SEC401-51 The difference and connection between sensor and transmitter
SEC401-51 A sensor is a general term for a device or device that can be measured and converted into an available output signal according to a certain law, usually consisting of a sensitive element and a conversion element. When the output of the sensor is a specified standard signal, it is called a transmitter.
SEC401-51 The concept of a transmitter is to convert non-standard electrical signals into standard electrical signals, sensors are devices that convert physical signals into electrical signals, used to talk about physical signals, and now other signals also have. The primary instrument refers to the field measurement instrument or the base control table, the secondary instrument refers to the use of the primary signal to complete other functions: such as control, display and other functions of the instrument.
SEC401-51 Sensors and transmitters are the concepts of thermal instrumentation. 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 transmit or start the control element. Or a signal source that converts the non-electricity input by the sensor into an electrical signal and amplifies it for remote measurement and control. Analog quantities can also be converted to digital quantities as required. SEC401-51The sensor and transmitter together constitute the monitoring signal source of automatic control. Different physical quantities require different sensors and corresponding transmitters. There is also a transmitter that is not a physical quantity converted into an electrical signal, such as a boiler water level gauge “differential pressure transmitter”, he is the liquid level sensor in the lower water and upper steam condensate through the instrument tube to the transmitter on both sides of the bellows, with the difference pressure on both sides of the bellows to drive the mechanical amplification device with a pointer to indicate the water level of a distant instrument. Of course, the electrical analog quantity is changed into a digital quantity can also be called a transmitter. The above is just a conceptual illustration of the difference between sensors and transmitters.