Sound and bright red glow indicates voltage. With the Ultimate sensor the audio alert does not go off from contact with static electricity, it only reacts to AC Voltage.
The Ultimate AC Sensor is a hand held device for determining the presence or absence of AC voltage in insulated wires, wall receptacles, fuses, junction boxes, switches and any other voltage carrying electrical systems. It is not necessary to disconnect the system in question because no contact is required for operation and current flow is not necessary to locate voltage. Simply touch the plastic tip to a connection point or move it along an insulated wire. If AC voltage is present, the Ultimate AC Sensor will sound an audio alert and an LED light in the probe tip will glow bright red. The illumination will stop at a break in the circuit or wire, and this allows the AC Sensor to be used as a troubleshooting instrument.
With the Ultimate AC Sensor, you not only get a visual alert, but an audio alert as well. Another important feature of the Ultimate AC is that the audio alert reacts only to an AC voltage field, and will not beep when it comes in contact with a static field. There is no ON/OFF switch on The Ultimate AC Sensor. Switches can wear out over time or even malfunction. Because the Ultimate AC Sensor has no switch it is always ready to use!
