General Technologies CorpGTC CT8002 Cordless Circuit Tester4.6 out of 5 stars 53 customer reviews| 3 answered questionsPrice: $18.78 Free Shipping for Prime MembersIn Stock.Want it tomorrow, June 29? Order within 3 hrs 14 mins and choose One-Day Shipping at checkout. DetailsShips from and sold by Amazon.com. Professional cordless computer safe circuit tester constructed in rugged stainless steel requires no ground wire or clip and a safety V-groove accessory is provided for piercing and carrying Negligible current draw ( 20 micro-amps) is 10,000 times less than regular lamp type testers and is completely safe when working around sensitive electronic control modules and sensors Operates between 3 and 28 Volt DC in battery powered systems and has a light and sound indicator to give an audio and visual signal when positive voltage is detected Solid state high impedance electronic circuitry Long-life alkaline batteries installed

Hay thanks for the post. I've been thinking about Googling for something like that but just haven't had time.I like things that let you know immediately the results you looking for, I have several Fluke DMMs but use a test light more than the meters.I'll have the DW order asap.Thanks again.

Does this have to pierce the insulation, or is it proximity like this AC tester?

Bobbo wrote:Does this have to pierce the insulation, or is it proximity like this AC tester?Check out this description on how a proximity voltage detector works.Description

The V-trough on the blue tester should touch the wire insulation. The AC proximity tester sometimes is way too sensitive. I wish they were adjustable. For a hoot, with the AC proximity tester, wave it at refrigerator, toaster, microwave. The housing not the connector.

MEXICOWANDERER wrote:The V-trough on the blue tester should touch the wire insulation. The AC proximity tester sometimes is way too sensitive. I wish they were adjustable. For a hoot, with the AC proximity tester, wave it at refrigerator, toaster, microwave. The housing not the connector.Some AC proximity testers do have adjustable sensitivity. Mine does via a set of up/down buttons. It is indeed an occasionally handy feature.

Test Light "Look Ma! No Ground Clip! | Good Sam Community

dougrainer
Nomad
Jun 30, 2017
D.E.Bishop wrote:
Bobbo wrote:
Does this have to pierce the insulation, or is it proximity like this AC tester?

Check out this description on how a proximity voltage detector works.

Description

If you want a good AC tester tool, this is what I use. I ALWAYS turn the breaker On and OFF to verify the tool is doing its job. Doug

https://www.amazon.com/gp/product/B000NGTMWS/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
4x4van
Explorer III
Jun 30, 2017
Again, this (the original post) is NOT an AC tester, nor is it a proximity tester. It is a 12vdc tester that utilizes your body as a ground path rather than a wire with an alligator clip. The V trough is simply an added piece to easily center the wire so that the metal tip can more easily pierce the insulation; it can be removed.
MEXICOWANDERER
Explorer
Jun 30, 2017
It's the lack of a ground clip that appeals to me. Proximity sensors are damned near useless when digging in a bundle of wires :)
Harvey51
Explorer
Jul 05, 2017
I have heard of DC voltage proximity sensors.
I even ordered one on eBay, which didn't work. A DC voltage on a wire would cause an electric field near the wire but it would be hard to detect in comparison to the Earth's E field and I expect it would be expensive.
MEXICOWANDERER
Explorer
Jul 05, 2017
The Class VI high voltage alert I had to wear was a four thousand dollar item for 218 Kv AC work. 4-meter corona on those systems.

Plug DC puncture hole with silicone dielectric grease when finished.
Harvey51
Explorer
Jul 05, 2017
Thanks for the tip on the DC tester with the clip pin contact, Mexico Wanderer. I like it but don't need it often enough to justify the $30 Canadian cost. I'll stick with using a needle by hand. Hmm, maybe I could make one of those needle clips with a closepin and needle.

Also thanks for the grease tip for the hole.
MEXICOWANDERER
Explorer
Jul 06, 2017
Ah yes, the Canadian Peso. Failed Lawyers and Greedy Bankers. Say, that sounds similar to the way of greed south of Ottawa. Never let "the burglar" explain your rights as "The Victim". It's almost as degrading as paying a banker to float your bank balance.

I used an ironwood V-block. One inch square. Handle telescope off an old magnet parts retriever

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