sensor is a general term for a device or device that can be measured and converted into a usable output signal according to certain rules
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It is usually composed of a sensitive element and a conversion element. When the output of the sensor is a specified standard signal, it is called a transmitter.
Sensor
National Standard
The definition of a sensor is a device or device that can sense the specified measured value and convert it into a usable signal according to certain rules. It is usually composed of a sensitive element and a conversion element. It is a detection device that can sense the measured information, and can transform the detected information into electrical signals or other required forms of output according to certain rules, meeting the requirements of information transmission, storage, display, recording and Control requirements. It is the primary link to realize automatic detection and automatic control.
Transmitter (
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When the signal converter is integrated with the sensor, it is called a transmitter. According to the definition of "Chinese Encyclopedia", a transmitter is a sensor that outputs a standard signal.
The definition of national standards calls a device that outputs a specified standard signal a transmitter.
The concept of a transmitter is an instrument that converts non-standard electrical signals into standard electrical signals, while a sensor is a device that converts physical signals into electrical signals
Sensors and transmitters are originally thermal instruments. concept. The sensor converts non-electrical physical quantities such as temperature, pressure, liquid level, material, gas characteristics, etc. into electrical signals or directly sends physical quantities such as pressure, liquid level, etc. to the transmitter. The transmitter amplifies the weak electrical signals collected by the sensors in order to transmit or activate the control components. Or a signal source that converts the non-electricity input from the sensor into an electrical signal and amplifies it for remote measurement and control. Analog quantities can also be converted into digital quantities as needed. The sensor and transmitter together constitute the 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 for a boiler water level gauge. It sends the lower water in the liquid level sensor and the condensed water of the upper steam to the transmitter through the instrument pipe. A remote instrument that uses the differential pressure on both sides of the bellows to drive a mechanical amplifying device to indicate the water level with a pointer. Of course, there are also devices that convert electrical analog quantities into digital quantities, which can also be called transmitters. The above is just a conceptual explanation of the difference between sensors and transmitters.
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