1. It is clear whether the current needs to be detected is AC or DC. What is the range of current to be measured? Because the actual electric load has a large range of current changes, current sensors can be divided into small current sensors and large current sensors according to the magnitude of current.
2. Input overload capability of current sensor.
3. What is the output, current or voltage, such as output voltage 4V.
4. To determine the accuracy of the sensor, some of them need high precision, so we should emphasize the accuracy when choosing the current sensor with high precision.
5. In order to detect the change of input current accurately and output the DC signal linearly changing with the input current, an auxiliary power supply is usually needed as the working power supply of the most current sensor, such as the power supply voltage: +15V.
