Non-contact voltage tester buying guide

Updated: 22 October 2026

You are about to pay between £5.99 and £13.99 on amazon.co.uk for a pen that beeps near a live flex, and the bullets all sound similar.

You are about to pay between £5.99 and £13.99 on amazon.co.uk for a pen that beeps near a live flex, and the bullets all sound similar. This non-contact voltage tester buying guide separates the alert and the AC window from lines that do not change the safety limit. Peter F., editor for DIY & tools, wrote it on 22 October 2026 from the ten listings in our non-contact voltage tester comparison and Health and Safety Executive guidance. It is not a lab test. A qualifying purchase through our links can earn a commission at no extra cost to you.

Our top picks

Badge	Product	AC range	Alert	Safety mark	Note	Price	Offer
Best overall	Aicevoos Aicevoos A1	12–1000 / 48–1000 V AC	Lamp and buzzer	CE, no CAT line	6.5	about £7.99	View offer
	Kaiweets Kaiweets HT100	12–1000 / 48–1000 V AC	Beep, bar, red above 90 V	CAT III 1000 / IV 600 V	8.0	about £10.99	View offer
Alternative	C.K C.K T2271A	70–1000 V	Red LED, no buzzer	CAT IV 1000 V	5.4	about £8.84	View offer

Best overall

Aicevoos Aicevoos A1

6.5/10about £7.99

View offer

Rank 2

Kaiweets Kaiweets HT100

8.0/10about £10.99

View offer

Alternative

C.K C.K T2271A

5.4/10about £8.84

View offer

On this page

1.What the pen is allowed to do
2.Range and sensitivity
3.The alert you will notice
4.Category marks, cells, and extras
5.What to leave for another tool

What the pen is allowed to do

HSE guidance GS38 says voltage sticks should only identify live equipment. They do not prove a circuit dead, at £5.99 or in the £30 to £41 trade band. UK mains are nominally 230 V AC at 50 Hz, with BS 1363 plugs. A look at a flex, a socket face, or a switch can be a first look. Touching copper needs a contact instrument and isolation. That split is the volt stick vs two-pole tester page. Part P is England and Wales, not Scotland or Northern Ireland.

Range and sensitivity

Dual-range pens print 12–1000 V AC and 48–1000 V AC: Aicevoos at £7.99, MUFASHA at £8.99, VENLAB at £9.99, YOWEXA at £9.99, and Kaiweets, titled HT100 with model HT101, at £10.99. Use the higher window among a bundle of mains cables. The 12 V figure is an AC claim, on the 12 V page. The C.K T2271A starts at 70 V. Yukesaky, Kioylmo, and Astraveo start at about 90 V AC. BSIDE at £13.99 adds a dial, and reviews say the 9 V cell was not in the box.

Testsieger

Aicevoos Aicevoos A1

6.5/10about £7.99

View offer

The alert you will notice

A buzzer plus a lamp beats a lamp alone in daylight. The C.K T2271A has a red LED and no buzzer, and UK reviews say that lamp is hard to see. Meteor Electrical treats an audible C.K stick as a different model. YOWEXA’s LEDs, Kaiweets’ red screen above 90 V, and VENLAB’s red versus orange are strength cues, not a voltage. One first-time VENLAB user did not learn which colour meant live.

Category marks, cells, and extras

CAT II is socket outlets, CAT III is distribution, and CAT IV is the supply side. The figure needs a voltage beside it. YOWEXA, MUFASHA, Kaiweets, and VENLAB print CAT III 1000 V and CAT IV 600 V. Aicevoos prints CE and no CAT line. None of those marks was lab-checked here. A class 2 laser under 1 mW is a pointer. VENLAB, YOWEXA, and Kaiweets list two AAA cells. Aicevoos does not name them, and one review found corroded cells. The known-live check is on how to use a non-contact voltage tester.

What to leave for another tool

HSG85 wants a two-pole detector, a test lamp, or a fused voltmeter, proved before and after, before you disconnect. Electrical Safety First does not advise a non-contact indicator for that. A Martindale VT12 at £33.48 on a best-seller snapshot is not one of these pens. Kaiweets is 4.5 from 16,240 ratings. Astraveo is 3.4 from 5, and Yukesaky has no review line. Who should skip which listing is the best non-contact voltage tester page.

Common questions

Does a CAT mark mean the pen can prove a circuit dead?

No. CAT III 1000 V or CAT IV 600 V is a claim about transient withstand, printed beside a voltage, not a licence to treat silence as safe. GS38 still limits these detectors to identifying live equipment. YOWEXA, MUFASHA, Kaiweets, and VENLAB print that pair of figures. Aicevoos does not. Neither case changes the instrument you need before you touch a conductor.

What does 12–1000 V and 48–1000 V actually switch?

It switches two AC windows, usually with an H/L key or an S button. The 12–1000 V AC side is the more sensitive claim. The 48–1000 V AC side is the one you use so a bundle of mains cables does not all read live. It is not a DC range, and it is not a promise that 8 V AC on a doorbell transformer will show.

Should a torch or a class 2 laser change the choice?

A torch helps in a loft and does not sense voltage. A class 2 laser under 1 mW, claimed on Aicevoos and MUFASHA, is a pointer. It is not part of the voltage test and it does not make the alarm safer. Choose the beep, the AC window, and the review sample first. Treat the laser as an extra you can ignore.

Are batteries in the box, or do reviews say otherwise?

VENLAB, YOWEXA, and Kaiweets list two AAA cells. Aicevoos does not name them in the spec block, and one review found corroded cells. C.K reviews say fit two AAA cells, which are not in the included list. BSIDE reviews say a 9 V cell was not supplied. A pen with no cells, or with flat cells, stays silent for the wrong reason.

Is an £8 pen a different safety class from a Fluke stick?

Not under GS38. Both identify a live field and neither proves a circuit dead. Fluke’s 1AC II is outside this comparison, in a rough £30 to £41 trade band, with a stated self-test and CAT IV 1000 V. An £8 pen can still be the right pocket check if the beep is clear and you keep a two-pole tester for isolation. Price does not create an exemption.