Approved voltage detectors work by:

Approved voltage detectors are designed to identify the presence of voltage without needing to make physical contact with the electrical equipment. This is crucial for maintaining safety, as it allows users to check for voltage in potentially hazardous environments without the risk of electric shock or injury from direct contact. By detecting the electric field generated around live wires, these devices can provide reliable indications of voltage status from a safe distance, thus enhancing safety protocols and reducing the likelihood of accidents during electrical work.

This non-contact functionality is especially important in situations where the integrity of the electrical system is unknown, allowing technicians to confirm whether circuits are live before proceeding with further actions.