Best Insulation Resistance Meters (Sep. 2026) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

UNI-T 1000V Megohmmeter Insulation Megger Tester, Ground Resistance Tester Me...

9.9
CPR Score
Top 2

BTMETER BT-6688B Megohmmeter 200 Gig Ohm Digital Insulation Resistance Tester...

9.8
CPR Score
Top 3

Supco M500 Insulation Tester/Electronic Megohmmeter with Soft Carrying Case, ...

9.7
CPR Score
Tips


Our team has analyzed 129 products of different Test, Measure & Inspect brands, including KAIWEETS, Fluke, Supco, allsun, UEi Test Instruments, BTMETER, UNI-T, AOPUTTRIVER, INFURIDER, AIOMEST, WapoRich And GOLDCHAMP. The following list of top 30 Insulation Resistance Meters is prepared for the customers by analyzing 129 Insulation Resistance Meters reviews and comparing different features. 

* CherryPicks.Reviews is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best Insulation Resistance Meters Rated by CherryPicks

Market Overview
Insulation Resistance Meters Reviewed
  • Reviews Analyzed: 2,885 Items
  • CPR Avg. Rating: 8.5 / 10
30 Products Evaluated
  • Highest Price: $1,510.26
  • Lowest Price: $32.99
  • Avg. Price: $134.06
Price Disclaimer

Top 30 Insulation Resistance Meters on Amazon (Verified You can Buy)

Top 1

UNI-T 1000V Megohmmeter Insulation Megger Tester, Ground Resistance Tester Meter 0 Megohm to 5.5GΩ with AC 100V/250V/500V Testing Voltage & LCD Display Backlight(UT501A)

UNI-T
UT501A
5.9055 x 3.937 x 2.7953 inches
1.1023 pounds

Ratings for UNI-T (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Xin Tester Tools Factory Store -

Features

1.MULTI-FUNCTIONAL INSULATION TESTER--UT501A insulation resistance tester can measure insulation resistance, AC voltage, etc
2.HIGH ACCURACY AND STABLE PERFORMANCE DIGITAL EARTH RESISTANCE TESTER--This insulation resistance tester megohmmeter have high degree of accuracy, stable performance, easy operation and reliability
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Top 2

BTMETER BT-6688B Megohmmeter 200 Gig Ohm Digital Insulation Resistance Tester, 500V/1kV/2.5kV/5kV Test Voltage, Auto Ranging, Backlight Display

BTMETER
BT-6688B
10.4 x 9.2 x 3.5 inches
1.9842 Pounds

Ratings for BTMETER (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
bestmeter -

Features

✅【High Insulation Resistance Tester】Digital Autoranging Megohmeter measures high insulation resistance 0.1M~200G ohms with accuracy 3%~10% + 5 digits.
✅【Wider Testing Voltage】The output testing voltage can be selected from 100V/250V/500V/1000V/2500V/5000V. This Insulation Resistance Tester comes with a non-slip and anti-fall protective case which is insulative.
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Top 3

Supco M500 Insulation Tester/Electronic Megohmmeter with Soft Carrying Case, 0 to 1000 megohms Black

Supco
M5462
9.3 x 6.0 x 1.8 inches
1.0 Pounds

Ratings for Supco (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Nygmat -
FYC Tools -
Amazon Resale -

Features

Measure insulation values up to 1000 me ohms at 500 VAC
Zone scale to indicate insulation condition
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Top 4

M500 Megohmmeter for Insulation Testing,Compatible with Supco M500 Electronic Megohmmeter up to 1000 Megohms

FOWBOA
M500 Megohmmeter
7.0 x 0.99 x 6.0 inches

Ratings for FOWBOA (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
FOWBOA -

Features

The M500 megohmmeter is specially designed for HVAC/motors/transformers. It is suitable for testing the insulation of professional applications such as motors, refrigeration compressors, control boards, and air conditioning units.
LED indicator light: The M500 megohmmeter is equipped with a resistance range scale display, a clear interface, and intuitive LED indicator lights, which show the test status and results, allowing for simple and quick information acquisition.
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Top 5

