Non-Contact Voltage Testers Compared
As an Amazon Associate we earn from qualifying purchases. Details
Non-contact voltage testers are pens that detect live AC voltage near a conductor without a metal connection. The research file for this keyword was built around the Woods name, but none of its twelve results is a Woods product, so the title has been changed to describe what the file contains. This post compares the four non-contact pens in the file, which are the listings that state a detection range. Figures were checked on 11 October 2026 and are shown as the sellers give them.
Quick answer: the Klein NCVT1P is rated 50 to 1000 V AC and suits a standard household outlet or breaker check. The Fluke 1AC II has the most detailed alert description, with a red LED, a beeper and a continuous self-test. The Neoteck and MXCOIRTP pens state detection from 12 V, so they cover low-voltage checks that the other two do not.
The four pens at a glance
| Pen | AC detection range stated | Alert as listed | Power or size |
|---|---|---|---|
| Klein NCVT1P (B099SJ6469) | 50 to 1000 V AC | Green LED when working, red flash and beep on voltage | 22.68 g |
| Fluke 1AC II (B000EJ332O) | 90 to 1000 V AC, or 200 to 1000 V AC | Red LED and beeper, continuous self-test | Two AAA alkaline batteries |
| Neoteck (B01JYCVU2Q) | 12 to 1000 V AC | LED and sound, different alarm for live and null wire | 65 g |
| MXCOIRTP MT01 (B0D7LWBYVW) | 12 V, 48 V and 70 to 1000 V AC, three ranges | Buzzer, three sensitivity modes, flashlight | Battery powered |
How we chose these four
We kept the four listings that state a non-contact voltage detection range. The file also holds multimeters, automotive test lights and a 0 to 3800 V DC hi-pot tester, which the listing calls a withstand voltage tester. That last item measures insulation under test voltage, not the presence of voltage on a wire, so it is not a pick here. The Woods name appears in none of the twelve results. We did not test any of these pens, and nothing below reports personal use.
1. Klein Tools NCVT1P Voltage Tester
The listing describes non-contact detection of AC voltage in cables, cords, circuit breakers, lighting fixtures, switches, non-tamper-resistant outlets and wires. Its range is 50 to 1000 V AC, and the listing states a CAT IV 1000 V safety rating. A bright LED glows green to show the tester is working and flashes red with a beep when it detects voltage. The pen weighs 22.68 g and measures 5.5 inches by 0.72 inches by 1 inch. Check the Klein NCVT1P on Amazon.
2. Fluke 1AC II VoltAlert Non-Contact Voltage Tester
The Fluke listing gives a nominal detection range of 90 to 1000 V AC, and a bullet adds a 200 to 1000 V AC option. The tip glows red and a beeper sounds when voltage is detected. The listing says the pen runs a continuous self-test, so it signals that it is working. It takes two AAA alkaline batteries, which the listing says last more than a year, and it weighs 59 g. Check the Fluke 1AC II on Amazon.
3. Neoteck Non Contact Voltage Detector
The Neoteck listing states a range of 12 to 1000 V AC. It says a different alarm sound and LED level tell live and null wires apart, and the LED lights whenever voltage is detected. The pen weighs 65 g and measures 6.3 inches by 0.79 inches by 0.79 inches. The specification field gives a CE mark and no safety category. Check the Neoteck pen on Amazon.
4. MXCOIRTP MT01 Voltage Tester
The title gives three ranges: AC 12 V, 48 V and 70 to 1000 V. The listing describes three sensitivity modes. The pen starts in low sensitivity with one buzz, and a button steps through the others. It has a detection light and a tail flashlight, and the title adds a wire breakpoint finder. The listing gives no weight and no safety rating in the text used for this post. Check the MXCOIRTP MT01 on Amazon.
Worked example: which pen detects a 24 V circuit?
Take a 24 V AC circuit as the test case. The Neoteck range starts at 12 V, and the MXCOIRTP 48 V setting covers 24 V, so both should detect it. The Klein starts at 50 V and the Fluke at 90 V, so neither detects 24 V on the figures the listings state. A 120 V outlet is above every floor in the list, so all four would detect it. The 24 V case is the one that separates the pens, and it is the reason to check the lowest figure on a listing before you buy.
What the listings do not say
No listing gives a detection test result from an independent lab. The Klein listing describes detection in cables, cords and outlets, but it does not claim detection through metal conduit or thick wall material, so check the listing before you rely on a reading behind a wall. The MXCOIRTP listing gives no safety rating in the text used here, and the Fluke and Klein listings give no battery type beyond the one stated.
Frequently asked questions
Can a non-contact pen show that a circuit is dead?
No. A pen that gives no alert shows only that no voltage was detected at that point. None of the four listings claims to confirm that a circuit is dead, so test with a meter before work on a live circuit.
Why does the lowest figure on the listing matter?
A pen with a 50 V or 90 V floor may not detect a low-voltage circuit. The Neoteck and MXCOIRTP listings start at 12 V, so they are the better fit for a low-voltage check.
Does the Fluke show whether it is working?
Yes, according to its listing. The continuous self-test is described as a way to know the pen is working. The Klein pen shows the same state with its green LED.
Is there a Woods pen in this file?
No. The research file for this keyword contains no Woods product, so this post compares the non-contact pens the file does contain.
Is the hi-pot tester in the file a voltage tester?
Not in the sense used here. The listing names it a withstand voltage tester, which applies high voltage to test insulation. It does not show whether a wire is live, so it is not a pick in this post.
Conclusion
For a standard household outlet or breaker check, the Klein NCVT1P and the Fluke 1AC II state the clearest ranges and alerts. For a low-voltage check from 12 V, the Neoteck and MXCOIRTP listings are the better fit. For more on this kind of tool, read best AC voltage tester, best non-contact voltage checker, best NCV tester, best pen voltage detector and best live wire tester.
Klein NCVT1P on Amazon · Fluke 1AC II on Amazon · Neoteck pen on Amazon · MXCOIRTP MT01 on Amazon
