Megohmmeters Compared: 3 Listings
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The keyword asks about an insulation detector, and the source packet’s detector-type listings are non-contact voltage detectors, which only sense the presence of voltage and do not measure insulation resistance. Those are a different product type and are not used here. The three listings that do measure insulation resistance are megohmmeters, so this review compares those three. Their stated test voltages, resistance spans, and accuracy wording differ, so the figures are placed side by side rather than scored. The figures come from the packet dated 2026-10-20 and were not checked against live product pages.
Quick answer
The MH13 lists the widest stated test-voltage range, 250 V to 2500 V, together with a 1 MΩ to 200 GΩ resistance span. The AIOMEST VC60B lists a narrower span, 0.1 MΩ to 2 GΩ, with a stated accuracy of ±(4% + 2 digits). The other AIOMEST listing, the 1000 V model with a 20 GΩ top, states ±(5% + 10 digits). Both AIOMEST listings give five or three test voltages, a battery-powered build, and a stated 365-day warranty. For a job that needs very high resistance readings at high test voltage, the MH13 is the one that states both figures in its title.
Comparison table
| Listing | ASIN | Test figures the listing states | Power, weight and other details |
|---|---|---|---|
| MH13 1 MΩ to 200 GΩ Megohmmeter | B0D6W3XR2D | Test voltages 250 V, 500 V, 1000 V, 2000 V and 2500 V; resistance 1 MΩ to 200 GΩ; AC and DC voltage 10 V to 600 V | Battery powered; 2.14 pounds; signal shielding wire included; PI and DAR functions |
| AIOMEST Megohmmeter 1000V, 20 GΩ (US-AI-T0-TS58) | B0CQL6CLT9 | Test voltages 50 V, 100 V, 250 V, 500 V and 1000 V; resistance 0.1 MΩ to 20 GΩ; accuracy ±(5% + 10 digits) | Battery powered; 2.48 pounds; 180 x 140 x 70 mm; 365-day warranty as stated |
| AIOMEST Megohmmeter 1000V, VC60B | B0C2HMZ8P1 | Test voltages 250 V, 500 V and 1000 V; resistance 0.1 MΩ to 2 GΩ; accuracy ±(4% + 2 digits) | Six 1.5 V AA batteries or 9 V adapter; 1.72 pounds (spec) or 580 g (bullet); 365-day warranty as stated |
MH13 1 MΩ to 200 GΩ Megohmmeter
The MH13 title gives a 250 V to 2500 V insulation tester, a 1 MΩ to 200 GΩ span, and a 10 V to 600 V AC and DC volt meter with an auto-ranging 2000-count display, 100 data points of storage, and leakage shielding. The bullets confirm the span and say the unit switches between 250 V, 500 V, 1000 V, 2000 V and 2500 V. They describe a signal line that shields leakage to reduce measurement error, and they state the polarization index and absorption ratio functions.
The spec list gives a minimum operating voltage of 250 volts, an upper temperature rating of 35 °C, and a weight of 2.14 pounds. The brand is listed as Generic in the spec list, and the included components are the megohmmeter, signal shielding wire, test leads, alligator clips, manual, and case. The bullets describe a silicone cover for dust and moisture, and they mention low-battery indication and a data-hold function.
See the MH13 megohmmeter listing on Amazon
AIOMEST Megohmmeter 1000V, 20 GΩ (US-AI-T0-TS58)
The title names a 1000 V megohmmeter with a 20 GΩ insulation tester from AIOMEST. The bullets list five output voltages, 50 V, 100 V, 250 V, 500 V and 1000 V, and they give a resistance range of 0.1 MΩ to 20 GΩ with an accuracy of ±(5% + 10 digits). The bullets also give AC voltage at ±(1% + 5 digits) and DC voltage at ±(0.8% + 5 digits) over 10 V to 600 V, with an AC frequency range of 40 Hz to 70 Hz.
The listing states PI and DAR tests, automatic discharge after each test, and short-circuit protection with a current below 1.8 mA. It says the unit withstands AC 2 kV at 50 Hz for one minute and gives its dimensions as 180 x 140 x 70 mm. The spec list gives a minimum operating voltage of 50 volts and a weight of 2.48 pounds. Its Included Components entry reads Digital Insulation Resistance Tester, while the bullets name test leads, alligator clips, and a carrying case, so the packing list should be checked.
