission or measurement. Since the output signal of the sensor is generally very weak, it needs to be modulated and amplified. With the development of integrated technology, people have also installed this part of the circuit and power supply circuits inside the sensor. In this way, the sensor can output a usable signal that is convenient for processing and transmission.
In the past when technology was relatively backward, the so-called sensor referred to the sensitive element mentioned above, while the transmitter was the conversion element. There are many types of transmitters. The transmitters used in industrial control instruments mainly include temperature transmitters, pressure transmitters, flow transmitters, current transmitters, voltage transmitters, etc.