BTMETER Megohmmeter 1000V Insulation Resistance Tester, Electrical Megaohm Meter 200MΩ~2K Megohm Megger with 250V/500V/1000V Testing Voltage, Digital Multimeter Measure AC DC Voltage

BTMETER
BTMETER Megohmmeter
4.5669 x 2.4803 x 6.9291 inches
1.2787 pounds

Ratings for BTMETER (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
bestmeter -

Features

✅【Megaohm Meter】This digital Insulation Resistance Tester DIRT supports 3 different testing voltage options (250, 500 and 1000VDC) to use in meausring insulation resistance ohm from 0.1MΩ to 2GΩ with ± 4% accuracy. Display insulation resistance value specifically, not just a range.
✅【Digital Multi Tester】Not just an mega meter , but also an electrical multimeter with 1999 counts display, which can measure AC voltage up to 750V with ±1.0% accuracy, test DC voltage up to 1000V with ±0.5% accuracy and troubleshoot continuity with buzzer.
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Top 6

AIOMEST Megohmmeter 0.1MΩ-20GΩ Digital Insulation Resistance Tester with 50V/100V/250V/500V/1000V Output Voltage, Data Logging, 10V~600V AC/DC Voltmeter Megohm Meter w/Test Lead & Zipper Bag

AIOMEST
US-AI-T0-TS58

Ratings for AIOMEST (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
AIOMEST-US -

Features

🎯【Insulation Resistance Tester】 Choose from 5 optional output voltages (50V, 100V, 250V, 500V, 1000V) to measure insulation resistance from 0.1MΩ to 20GΩ with ±(5%+10digits) accuracy, digital meger for various electrical equipment IR testing, like motor, cable, switch, and HVAC/AC compressor winding etc.
🎯【Data Storage】The megohmmeter provides convenient data management features, including data freeze, storage, reading, and deletion functions. With the MEM key, you can easily store up to 100 sets of measurement data.
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Top 7

Megohmmeter 1000V Insulation Resistance Tester, 1999 Counts Megaohm Meter Big LCD Display DCV ACV Megohm Meter DC250/500/1000V, 200MΩ~2000MΩ Resistance Testing with Data Hold Backlit for Motor Cables

AOPUTTRIVER
Megaohm Meter 1000V
6.69 x 2.48 x 6.93 Inches
1.2787 Pounds

Ratings for AOPUTTRIVER (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
AOPUTTRIVER-US -

Features

【High Precision Insulation Resistance Tester】Testing Voltage:250V/500V/1000V;Insulation Resistance:200MΩ-2000MΩ;AC Voltage:0-750V;Frequency Range:40Hz-400Hz; Manual range; 1999 Counts
【1000V Insulation Resistance Tester】Testing Voltage:250V/500V/1000V;Insulation Resistance:200MΩ-2000MΩ;AC Voltage:0-750V;Frequency Range:40Hz-400Hz; Manual range; 1999 Counts
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GOLDCHAMP 2-in-1 Insulation Resistance Meter & Digital Multimeter, 20GΩ/1000V Megohmmeter with Auto Range, Data Hold, AC/DC Voltage Tester, Capacitance Measurement for Electrical House Testing

GOLDCHAMP
GCUS-T9-SK505A

Ratings for GOLDCHAMP (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
GOLDCHAMP -

Features

【2-in-1 Meter】The SK-505A is an electrical measuring tool that combines an insulation resistance tester and a digital multimeter. It provides high-precision measurements up to 20 GΩ, has a rated voltage of 1000 V, and is suitable for professional electrical diagnostics
【Wide Range Measurement】This auto-range multimeter, using the included alligator clips and test leads, can measure 1000V voltage and 100mF capacitance, as well as resistors, diodes, etc. It also comes with a charger for greater convenience and a longer lifespan
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ZOYI ZT-1000R 2-in-1 Megohmmeter 1000V with DAR & Digital Multimeter, Insulation Resistance up to 20GΩ, 19999 Counts, AC/DC Diodes Ohm, TRMS, Auto-Ranging, Backlit LCD Screen, for Professional

