A pen that says nothing is not the same as a circuit that is dead · review
A detector with continuously adjustable sensitivity and an eight-LED, three-color strength display, so field strength is read as a scale rather than as a yes or no.
What the figures leave us with The adjustable one, and adjustability is what makes a pen useful in a bundle. Shame about the missing rating.
The pen that turns a yes-or-no into a comparison.
Automatic and manual modes for selection according to need. Stepless sensitivity adjustment to any value. Intelligent voltage strength detection with eight LED indicators in three colors — two green, three yellow and three red — described as simple and intuitive. A detection range of 12 to 1000 V AC.
A cable tray with a dozen conductors in it defeats a fixed-threshold pen: everything lights up, because the fields overlap. Turning sensitivity down until only one conductor responds converts the tool from useless to decisive. It is the single feature that separates a pen you can work with from one you can only check a socket with.
Eight LEDs across three colors looks like a measurement and is not. The field a pen senses is a function of geometry as much as of voltage; the same 230 V reads differently through thin and thick insulation. Use the scale to compare two points, not to estimate a voltage.
Read on the day this page was built: $16 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 31 August 2026. The live price is at the top of the page.
| Amazon reference | B07J41J715 (identical on 6 markets) |
|---|---|
| EAN | 0193680466508 |
| Voltage measurement | 12–1000 V AC |
| Functions | auto and manual modes · stepless sensitivity |
| Illumination | 8 LEDs in 3 colors |
At $16, it is the 2 cheapest of the 3 models in this category published here.
At full sensitivity a pen responds to every cable in a bundle and tells you nothing. Reducing it until only one responds is how the live one is identified. BSIDE states stepless adjustment to any value.
No. It shows how strong the detected field is, which depends on insulation, screening, distance and how the pen is held as much as on voltage. Read it as a comparison between two points, never as a measurement.
None is stated in the listing. Both PeakTech pens in this hub state one; this does not.
7.8/ 10
The adjustable one, and adjustability is what makes a pen useful in a bundle. Shame about the missing rating.
Same category, nearby prices, between measuring instruments. What remains is the specifications every one publishes — half empty, a column is no use.
| Model | Price | Voltage measurement |
|---|---|---|
| BSIDE Non-contact pen with adjustable sensitivity, 12–1000 V | $16 | 12–1000 V AC |
| Neoteck Non-contact voltage pen, 12–1000 V | $10 | 12–1000 V AC |
| Fluke VoltAlert 2AC, 90–1000 V | $36 | 90–1000 V AC |
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 31, 2026.
Picking one live conductor out of several, where a single-threshold pen lights up on all of them.
Amazon reports what buyers took in the month before this page was last checked: at least 50.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for measuring instruments and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
90–1000 V AC · flat tip · industrial reference
Fluke's industrial detector, 90 to 1000 V AC with a flat tip. The listing states almost nothing beyond the range and the form.
Best for: A workshop standardized on Fluke, where the catalog reference is worth more than the listing.
≈ $36
12–1000 V AC · CAT III 600 V stated · LED indication
A 12 to 1000 V AC contactless pen stating CAT III 600 V, with LED indication and an instruction to test the pen before each use.
Best for: A pocket first check, always followed by a two-pole tester before any work.
≈ $10
50–1000 V AC · CAT III 1000 V stated · LED, buzzer and vibration
A 50 to 1000 V pen stating CAT III 1000 V, alerting by LED, buzzer and vibration, and usable for tracing a break in a wire.
Best for: Tracing cables and identifying the live conductor in noisy or poorly lit conditions.
