When selecting the angle sensor, faced with many types of angle sensors, a variety of different output methods, often do not know which is the most suitable. Generally speaking, the analog output has two kinds of voltage and current output. The voltage is generally for close-range detection, and can be connected to PLC, display table, single-chip acquisition card and other upper computer systems. The current is generally for long-distance transmission, and the long-distance signal has no attenuation. It can be connected to the PLC acquisition card and display meter. It can also be connected in series with a 250 ohm resistor to convert it into a voltage signal for acquisition.