ZOYI
ZT-1000R
  • Manual: English

Ratings for ZOYI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Zoyi&Zotek Official Flagship Store -

Features

【Professional-Grade 2-in-1 Electrical Tester: Multimeter & Megohmmeter】ZT-1000R is a device with both a high-precision digital multimeter and a professional insulation resistance tester (megohmmeter). If you need to measure current and voltage or detect leakage, with this multimeter you don't need to carry multiple devices, it dramatically improves your work efficiency, is the ideal tool for electricians, engineers, maintenance technicians.
【Advanced Insulation Diagnostics: DAR + PI Testing】This insulation tester supports DAR testing and PI testing in addition to traditional insulation resistance testing, enabling it to meet more specialized testing needs. Quantify insulation quality degradation and predict failures in motors, transformers, and cables – critical for preventive maintenance programs.
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Top 10

M500 Megohmmeter for Insulation Testing,Compatible with Compressor Tester HVAC, Multimeter Tester, Battery Operated, 20-1000 Megohms at 500 Volts,with Soft Carrying Case

METALBEE
M500 Insulation Tester
7.0 x 3.8 x 2.4 Inches

Ratings for METALBEE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
MetalBee -

Features

High-Precision Insulation Testing: The M500 megohmmeter measures insulation resistance up to 1,000 megohms at 500 volts AC. The M500 megohmmeter suitable for motors, transformers, and HVAC systems, enabling rapid defect detection.
Clear and Intuitive Display: After multiple tests, the M500 Megohmmeter can quickly assess equipment health. Equipped with a resistance grading system, it clearly displays the insulation status (Good / Normal / Risk).
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Top 11

UEi IRT803 Insulation Resistance Tester 600V AC/DC, Megohmmeter Measures Insulation Resistance Up to 20GΩ, Voltage Testing Up to 600V

UEi Test Instruments
IRT803
2.17 x 3.6 x 8.27 inches
1.0 pounds

Ratings for UEi Test Instruments (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
AmericanMeterWarehouse INC -
ADVENTURER'S BAG 825

Features

Wide Testing Range & Very Accurate – The IRT803 provides voltage testing at 50V, 100V, 250V, 500V, 1000V with a range of 0.01MΩ-2GΩ. The IRT803 provides highly accurate readings with an accuracy of ±1.5-3% + 5 digits when measuring between 0.01MΩ-500MΩ.
High Safety Rating – The IRT803 is CATIV rated up to 600V, and CATII up to 1000V to guarantee you are well protected on the jobsite.
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Top 12

Insulation Resistance Tester 1000V Megohmmeter w/TRMS Multimeter 2 in 1, AIOMEST Megaohm Meter w/IR Test, NCV, Volt, 20A Current, Capacitance, Inductance, Continuity, Hz & Temp for HVAC, Motor

AIOMEST
T7-VC4060-B1

Ratings for AIOMEST (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
AIOMEST-US -

Features

🎯【1000V high-voltage megohmmeter 】Safely perform Insulation Resistance (IR) tests​ at 500V or 1000V​ with a measurement range up to 2000MΩ with ± 4% high accuracy. It is ideal for checking motor windings, appliance insulation, and cable integrity to prevent electrical failures, safety hazards, and costly downtime. Display insulation resistance value specifically, not just a range.
🎯【True RMS Accuracy & 6000-Count Display】More than just an megaohm meter, this is a full-featured professional multimeter. It is capable of measuring AC/DC voltage up to 1000V/750V and current up to 20A. The True RMS (Root Mean Square)​ technology ensures accurate readings even on non-linear loads like motor drives and VFDs. The large, backlit 6000-count LCD​ provides a clear display, making measurements easy to read in low-light conditions.
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Top 13

