Current Sensor Selection Guide
| Type |
Principle |
Range |
Accuracy |
Isolation |
Typical Use |
| Shunt Resistor |
Ohm's Law (V = I×R) |
mA to kA |
High |
No |
Battery monitoring, low-side sensing |
| ACS712 |
Hall Effect |
±5/±20/±30A |
Moderate |
Yes |
AC/DC motor control, overload protection |
| TMP392 |
Magnetic Sense (Hall) |
±16A |
High |
Yes |
Precision DC current sensing |
| INA219 |
Shunt + ADC |
0–3.2A |
Very High |
No |
Power monitoring (I²C interface) |
| CT Sensor |
Transformer Principle |
1A to 1000A |
Good |
Yes |
AC mains monitoring |
Select based on: AC/DC, range, isolation need, accuracy, and interface (analog/digital).