Salisbury's Self-Testing voltage detectors accomplish this continuously. An extra circuit generates an electric field that is sensed by the unit the same as it does when checking for voltage. The detector responds by flashing the light and sounding the buzzer each time this occurs. The result is an intermittent flash and beep whenever the selector switch is set to any voltage position.

No more checking against known voltage sources, truck ignitions, or separate field generating devices. You get automatic verification with each use and because of the flash and beep when the unit is turned on it will automatically remind the user to it off before storage maximizing battery life.

If you would like to see a demonstration of the new Salisbury Self-Testing Voltage detectors, please contact your local Salisbury representative to make arrangements.