A voltage sensor is a device or circuit that measures the voltage level in a system and outputs a signal (analog or digital) that can be interpreted or recorded. It’s used in many applications like power monitoring, battery management systems, and industrial automation.

Types of Voltage Sensors

Analog Voltage Sensors
Output a continuous analog signal proportional to the input voltage.
Common in older systems or where high precision is needed.

Digital Voltage Sensors
Output a digital signal, typically after an internal analog-to-digital conversion.
Easier to interface with microcontrollers (e.g., Arduino, Raspberry Pi).

Isolated Voltage Sensors
Use isolation methods like transformers or optocouplers to electrically isolate input and output.
Crucial in high-voltage systems for safety.