Digital Insulation Resistance Tester, RQ-6688F Voltage Tester 250/500/ 1000/ 2500V, Auto Range Megohmmeter 1MΩ~20GΩ, Resistance Tester with 1999 Count LCD Display, Data Hold, Back-Light (Battery)

WapoRich
RQ-6688F
0.4409 Pounds

Ratings for WapoRich (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
hpruiqi -

Features

High Precision Megohmmeter & Voltmeter: Voltage range:250V/500V/ 1000V/2500V; AC voltage: 1~750V; Resistance range: 1MΩ~20GΩ; Accuracy: 1MΩ~200MΩ: ± ( 3.0%+5 )/ 200MΩ~10GΩ: ± ( 5.0%+5 )/ 10GΩ~200GΩ: ± ( 10.0%+5 ); Frequency Range:40Hz~400Hz.
Cool Insulation Tester :WapoRich RQ-6688F Insulation Tester come with 1999 count LCD display, Data hold, Back-light, Low battery display.It has the characteristics of simpler operation and more accurate measurement,which includes the functions what you need.
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Top 14

ALLOSUN - EM480B Audio Impedance Tester Digital LCD Insulation Resistance Megohmmeter Meter Tester with Bag

allsun
EM480B
6.6929 x 2.5591 x 4.3307 Inches
1.1023 pounds

Ratings for allsun (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
ALLOSUN -
Amazon.com -

Features

Power supplied by 6 pieces 1.5V battery, AA or equivalent.(Battery not provided by seller)
The product is with carrying case and belt, which is easy to carry and use.
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Top 15

MH13 250V-2500V Digital Insulation Resistance Tester 1MΩ-200GΩ Megger Megohm Testing Meter Auto Range 2000 Counts LCD Display 10V~600V AC/DC Voltmeter with 100 Data Storage

KKnoon
c0172115-bb54-456f-be4e-95f3ab6dbdf4
8.2677 x 7.0866 x 3.1496 inches
1.411 Pounds

Ratings for KKnoon (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Huanancord -

Features

⭐Insulation Resistance Tester: this instrument applies automatic voltage release function, with high stability and reliability, features maximum 2000 counts, 100 groups of data storage, and 1MΩ-200GΩ insulation resistance measuring range.
⭐AC/DC Voltage Measuring: rated output voltage is variable, easy to switch between 250V/ 500V/ 1000V/ 2000V/ 2500V through the up/ down button. It can measure AC and DC voltage with the range of 10V-600V. Battery operated, with large digital LCD backlit display, easy to read.
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Top 16

UEi IRT807 Insulation Resistance Tester 1000V AC/DC, Advanced Megohmmeter Measures Insulation Resistance Up to 2GΩ, Voltage Testing Up to 1000V

UEi Test Instruments
IRT807
3.0 x 9.5 x 6.0 inches

Ratings for UEi Test Instruments (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
AmericanMeterWarehouse INC -
WIDESTEP -

Features

Wide Testing Range & Very Accurate – The IRT807 provides voltage testing at 50V, 100V, 250V, 500V, 1000V with a range of 0.01MΩ-2GΩ. The IRT807 provides highly accurate readings with an accuracy of ±1.5-3% + 5 digits when measuring between 0.01MΩ-500MΩ.
High Safety Rating – The IRT807 is CATIV rated up to 600V, and CATIII up to 1000V to guarantee you are well protected on the jobsite
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Top 17

AIOMEST Digital Megohmmeter Megaohm Meter with 250V/500V/1000V Test Voltage Testing Insulation Resistance IR 0.1MΩ~2GΩ, Measure AC DC Volt Ohm, Continuity Tester, Megaohmeter w/Over-Range Indicator

AIOMEST
AI-T6-VC60B
1.7196 pounds

Ratings for AIOMEST (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
AIOMEST-US -