Read the AIOMEST 20 GΩ listing on Amazon
AIOMEST Megohmmeter 1000V, VC60B
The VC60B listing gives a test voltage of 250 V, 500 V or 1000 V, a resistance range of 0.1 MΩ to 2 GΩ, and a precision of ±(4% + 2 digits). Its bullets describe a multi-function meter that measures DC voltage up to 1000 V and AC voltage up to 750 V, each with 1 V resolution and 1 MΩ input impedance. It also states resistance up to 2 kΩ with 1 Ω resolution. The display is a 3½-digit LCD showing up to 1999, with a backlight, and the sampling rate is about three readings per second.
The spec list gives battery power, a minimum operating voltage of 250 volts, and a weight of 1.72 pounds. The bullets give 580 grams and describe six 1.5 V AA batteries or an external 9 V DC adapter. The two weights do not match: 1.72 pounds is about 780 grams, against the 580 grams in the bullets. The listing states a 365-day quality warranty, a 72 cm detachable strap, and a protective hard shell.
View the VC60B listing on Amazon
How this review chose its products
The packet held twelve listings of other types, including non-contact voltage detectors, automotive circuit testers, a battery tester, and a camera tester, along with three megohmmeters. Only the three megohmmeters are used. The non-contact voltage detectors are a different product type, and this review does not rank them against megohmmeters. The packet does not include a price or a rating for any listing, and this review does not add either. No unit was bought or used for this post.
Worked example: applying stated accuracy at 100 MΩ
Take a reading of 100 MΩ on each listing and read each percentage term as a share of that reading. The AIOMEST 20 GΩ listing’s 5 percent term is ±5 MΩ, so its percentage band runs from 95 MΩ to 105 MΩ before the digit term. The VC60B’s 4 percent term is ±4 MΩ, so its band runs from 96 MΩ to 104 MΩ before its digit term. Both bands are the same kind of figure, so the VC60B band is narrower at this reading.
The digit terms cannot be turned into ohms from the listing data. The 20 GΩ listing gives 10 digits and the VC60B gives 2 digits, but neither listing states the size of one digit on each range. The VC60B’s narrower percentage band therefore cannot be completed into a full tolerance at 100 MΩ without the range’s digit size, which the listing does not give.
What the listings do not say
None of the three listings gives the test current at each test voltage, and none gives the time the unit takes to reach a stable reading. The MH13 listing gives no accuracy figure at all. The two AIOMEST listings give accuracy for their resistance readings, but neither states the digit size on each range. The brand is labeled Generic on the MH13 spec list, and the AIOMEST name appears on both AIOMEST listings with different model labels.
For more on this type of tester, see the best insulation resistance tester guide, the best megohmmeter tester guide and the insulation resistance test equipment guide.
Frequently asked questions
Is a non-contact voltage detector an insulation detector?
No. The non-contact voltage detectors in the packet sense the presence of voltage. They do not measure insulation resistance, so they were not compared here.
What is the highest test voltage in these listings?
The MH13 lists 2500 V, which is the highest of the three. The two AIOMEST listings top out at 1000 V.
Which listing gives the narrowest stated accuracy band?
At 100 MΩ, the VC60B’s 4 percent term is narrower than the 5 percent term of the 20 GΩ listing. Neither listing states its digit size, so the full band cannot be stated.
Do the AIOMEST listings state a warranty?
Both AIOMEST listings state a 365-day quality warranty in their bullets. The MH13 listing does not state one in the data supplied.
Conclusion
Among the three megohmmeters in this packet, the MH13 states the widest voltage and resistance figures together, with five test voltages up to 2500 V and a 200 GΩ top. The AIOMEST 20 GΩ listing states the 1000 V and 20 GΩ figures with a wider accuracy band. The VC60B states the narrowest accuracy band at 100 MΩ but the lowest resistance top. Choose by the test voltage and resistance top your cables need, then confirm the digit size with the product page.
Listing links
These links go to the three listings reviewed above.
