Non-Contact Voltage Testers Compared: 4 Listings
As an Amazon Associate we earn from qualifying purchases. Details
The keyword ncb tester does not match any product title in these listings. The closest product type in the research pool is the non-contact voltage tester, a pen that signals AC voltage without touching a conductor. This comparison covers the four non-contact voltage testers in the set.
Each card keeps the figures from its own listing. Where a listing gives two different numbers for the same feature, both are shown.
Quick answer
The main difference between these four pens is the lowest AC voltage each listing says it will detect. The Neoteck and the MXCOIRTP state 12 V as the lower end of their ranges, the Fluke states 90 V, and the Klein states 50 V. All four go to 1000 V. If the circuit you check may carry a low voltage such as a transformer output, the stated lower limit decides which pens are in scope. Confirm the lower limit on the product page before ordering.
Comparison table
| Listing | Stated AC range | Power entry | Warranty field | Notable feature in bullets |
|---|---|---|---|---|
| Klein Tools NCVT1P (B099SJ6469) | 50 to 1000 V AC | Battery Powered; 2 AAA included | See Manufacturer Website | Auto power-off; pocket clip |
| Fluke 1AC II VoltAlert (B000EJ332O) | 90 to 1000 V AC; a bullet also gives 200 to 1000 V | Alkaline; 2 AAA included | 2 years | Audible/silent mode; continuous self-test |
| Neoteck PM8908C (B01JYCVU2Q) | 12 to 1000 V AC | Battery Powered; 2 AAA included | 18 Months | Live and null wire tone; flashlight |
| MXCOIRTP MT01 (B0D7LWBYVW) | 12V, 48V and 70V to 1000V AC (three ranges) | Battery Powered; batteries not named | 1 year warranty | Three sensitivity modes; tail flashlight |
1. Klein Tools NCVT1P Voltage Tester
Listing data checked 2026-10-10. Brand Klein Tools, model NCVT1P, orange and black, weight 22.68 g, dimensions 5.5 x 0.72 x 1 inches.
- Detection range: 50 to 1000 V AC, in the title and a bullet
- Safety rating: Cat IV 1000V in the specification field
- Power: Battery Powered, with 2 x 1.5 V AAA batteries listed as included
- Indication: a green LED shows the tester is working, and a red flashing LED with a beep shows voltage detected
- Other features: auto power-off to save batteries, and a pocket clip with 6.6 foot (2 m) drop protection
The bullets list the places the listing says the pen will detect AC voltage, including cables, cords, circuit breakers, lighting fixtures, switches, outlets that are not tamper-resistant, and wires.
Conflict to check: none of the fields conflict with each other, but the warranty field says only to see the manufacturer website, so the warranty length is not stated on the listing.
Best for: buyers who need a pen rated to 1000 V AC with a stated lower limit of 50 V.
Skip if: you need detection below 50 V, because the listing does not state a lower figure.
View the Klein NCVT1P listing on Amazon (affiliate link)
2. Fluke 1AC II VoltAlert Non-Contact Voltage Tester
Listing data checked 2026-10-10. Brand Fluke, model FLUKE-1AC-A1-II, red, weight 59 g, flat tip, one high intensity red LED.
- Sensing range: nominally 90 V AC to 1000 V AC in the specification field
- Second range in a bullet: 200 V to 1000 V AC, listed alongside the 90 V figure
- Power: Alkaline, with 2 AAA alkaline batteries included
- Battery life: typically more than 1 year, according to the specification field
- Warranty: 2 years
- Specification met: Beeps
The bullets say the tip glows red and the beeper sounds when voltage is detected. The listing describes a continuous self-test and an audible or silent mode.
Conflict to check: the bullet gives a 200 V to 1000 V range, while the specification field gives 90 V to 1000 V as the nominal range. The listing does not say which range applies in each mode, so check the manual.
Best for: buyers who want a two-year warranty and a silent mode with a stated battery life.
Skip if: you need detection below 90 V, because the listing gives 90 V as the nominal lower limit and the bullet’s 200 V figure is higher still.
View the Fluke 1AC II listing on Amazon (affiliate link)
3. Neoteck PM8908C Non-Contact Voltage Detector
Listing data checked 2026-10-10. Brand Neoteck, model PM8908C, orange, weight 65 g, dimensions 6.3 x 0.79 x 0.79 inches, part number TL163-US.
- Range: 12 to 1000 V AC, in the title and the style field
- Power: Battery Powered, with 2 x 1.5 V AAA batteries included
- Warranty: 18 months
- Certification: CE in the specification field, with a bullet naming CE CAT III 600V and RoHS
The bullets say different alarm sounds and an LED indicator let the user tell a live wire from a null wire, an LED that lights when voltage is detected, and a flashlight that can light the work area. The listing says the pen is not suitable for testing Christmas lights.