Features

🎯【Insulation Resistance Testing】 The digital insulation tester VC60B offers optional test voltages of 250V, 500V, and 1000V, making it ideal for testing insulation resistance in motor, cable, electromechanical equipment, telecom devices, and power facilities. With a measurement range from 0.1MΩ to 2GΩ and precision of ±4%+2 digits, it ensures accurate & reliable results for both professionals and beginners.
🎯【Multi-Functional Megohmmeter】 Beyond insulation resistance measurement, the mega ohm tester VC60B can measure DC voltage up to 1000V and AC voltage up to 750V, both with 1V resolution and 1MΩ input impedance. It also measures resistance up to 2KΩ with 1Ω resolution and 1mA test current, and supports continuity testing with a buzzer for resistances below 50Ω.
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Top 18

M500 Megohmmeter, Compatible with Supco M500 Megohmmeter, 500 Volts Megohmmeter, M500 Megger Tester Measures Up to 1000 Megohms, Ideal for HVAC Compressor Tester and Home Improvement Use

YUKGAMS
M500 Megohmmeter

Ratings for YUKGAMS (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
shenglike -

Features

【Accurate Insulation Testing】The m500 megohmmeter measures insulation resistance precisely up to 1000 megohms at 500VAC. Ideal for a wide range of electrical components and systems, detect insulation defects, the m500 megohmmeter ensuring the safety and reliability of your electrical installations
【Self-contained Status Indicator】The M500 megohmmeter is equipped with a resistance range scale display, the m500megohmmeter can directly indicate the insulation condition. Through different display areas, the m500 megohmmeter can quickly inform the user whether the insulation of the tested equipment is in good condition, normal condition or at risk
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Top 19

Digital Insulation Resistance Tester, Megohmmeter Ohm Meter YF-VC60B+, Voltage Tester 250/500/1000V, Megohm Meter with Backlight LCD Display, Data Hold

INFURIDER
YF-VC60B+

Ratings for INFURIDER (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
INFRARED -

Features

【Professional Insulation Tester】 The digital insulation tester features voltage measurement range from 250V to 1000V, resistance up to 2000MΩ, DC voltage range from 0~1000V, and AC voltage range from 0~750V. A resistance tester that you must have is suitable for testing a wide range of electrical systems
【Easy Operation】This resistance meter is equipped with high-definition LCD display with back-light, maximum display of 1999, just press the "HOLD" button to get the data; press the backlight button so that you can use it clearly in a dark environment
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Top 20

KAIWEETS Megohmmeter, Insulation Resistance Tester, Up to 100GΩ, 50V/100V/250V/500V/1000V, One-Touch DAR/PI, with AC/DC Voltage Testing for Motors, Solar, HVAC

KAIWEETS
KE1000
11.811 x 9.0551 x 2.7559 inches
3.5274 pounds

Ratings for KAIWEETS (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KAIWEETS Direct 5,894

Features

Five-Range Pro Insulation Tester: Accurately measures insulation resistance from 3.00 MΩ to100.0 GΩ with 5 selectable test voltages (50V/ 100V/ 250V/ 500V/ 1000V). Accuracy ±(3 % + 5 digits) ≤20 GΩ, ±(5 % + 5 digits) ≤100 GΩ.
One-Touch DAR/PI Calculation: Built-in Absorption Ratio (DAR) and Polarization Index (PI) auto-calculate in real time—no stopwatch required.
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Top 21

M500 Insulation Tester MEGOHMMETER, Compatible with Supco M500 Electronic Megohmmeter, Multimeter Tester, Compressor Tester HVAC, Battery Operated, 1000 Megohms at 500 Volts, with Soft Carrying Case

FUHUOLU
M500
6.99 x 1.0 x 6.0 inches

Ratings for FUHUOLU (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon Resale -
FUHUOLUU -

