Manufacturer Manufacturer | Show |
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DC Voltage Insulation Testing Selections DC Voltage InsulationTesting Selections |
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Safety Rating Safety Rating |
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Maximum Resistance Maximum Resistance |
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Measures Measures |
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Environmental Rating Environmental Rating |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Batteries Included Batteries Included |
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Battery Size Battery Size |
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Display Count Display Count |
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Maximum DC Voltage Maximum DC Voltage |
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Maximum AC Voltage Maximum AC Voltage |
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About Safety Ratings for Electrical Testing
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Insulation Testers
Measure electrical resistance as an indication of insulation quality in equipment such as motors, generators, and switchgear.
Digital displays show a numeric reading on an LCD. Display count is an industry designation and not an actual value. For example, a 1,000-count tester shows numbers up to 999. A higher display count means the tester can give a more precise measurement.


Manufacturer Model Number | Display Type | Safety Rating | Measures | Max. Resistance | Resistance Accuracy | DC Voltage Insulation Testing Selections | AC Voltage | DC Voltage | Display Count | Environmental Rating | Includes | Each | |
MIT310 | Digital | CAT III, 600V | Resistance, AC Voltage, DC Voltage | 999 megohms | 3% | 250, 500, 1,000 | 0-600 | 0-600 | 1,000 | IP54 | Alligator Clips, Carrying Case, Test Leads | 00000000 | 0000000 |
MIT410/2 | Digital | CAT III, 1,000V; CAT IV, 600V | Resistance, AC Voltage, DC Voltage | 200 gigohms | 2% | 50, 100, 250, 500, 1,000 | 0-600 | 0-600 | 1,000 | IP54 | Alligator Clips, Carrying Case, Probe Tips, Test Leads | 00000000 | 00000000 |
Hand-Crank Insulation Testers
Turn the crank to generate voltage and measure electrical resistance as an indication of insulation quality in equipment such as motors, generators, and switchgear.
These testers have an analog display that works well for measuring rapidly changing resistance values because you can see the magnitude and rate of change more easily than on a digital display.

Manufacturer Model Number | Safety Rating | Measures | Max. Resistance, megohms | Resistance Accuracy | DC Voltage Insulation Testing Selections | AC Voltage | Includes | Each | |
MJ159 | CAT II, 300V | Resistance, AC Voltage, DC Voltage | 2,000 | 1.25% | 100, 250, 500, 1,000 | 0-600 | Alligator Clips, Carrying Case, Probe Tips, Test Leads | 0000000 | 000000000 |