Best Insulation Resistance Meters Under $200 (2026)
We selected models under $200 by comparing test voltage options, insulation resistance range, safety features, portability, and a computed value score from product specs
The Verdict
- Best Overall: Supco M500 Insulation Tester with Case — Best for general electricians: solid 500V insulation testing with portable case and straightforward controls
- Best Premium: UEi IRT803 insulation resistance tester 600V — Best 600V option: mid-range tester suited for lower-voltage insulation diagnostics with ergonomic handheld design
Top Picks
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1
Best Overall Supco M500 Insulation Tester with Case
Best for general electricians: solid 500V insulation testing with portable case and straightforward controls
Compact insulation tester measures up to 1000 megohms at 500 VAC, with a zone scale for insulation condition and a carrying case. Users note quick, accurate readings and ease of use, though some report short leads
- up to 1000 megohms range
- zone-scale for quick condition assessment
- portable with storage case
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2
BTMETER Megohmmeter 1000V Insulation Resistance Tester
Best budget utility: compact 1000V output and basic digital readout for routine insulation checks
Digital insulation resistance tester with 250/500/1000VDC options and 0.1M–2G range. Includes 1999-count digital multimeter display for AC voltage up to 750V. "Customers report it gets the job done in one step with good accuracy and build quality."
- three voltage testing options
- broad resistance range up to 2G
- dual-functional: insulation tester + voltmeter
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3
M500 Insulation Tester MEGOHMMETER for HVAC, 1000 MΩ@500V
Best for HVAC techs: designed for HVAC insulation testing with 500V capability and HVAC-friendly features
Insulation resistance tester up to 1000 megohms at 500 V AC, compatible with Supco M500. Quick health status indicator for motors, transformers, and HVAC systems. Customers note good quality and effective diagnostics
- high insulation range
- visual health indicators
- portable, case included
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4
M500 Megohmmeter Insulation Tester
Best for precise readings: handheld megohmmeter offering high measured resistance range and clear digital display
Insulation resistance tester compatible with M500 electronic megohmmeter. Measures insulation values up to 1000 MΩ at 500 V. Includes soft case and test leads for storage and use
- high-voltage insulation measurement
- built-in storage for test leads
- comprehensive accessory inclusion
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5
Best Premium UEi IRT803 insulation resistance tester 600V
Best 600V option: mid-range tester suited for lower-voltage insulation diagnostics with ergonomic handheld design
Insulation resistance tester with voltage testing up to 600V and resistance range to 20G. Provides precise readings across multiple test voltages and features CATIV safety rating. Customers note quality, value, and versatile functionality
- multiple test voltages available
- high accuracy 1.5-3% + 5 digits
- up to 20G insulation resistance
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6
UEi IRT807 Insulation Resistance Tester 1000V
Best for 1000V testing: full 1000V capability in a handheld tester for broader insulation testing needs
Insulation resistance tester with 0.01M-2G range and voltage test up to 1000V. Accurate readings and CATIV rated up to 600V. customers note its quality and value
- wide range 0.01M-2G
- voltage test up to 1000V
- CATIV up to 600V