A voltage transmitter is a device used to convert an analog electrical signal generated by a sensor into a standard voltage or current signal output. It is widely used in the field of industrial automation and process control, and is also used to measure and monitor environmental parameters such as temperature, pressure, liquid level, etc.

1. What is a voltage transmitter
Voltage Transmitter, abbreviated as VT, is an electrical device that can linearly convert, filter and isolate the analog electrical signals generated by sensors into standard voltage or current signal outputs, and has high precision, reliability and anti-interference.

2. The role of voltage transmitter
The main function of the voltage transmitter is to convert the analog electrical signal from the sensor into a standard electrical signal output after processing it through the internal circuit, so that it can be recognized and processed by PLC, DCS and other control devices. In industrial process control, voltage transmitters are often used to measure and monitor various
process parameters such as temperature, pressure, flow, and liquid level to achieve automatic control and regulation of the process.

3. The working principle of the voltage transmitter
The basic working principle of the voltage transmitter is to convert the analog electrical signal generated by the sensor into a standard voltage or current signal output after being processed by internal amplification, filtering and other circuits. The voltage transmitter is usually at the input end, which needs to be connected to the signal from the sensor, and the appropriate way is selected for wiring according to different sensor types and signal characteristics. At the output end, it is necessary to select the appropriate current or voltage output mode according to the needs and connect it according to the specified wiring method. Among them, voltage transmitters often use the bridge measurement principle for signal processing, and can also use other technologies such as differential amplification and isolation to achieve signal conversion and isolation.