Features

Precise Insulation Testing, Ensure Electrical Safety:The M500 megohmmeter (compatible with Supco M500 megohmmeter) measures insulation resistance up to 1000 megohms at 500V AC. As a professional megaohm meter, mega ohmmeter, and megger insulation tester, it works for motors, transformers, HVAC systems and quickly detects defects. It is a must for pros/DIYers using hvac electrical tools and professional hvac service tools
Intuitive Display, Efficient Operation:Built-in resistance scale shows insulation status (Good/Normal/Risk) clearly. No complex analysis,judge equipment health fast, simplify tests. This hvac megohmmeter and megameter tester simplifies Insulation Testing, ideal for hvac users
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Top 22

Digital Megohmmeter, Insulation Resistance Tester, 50V/100V/250V/500V/1000V for Electrical Equipment and Insulating Resistance Up to 100GΩ with PI/DAR, Frequency and Low Voltage Test

Ayitam
pm1508
1.8034 pounds

Ratings for Ayitam (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Guilin Huayi Peakmeter Technology Co.,Ltd -

Features

Combined Megohmmeter and Multimeter into One: This megohmmeter measure insulation up to 100GΩ with frequency measurement, low voltage test and test voltages: 50V, 100V, 250V, 500V and 1000V suitable for measurement of transformer, motor, generator, cable, electrical equipment and insulating materials.
PI (polarity index) /DAR (dielectric absorption ratio) function for more accurate of insulation condition.
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Top 23

NJTY T6125 Digital Insulation Resistance Tester, 2500V Megohmmeter, 0.01MΩ–200GΩ, AC Voltage (10V-600V), Low Resistance (0.01Ω-60Ω), Data Hold, Over-Range Alarm, Auto Shutdown, Backlit LCD

NJTY
T6125
3.7 x 1.68 x 6.3 Inches
1.2 pounds

Ratings for NJTY (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
NJTY-us -

Features

Wide Insulation Resistance Measurement Range: The T6125 measures insulation resistance from 0.01MΩ to 200GΩ with four selectable output voltages: 250V, 500V, 1000V, and 2500V, making it ideal for testing a wide range of electrical equipment such as transformers, motors, and power cables
AC Voltage & Low Resistance Measurement: Measures AC voltage from 10V to 600V and low resistance from 0.01Ω to 60Ω, ideal for power systems and components that require precise AC voltage and resistance testing
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Top 24

WapoRich Megohmmeter Insulation Resistance Tester, 1999 Counts Megaohm Meter 200MΩ~2K Megohm Megger with DC250/500/1000V AC750V Testing Voltage, Digital Multimeter Measure with Data Hold Backlit

WapoRich
T6-VC60B
1.2787 pounds

Ratings for WapoRich (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
hpruiqi -

Features

✨【High Precision Megaohm Meter】:WapoRich Megohmmeter Insulation Resistance Tester Supports 3 different test voltage options (250, 500, and 1000VDC), you can according to different voltages, more accurate measurement of insulation resistance ohms from 0.1M Ω to 2G Ω can be achieved accuracy is ± 4%.
✨【Multi-function Megohmmeter】:WapoRich Megohmmeter can select insulation resistance measurement/resistance and on-off measurement//DC voltage measurement/AC voltage measurement according to different sockets. The accuracy is ± 1.0% when measuring an AC voltage of 750V, and ± 0.5% when testing a DC voltage of 1000V.
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Top 25

UNI-T 2500V Insulation Megger Tester Megohmmeter, Ground Resistance Tester Meter 0 Megohm to 20GΩ with AC 500V/1000V Testing Voltage & LCD Display Backlight(UT502A)

UNI-T
UT502A
5.9055 x 3.937 x 2.7953 inches
1.6623 Pounds

Ratings for UNI-T (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Xin Tester Tools Factory Store -

