The test voltage must match the circuit, not the other way round · review
The entry point into insulation testing: a megohmmeter with several selectable ranges, manual measurement modes and a large backlit display.
What the figures leave us with An affordable introduction with its central specification unpublished. Read the manual before it is plugged into anything.
Insulation testing at a tenth of the price of the instruments below it, and a listing that leaves out the number that matters.
A professional instrument for testing insulation resistance, described as high-precision. Multiple selectable ranges with manual measurement modes. A large digital LCD with backlight. DC voltage measurement.
An insulation tester is defined by its test voltages — typically 250 V, 500 V and 1000 V. They decide what the instrument may be used on: too high a voltage applied to sensitive equipment damages it, and too low a voltage tells you nothing about insulation that will see mains. Nothing in this listing states them.
Insulation measurement is not a casual test. It energizes what it measures, and the procedure — isolate, verify dead, test, discharge — belongs to the manufacturer instructions and to national rules. What this page compares is instruments.
No such listing: the American Amazon shop answers the reference with a search box rather than a page.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
| Amazon reference | B0BWLW89HY (identical on 5 markets) |
|---|---|
| EAN | 0732168428333 |
| Insulation test | Insulation resistance |
| Functions | multiple ranges · manual selection |
| Display | backlit LCD |
The listing does not state them. That is the primary specification of an insulation tester: applying 1000 V to equipment rated for 250 V damages it. Read the manual before the first test, and do not assume.
It applies a known DC voltage across insulation and measures the resistance that results, in megohms. A low reading means current is finding a path it should not have.
The measurement energizes the circuit under test. Isolation, discharge and the procedure itself belong to the manufacturer instructions and the rules that apply where you live. This site compares instruments, not methods.
7.5/ 10
An affordable introduction with its central specification unpublished. Read the manual before it is plugged into anything.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom. Listed is not the same as in stock — availability changes daily.
Details checked on August 31, 2026.
Learning what an insulation test looks like, on equipment that is disconnected and safe to experiment on.
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.
500 and 1000 V test · 600 MΩ · combined insulation tester and multimeter
A combined insulation tester and digital multimeter with 500 V and 1000 V test voltages and a 600 MΩ range, at the top of this hub by a factor of four.
Best for: Carrying one instrument instead of two, in a trade where that trade-off is worth the price.
≈ $799
125 / 250 / 500 / 1000 V test · 0–4000 MΩ · CAT III 1000 V · dual display
Four selectable test voltages from 125 to 1000 V, insulation measurement to 4000 MΩ, continuity, AC and DC voltage — and a stated CAT III 1000 V rating.
Best for: Installation work where the test voltage has to match the circuit and the category has to be known.
50 / 100 / 250 / 500 / 1000 V · insulation to 20 GΩ · resistance 0.01 Ω–20 kΩ
Five test voltages from 50 to 1000 V and an insulation range reaching 20 GΩ — five times the ceiling of the PeakTech — with low-resistance measurement from 0.01 Ω.
Best for: Testing across a wide span of equipment, from electronics at 50 V to fixed wiring at 1000 V.
