Hioki has a new contactless VOLTAGE clamp on a Power Logger

[CosPhi]

They can measure the voltage without even when the wires are insulated. They use the insulation as an capacitor and generate a voltage in the clamp. When the generated voltage is the same as in wire no current flows in the "capacitor" and the generated voltage is now the voltage to read. 

I think that's really a great thing. These days everything is so well insulated, so it is often difficult to get a good contact with the crocodile clams on the screw.

On the image below you can see the principal.

Japanese company's invent great things and nobody knows ... they have to yell MUCH LOUDER ...

http://www.electrotest.co.nz/PDF/PW3365E1_46E.pdf

[CosPhi]

It seems they have an electrical tester with this technology too. The SAFETY HiTESTER 3258 with a design straight out of the early 80s ...

http://www.hioki.com/products/dmm_insulation_clamp/dmm/186

Does somebody have any experience with it? Even I don't like the contactless pen style voltage detector, this does looks interesting to me.

Uhh ... I just saw the price somewhere ...