Features

1.PROFESSTIONAL MEASUREMENT --UT502A insulation resistance tester can perform continuous low resistance measurement, AC voltage measurement, low resistance zeroing and other functions.
2.HIGH ACCURACY AND STABLE PERFORMANCE DIGITAL EARTH RESISTANCE TESTER--The megohmmeter insulation resistance tester have high degree of accuracy, stable performance, easy operation and reliability.
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Top 26

M500 Megohmmeter Insulation Tester, HVAC Compressor & ECM Motor Tester up to 1000 Megohms at 500V DC, Volt Ohm Meter with Soft Case

Iexcauw
M500

Ratings for Iexcauw (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Iexcauw -

Features

Professional-Grade Applications & HVAC Essential: Designed for ultimate versatility, this M500 insulation tester is a core addition to any professional HVAC tool kit. It is perfect for testing insulation resistance in motors, refrigeration compressors, control boards, transformers, and air conditioning units, helping pros and DIYers identify grounded windings or moisture issues before they lead to costly equipment failure.
High-Precision Performance (500V AC/1000MΩ): Engineered for accuracy, this megaohm meter measures up to 1000 megohms at 500V AC. It functions as a reliable megger insulation tester to quickly detect insulation breakdown, ensuring maximum electrical safety and system integrity during routine inspections or emergency HVAC service.
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Top 27

KAIWEETS Insulation Resistance Tester, Up to 200GΩ, Pro Megohmmeter, 5 Range 100V/250V/500V/1000V/2500V, One-Toch DAR/PI, Max/Min, Measures Resistance, AC/DC Voltage for HVAC, Motors, Solar, KE2500

KAIWEETS
KE2500
11.811 x 9.0551 x 2.7559 inches
3.5274 pounds

Ratings for KAIWEETS (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
KAIWEETS Direct 5,894

Features

【Professional 5-Range Insulation Tester】Delivers precise measurements of insulation resistance spanning 0.1MΩ to 200.0GΩ, paired with adjustable DC test voltages (100V, 250V, 500V, 1000V, 2500V) – ideal for a wide range of electrical maintenance and safety verification tasks.
【Advanced Diagnostic Capabilities】Enables on-device calculation of Absorption Ratio (DAR) and Polarization Index (PI), allowing you to evaluate insulation degradation trends and anticipate potential faults – a vital feature for proactive preventive maintenance.
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Top 28

Fluke 1535 Insulation Tester, Insulation Tester, for Frontline Industrial and Electrical Insulation Testing, Test Voltages from 250 V to 2500 V and Resistance Measurements up to 500 GΩ

Fluke
FLUKE-1535
7.3 x 8.3 x 3.7 inches
6.07 Pounds
  • Original Language: German
  • Original Language: French
  • Original Language: English
  • Original Language: Spanish
  • Original Language: Italian

Ratings for Fluke (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Amazon Resale -

Features

Quickly & efficiently determine the integrity of cables, windings on motors & transformers, and numerous electrical equipment & installations
Automatic calculation of polarization index (PI) and dielectric absorption ratio (DAR)
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Top 29

M500 Insulation Tester/Electronic Megohmmeter – 0 to 1000 Megohms, 500V, with Soft Carrying Case

FRIGESWIFT
M500
7.0 x 3.8 x 2.4 inches

Ratings for FRIGESWIFT (CPR Score)

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FrigeSwift -

Features

Measures 20-1000 megohms at 500V with clear LED indicators for quick fault detection.
Zone scale to indicate condition of insulation
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Top 30

Insulation Resistance Tester, Ohm Meter, 100V/250V/500V/1000V Voltmeter 0 to 5G ohm Meter Megohmmeter, Ground Resistance Tester 2000 Counts LCD Display with Backlight (UT501A)

UNI-T
UNI-T UT501A
5.9055 x 3.937 x 2.7953 inches
1.3228 Pounds

Ratings for UNI-T (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
GALOOK-US -

