GS38 says that a voltage detector has to have, amongst other things, a max of 4mm of probe tip showing, but preferably 2mm. i'm on my mobile (in hospital waiting for mrsegg's results), and cant read a lot of the websites, so: is GS38 a standard for tradesmen, or manufacturers? does it mean that my older fluke t140 testing unit is illegal to use? or just disparaged? if illegal, how illegal? am i likely to get a prohibition notice from hse? kicked offsite by h&s manager? basically: as a domestic s/e electrician, am I ok to carry on using it, or should i gumtree it, and buy myself a gs38 compliant one? it only cost me £8, so not fussy either way - although i'd prefer not to have to spend £60 on one.