Men’s Journal aims to feature only the best products and services. If you buy something through one of our links, we may earn commission.
in this story
Klein Tools Non-Contact Low Voltage Tester Pen, $17 (was $20)
Why do we like this deal?
Klein Tools produces all types of utility tools, including best-selling screwdrivers, pliers, and more. However, the brand really separates itself from the pack with its power tools, which have been used in professional settings for decades. This voltage tester pen is one of its more popular devices, and it’s currently on sale for less than $20 on Amazon, but only for a limited time.
The Klein Tools Non-Contact Low Voltage Tester Pen is on sale for $17 – that’s 15% off the original $20 price tag. This item is the No. 1 bestseller on Amazon and has been purchased over 6,000 times in the last month alone. Why? Well, it could be that simple – when testing electricity, of all things, it pays to go with a brand you can trust.
Klein Tools Non-Contact Low Voltage Tester Pen, $17 at Amazon (was $20)
What shoppers need to know
- Minimum Operating Voltage: 50 volts
- Maximum Operating Voltage: 1,000 volts
- weight: 22.68 grams
There are many reasons why this voltage tester is trending on Amazon, but the main reason might be that this product is great for professionals and novices alike. It is perfect for detecting voltage at circuit breakers and light fixtures, or in locations where electricians and maintenance personnel commonly inspect. Additionally, it is ideal for light switches, cables, and other electrical items that can be installed around the home by DIYers.
No matter who uses it, this tester has a wide application range, detecting within 50 to 1,000 AC volts. And, perhaps most importantly, it’s very easy to use. Simply turn it on, point (no direct contact required), and look at the built-in LED. The green light means that no voltage has been detected, while the red light indicates that voltage is present.
In terms of pricing, this is a solid deal for a voltage tester. You can find more affordable options on Amazon, but the difference won’t be as big — and more importantly, they won’t be from a brand people know and trust.
RELATED: Amazon is selling Klein Tools’ 8-in-1 insulated screwdriver set for just $40
what shoppers are saying
Professionals love this tester and its ability to keep things simple in a potentially dangerous profession. One reviewer said, “After several projects, works as advertised.” “A no-frills product from a reliable manufacturer that tells you whether a circuit is on or not.”
Another buyer praised Klein Tools very much and was not surprised that this tester was so useful. “Klein makes the best instruments, and this voltage detector works flawlessly,” he praised.
The Klein Tools Voltage Tester is under $20 on Amazon right now. Enjoy bestselling savings as soon as possible before stocks run low.
buy more deals
- Kiewits Voltage Tester, $12 at Amazon (was $15).
- Yovexa Voltage Tester, $9 at Amazon (was $10).
- Fluke Non-Contact Voltage Tester, $25 at Amazon (was $45).