Features

【Professional resistance tester】The insulation resistance tester has a voltage output of 1000V, a maximum range of 5GΩ, and an AC voltage measurement function (30V~750V (50Hz/60Hz)), automatic range, data retention, and accurate readings to meet the needs of electricity and home maintenance.
【Easy operation】The electrical tester has a high-definition LED large-screen display, the maximum display is 9999, automatic backlight, the backlight automatically turns on when measuring, and turns off when it stops. The reading can be clear even in dark environments.
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Top 10 Insulation Resistance Meters - Verified to Buy (September 2026)

Top 10 Insulation Resistance Meters Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • UNI-T
  • BTMETER
  • Supco
  • FOWBOA
  • AIOMEST
  • AOPUTTRIVER
  • GOLDCHAMP
  • ZOYI
  • METALBEE
  • UEi Test Instruments

Top 10 Insulation Resistance Meters Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 ADVENTURER'S BAG 57,644 4.9
🥈 KAIWEETS Direct 11,354 4.9
🥉 Nygmat 3,292 4.5
4 ALLOSUN 3,181 4.8
5 WIDESTEP 2,276 4.7
6 bestmeter 1,683 4.8
7 AOPUTTRIVER-US 495 4.8
8 Amazon.com 386 4.7
9 AmericanMeterWarehouse INC 324 4.7
10 Xin Tester Tools Factory Store 301 4.9
View or download top Insulation Resistance Meters seller & rating report
ADVENTURER'S BAG [57644] KAIWEETS Direct [11354] Nygmat [3292] ALLOSUN [3181] WIDESTEP [2276] bestmeter [1683] AOPUTTRIVER-US [495] Amazon.com [386] AmericanMeterWarehouse INC [324] Xin Tester Tools Factory Store [301] ADVENTURER'S BAG 71% KAIWEETS Direct 14% Nygmat 4% ALLOSUN 4% WIDESTEP 3% bestmeter 2% AOPUTTRIVER-US 1% Amazon.com 0% AmericanMeterWarehouse INC 0% Xin Tester Tools Factory Store 0%

[Get] Insulation Resistance Meters Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.

When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.

What does "Prime" Mean?

"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are  an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.

Prime members also have access to other benefits, including 2-Day ShippingExclusive Member DealsPrime VideoBuy With PrimeAmazon MusicPrime Gaming, and more.

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What does "Free Shipping" Mean?

"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Test, Measure & Inspect supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best Insulation Resistance Meters to buy for new September 2026?

CherryPicks’s Methodology for Evaluating Insulation Resistance Meters

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Test, Measure & Inspect items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 129 of Insulation Resistance Meters reviews based on our selection criteria. It helped us shortlist the top qualified and rated Insulation Resistance Meters for Test, Measure & Inspect, We found that most customers choose Insulation Resistance Meters with an average price of $134.06, and the top brands are KAIWEETS, Fluke, Supco, allsun, UEi Test Instruments, BTMETER, UNI-T, AOPUTTRIVER, INFURIDER, AIOMEST, WapoRich And GOLDCHAMP

Then our expert-level editors reviewed all those quality items and selected the top 30 Insulation Resistance Meters for you, We have researched hundreds of sellers and picked the top sellers for Test, Measure & Inspect, including Amazon Resale, ADVENTURER'S BAG, KAIWEETS Direct, Nygmat, ALLOSUN, WIDESTEP, bestmeter, AOPUTTRIVER-US, Amazon.com, AmericanMeterWarehouse INC, Xin Tester Tools Factory Store And AIOMEST-US. The UNI-T 1000V Megohmmeter Insulation Megger Teste... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 81 consumers with an average rating of 4.5.

We've helped a lot of satisfied users get the right Industrial & Scientific product based on their needs, and save lots of time for them to pick Insulation Resistance Meters to buy.


Written By Thomas Joseph

Thomas Joseph has over 7 years of working experience with a reputation science laboratory. He is a father, a writer, and a pet lover. He would be sharing his expert knowledge on Industrial and scientific equipment to help us make the right purchase.