Best Mini Voltage Tester
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A mini voltage tester is a pen or pocket tool you can carry without a bag. This roundup covers four pen-style testers from our research set. Size and weight are the main thing this post compares, so each card gives the listed dimensions and weight where the listing states them. The listings that are larger, such as the test light kits and the multimeters, are outside this roundup.
Quick answer: the smallest listed pen is the Klein NCVT1P, at 5.5 inches long and 22.68 g. The Neoteck is 6.3 inches long and 65 g, and adds a flashlight. The Fluke 1AC II is 59 g and is titled pocket-sized, though its dimension field is much larger. The MXCOIRTP gives no size or weight at all.
The four picks at a glance
| Tester | Listed length and width | Listed weight | Flashlight (as listed) |
|---|---|---|---|
| Klein Tools NCVT1P (B099SJ6469) | 5.5 by 0.72 inches | 22.68 g | Not listed |
| Neoteck PM8908C (B01JYCVU2Q) | 6.3 by 0.79 inches | 65 g | Yes |
| Fluke 1AC II VoltAlert (B000EJ332O) | 10.24 by 7.5 inches (dimension field, unclear) | 59 g | Not listed |
| MXCOIRTP MT01 (B0D7LWBYVW) | Not stated | Not stated | Yes, tail flashlight |
How we chose these four
We kept pen or pocket voltage testers whose listing names an AC detection range and describes a handheld size. Each card below relays what the listing states about size, weight and features. No tester was used or measured for this post, and nothing below reports personal use.
- Size: the length and width the listing gives, or a note that it gives none.
- Weight: the figure in the listing, in grams.
- Features that add size: flashlights and extra sensitivity modes, which the listings describe.
1. Klein Tools NCVT1P Voltage Tester
The listing gives item dimensions of 5.5 by 0.72 by 1 inches and a weight of 22.68 g, the lowest in this set. It uses a pocket clip, and the listing states 6.6 feet (2 m) of drop protection. The tester detects 50 to 1000 V AC without contact. Its LED glows green while it is working and flashes red with a beep when voltage is detected. The listing gives auto power-off to save batteries, and says two AAA batteries are included. The listing does not mention a flashlight. Listing checked 11 October 2026.
Check the Klein NCVT1P on Amazon
2. Neoteck Non Contact Voltage Detector PM8908C
The listing gives item dimensions of 6.3 by 0.79 by 0.79 inches and a weight of 65 g. It states a detection range of 12 to 1000 V AC and says the tester uses alarm sounds and LED indication to tell a live wire from a null wire. The built-in flashlight is listed for dark outlets, switches and breakers. The listing says two 1.5 V AAA batteries are included and gives an 18 month warranty. One bullet says the tester is not suitable for Christmas light testing. Listing checked 11 October 2026.
Check the Neoteck PM8908C on Amazon
3. Fluke 1AC II VoltAlert Non-Contact Voltage Tester
The title says pocket-sized and gives a voltage range of 90 to 1000 V AC, with a second bullet describing 200 to 1000 V AC. The listing gives a weight of 59 g. Its dimension field reads 10.24 by 7.5 by 1.46 inches, which is much larger than the other pens in this set, and the listing does not say whether that field measures the tester or its packaging. The tester has a flat tip, one red LED and an audible and silent mode. Two AAA alkaline batteries are included, with typical battery life of more than 1 year. Listing checked 11 October 2026.
Check the Fluke 1AC II on Amazon
4. MXCOIRTP Voltage Tester MT01
The listing gives no item dimensions and no weight. Its style is listed as compact. It describes three AC ranges, 12 V, 48 V and 70 V up to 1000 V, and three sensitivity levels selected with the S button. A detection light and a tail flashlight are built in. The listing says it is battery powered without naming the battery type. The warranty is 1 year. Because the size and weight are missing, this card cannot be compared with the other three on those figures. Listing checked 11 October 2026.
Check the MXCOIRTP MT01 on Amazon
Worked example: how much heavier is each pen?
Take the lightest and the heaviest listed weights. The Klein NCVT1P weighs 22.68 g and the Neoteck weighs 65 g, so the Neoteck is 42.32 g heavier. The Fluke 1AC II weighs 59 g, which is 36.32 g more than the Klein. Now compare length. The Neoteck is 6.3 inches long and the Klein is 5.5 inches, a difference of 0.8 inches. The two widths are 0.79 and 0.72 inches, a difference of 0.07 inches. On these listed figures the Klein is the smallest and lightest pen. The Fluke dimension field is larger still, but it may describe packaging, so it is not a like-for-like size figure.
What the listings do not say
The listings do not give a size or weight for the MXCOIRTP, so no comparison on those figures is possible for it. The Fluke dimension field may describe the box, and the listing does not say. None of the four listings gives an independent test of how the pen feels in a hand or pocket. Three listings give a battery type and one does not. Check the actual tester against the figures above before you rely on them for a specific pocket or tool bag.
Frequently asked questions
Which of these is the smallest?
The Klein NCVT1P is the smallest on the listed figures, at 5.5 by 0.72 by 1 inches and 22.68 g.
Do these pens need batteries?
The Klein, Fluke and Neoteck listings all state two AAA batteries and say they are included. The Fluke listing gives a typical battery life of more than 1 year. The MXCOIRTP listing says it is battery powered and does not name the battery type.
Which of these has a flashlight?
The Neoteck and the MXCOIRTP list a flashlight. The Klein and Fluke listings do not mention one.
Can a mini tester tell a live wire from a neutral wire?
The Neoteck and MXCOIRTP listings say they identify live and null (neutral) wires. The Klein and Fluke listings describe AC voltage detection and do not say they separate the two.
Why is the Fluke size so different from the others?
The Fluke listing gives a dimension field of 10.24 by 7.5 by 1.46 inches, while its title says pocket-sized. The listing does not say whether the field measures the tester or its box, so use the weight of 59 g for comparison.
Conclusion
For the smallest and lightest listed pen, the Klein NCVT1P is the one to compare first. If a flashlight matters more than size, the Neoteck or the MXCOIRTP lists one, and the Neoteck gives a clearer size figure. The MXCOIRTP is the only one of the four with three sensitivity levels, but its size and weight are not listed.
For related reading, see best pen voltage detector, best handheld voltage tester, and best ac voltage detector.
Klein NCVT1P on Amazon · Neoteck PM8908C on Amazon · Fluke 1AC II on Amazon · MXCOIRTP MT01 on Amazon
