The concept of transmitters is well understood by those who have been engaged in industrial production for many years, but it is a bit confusing for newcomers who are new to the industry. Here, we have sorted out and summarized for you. A transmitter is a converter that converts the output signal of a sensor into a signal that can be recognized by a controller. Together, the sensor and transmitter form the monitoring signal source for automatic control. Different physical quantities require different sensors and corresponding transmitters. There are many types of transmitters, and the transmitters used in industrial control instruments mainly include pressure transmitters, liquid level transmitters, temperature transmitters, temperature and humidity transmitters, differential pressure transmitters, soil moisture transmitters and so on. The so-called “change” refers to the transformation of various physical quantities from sensors into an electrical signal. For example, using thermal resistance to convert temperature into electric potential; A current transformer is used to convert a large current into a small current. Since electrical signals are the easiest to process, modern transmitters convert all kinds of physical signals into electrical signals. Therefore, when we talk about transmitters, they usually become “electric”. The so-called “sending” refers to the unification of the electrical signals from the sensors (such as 4-20MA) through electronic circuits in order to facilitate the reception and transmission of various electrical signals that have been turned into other instruments or control devices. This is achieved by means of multiple operational amplifiers. This kind of “change” + “send” constitutes the most commonly used transmitter in modern times. Sensors that are used in industrial fields and can output standard signals are called transmitters. This term is sometimes used interchangeably with sensors. In the Principles of Automatic Control, a transmitter is a converter that converts the output signal of a sensor into a signal that can be recognized by the controller. As for the fact that sometimes it is common to sensors, the output signal of most modern sensors is already a signal that can be received by a universal controller, and this signal can be directly recognized by the controller without being converted by the transmitter. Therefore, the traditional meaning of “transmitter” should be: “an instrument that converts the output signal of a sensor into a standard signal that can be accepted by a controller or measuring instrument”. If you have any questions about product consultation, product customization, agency, technical inquiry, quotation, etc., please contact Xingyi, 400-600-4496!