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An eja transmitter voltage transmitter is a device that converts the electrical parameters being measured into direct current or direct voltage, and outputs an analog or digital signal after isolation. Voltage transmitters can be divided into two main categories based on the nature of the input voltage: DC voltage transmitters are devices that isolate and convert the measured DC voltage into a standard DC voltage or DC current that is output in a linear proportion. They are further divided into single-channel DC voltage transmitters and dual-channel DC voltage transmitters. A single-channel DC voltage transmitter is a device that isolates the measured DC voltage and converts it into a single-channel standard DC voltage or DC current that is output in a linear proportion. Two-channel DC voltage transmitter: It refers to a device that isolates the measured DC voltage and converts it into two standard DC voltages or DC currents that are output in a linear proportion. The eja transmitters, which are AC voltage transmitters, are further divided into single-phase AC voltage transmitters and three-phase AC voltage transmitters. A single-phase AC voltage transmitter is one that isolates the AC voltage to be measured and converts it into a single standard DC voltage or DC current that is output in a linear proportion; a three-phase AC voltage transmitter, on the other hand, is one that isolates the three-phase AC voltage to be measured and converts it into three standard DC voltages or DC currents that are output in a linear proportion.