Conflict to check: the specification field gives a CE mark only, while a bullet gives CE CAT III 600V. Those are two different statements, so confirm the category rating on the product page.
Best for: buyers who want a low 12 V detection limit with a flashlight and an 18 month warranty.
Skip if: you need a category rating you can confirm in the specification field, because the category figure appears only in a bullet.
View the Neoteck PM8908C listing on Amazon (affiliate link)
4. MXCOIRTP MT01 Voltage Tester
Listing data checked 2026-10-10. Brand MXCOIRTP, model MT01, orange, compact style, 1 year warranty.
- Ranges: three AC ranges, 12V, 48V and 70V up to 1000V, in the title
- Power: Battery Powered in the specification field; the battery type and the count are not named in the included components field
- Included components: listed only as a voltage tester
The bullets describe three sensitivity modes, changed by pressing the S button, with the buzzer sounding once in low and twice in medium before the high mode. The listing also describes a built-in detection light and a tail flashlight, which works only when the tester is switched off. A low battery warning is described as three flashes and a buzzer when the battery drops below 2.5 V.
Conflict to check: the bullets describe a battery warning at 2.5 V, but the included components field does not state whether batteries are supplied. Confirm the battery type and whether a battery is included before use.
Best for: buyers who want a sensitivity setting, which is described only in this listing, together with a stated 12 V lower limit.
Skip if: you need a battery count confirmed on the listing, because the included components field does not give one.
View the MXCOIRTP MT01 listing on Amazon (affiliate link)
How the four listings were compared
The comparison reads the same fields in each listing: the AC detection range, the power entry, the warranty field and the bullets that describe indication or extra features. Where the title and a bullet give the same range, the title figure is used. Where the title and the specification field disagree, both are reported. A figure that appears in only one listing is not carried into the others.
Most of the variation among these four listings is in the lower detection limit and in the warranty entry. The upper limit of 1000 V AC is the same in every listing.
Worked example: a 24 V AC source under the stated ranges
Take a 24 V AC source, such as the secondary side of a low-voltage transformer. Under the lower limits the listings state, the Neoteck (12 V) and the MXCOIRTP (12 V) fall inside their ranges. The Klein (50 V) and the Fluke (90 V) do not. A 24 V source is therefore inside the stated range of two listings and below the stated range of two others.
The listings do not say how each pen responds at 24 V in practice. The worked example only shows which listings claim coverage at that voltage. The page does not claim a detection test was run.
What the listings do not say
The Klein, Neoteck and Fluke listings do not give a sensitivity or a response time. The MXCOIRTP is the only listing that states a sensitivity setting, and it does not give a voltage figure for each setting. None of the four gives a numeric accuracy figure for detection, because a non-contact pen indicates presence rather than measuring a value.
The listings also do not state whether the pens are rated for wet locations or for use on a live panel. Those points are not in the listing data and should be checked on the manufacturer’s documentation.
Frequently asked questions
Which of these four pens states the lowest detection voltage?
The Neoteck PM8908C and the MXCOIRTP MT01 both state 12 V as the lower end of their AC ranges. The Fluke states 90 V as the nominal lower limit, and the Klein states 50 V.
Does the Fluke listing give one range or two?
The specification field gives 90 V to 1000 V AC. A bullet gives 200 V to 1000 V AC as well, so the listing states two ranges and does not say which applies in each mode.
Are batteries included with the MXCOIRTP tester?
The included components field lists only a voltage tester, and the listing does not name a battery count or type. Confirm this on the product page.
Can these pens be used to test Christmas lights?
The Neoteck listing says it is not suitable for Christmas light testing. The other three listings do not address that use.
Related guides
For a wider look at pens of this type, see Best Non Contact Voltage Checker. For a Klein-branded comparison, see Best Klein Non Contact Voltage Detector, and for the Fluke model in particular, see Best Fluke Non Contact Voltage Tester. For the steps to use one of these pens, see How to Use a Non Contact Voltage Detector.
Conclusion
The four listings agree on the 1000 V AC upper limit and differ on the lower limit. The Neoteck and the MXCOIRTP state the lowest figure at 12 V, the Fluke states 90 V with a 2 year warranty, and the Klein states 50 V with a pocket clip. The Fluke and the MXCOIRTP each have a field that needs confirmation, and the Neoteck category rating appears only in a bullet. Check the lower limit and the battery entry on the product page before ordering.
