Average Reviews:
(More customer reviews)I have used several types of these non-contact voltage detectors. They are an essential safety tool for anyone who works around live wires, or wires that may be live, not just electricians.
Along with similar products in this price range, what I like about this product is: it's compact size which allows it to be easily carried and accessible; the inclusion of a light indicator (useful in dark places like attics and basements) AND an audible indicator (useful outdoors and in bright lights). Note that some competitive products only glow when current is present.
Features that I like specifically about the Greenlee GT-11 include: the positive On-Off switch that eliminates the need to constantly squeeze a contact point on some other models; and the use of common AAA batteries. Another brand of detector I owned used small watch/button batteries that are harder to find and cost almost as much as the purchase price of the whole unit to replace.
The GT-11 will identify individual hot wires, but may not detect current when the hot wire is buried in a bundle of wires or cables, or when it is encased in conduit or other shielding. As noted in another review, it will only indicate when inserted in the 'hot' opening of an outlet, not in the neutral opening (no current). Some users will find this to be a helpful diagnostic advantage. Others may want a detector that lights up anywhere near a live wire, without needing to identify individual conductors. This is a sensitivity issue.
Greenlee also makes a Model GT-16 with adjustable sensitivity down to 5 volts if that is better suited to the user's needs.
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Use to detect voltage in outlets, lighting fixtures, circuit breakers, wires, and cables, or to find a break in a wire. Features bright LED′s and audible alarm sound if voltage is present. Silent mode feature for use in quiet settings. Automatic self-test verifies the integrity of the unit. Safe, noncontact voltage detection. Automatic shut Off after 5 minutes of nonuse. Low battery indicator. Voltage detection: 50V-1000VAC. Frequency: 50-500Hz. Uses (2) 1.5V "AAA" batteries.
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