A sensor is a general term for a device or device that can be measured and converted into a usable output signal according to a certain rule. It is usually composed of sensitive components and conversion components. When the output of the sensor is a specified standard signal, it is called a transmitter. The national standard GB7665-87 defines a sensor as: "A device or device that can sense the specified measurement and convert it into a usable signal according to a certain rule, usually composed of sensitive components and conversion components." It is a detection device that can feel the information to be measured, and can transform the detected and felt information into electrical signals or other required forms of output according to a certain rule, to meet the requirements of information transmission, storage, display, recording and Control requirements. It is the first link to realize automatic detection and automatic control. When the signal converter is integrated with the sensor, it is called a transmitter. According to the definition of "Encyclopedia of China", the transmitter is a sensor whose output is a standard signal. Definition of national standard: The device that outputs the specified standard signal is called a transmitter. The concept of a transmitter is an instrument that converts a non-standard electrical signal into a standard electrical signal, and a sensor is a device that converts a physical signal into an electrical signal. Sensors and transmitters are the concept of thermal instruments. The sensor converts non-electrical physical quantities such as temperature, pressure, liquid level, material, gas characteristics, etc. into electrical signals or sends physical quantities such as pressure, liquid level, etc. directly to the transmitter. The transmitter amplifies the weak electrical signal collected by the sensor in order to transfer or start the control element. Or a signal source that converts the non-electricity input from the sensor into an electrical signal while amplifying it for remote measurement and control. The analog quantity can be converted into digital quantity according to need. The sensor and transmitter together constitute a monitoring signal source for automatic control. Different physical quantities require different sensors and corresponding transmitters. There is also a transmitter that does not convert physical quantities into electrical signals, such as a "differential pressure transmitter" of a boiler water level gauge, which sends the lower water and upper steam condensate in the liquid level sensor to the instrument pipe. On both sides of the bellows of the transmitter, the mechanical amplifier is driven by the differential pressure on both sides of the bellows to indicate the water level with a pointer. Of course, there is also a transmitter that converts electrical analog quantities into digital quantities. Bluetooth Speakers,Bluetooth Speaker,Portable Speakers,Mini Speaker Dongguan Guancheng Precision Plastic Manufacturing Co., Ltd. , https://www.dpowerchargers.com
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