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Electrical Tools - Resistance Testers

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Extech 380260

Autoranging Digital Megohmmeter

This autoranging megohmmeter measures insulation resistance up to 2000MΩ. Choice of 250, 500 or 1000VDC test voltages. The large backlit dual display indicates test voltage output and insulation resistance. Low resistance, continuity and AC/DC voltage measurement functions. Other features include automatic discharge at the end of test, protective holster with stand, power lock on feature and data hold. Complete with test leads, carrying case and 6 AA batteries.

Extech 380320

Analog Insulation Tester

The Extech 380320 is an Analog Insulation Tester with a large, easy to read analog display. It features a live circuit warning which displays the actual AC voltage measurement. It also includes an automatic discharge circuit, lock power on feature for extended test times, and insulation resistance up to 400 MΩ. Complete with heavy duty test leads, alligator clip test lead, 6 AA batteries, hanging strap, and hard carrying case.

Extech 380360

Digital Megohmmeter

The Extech 380360 is a 1000 V Megohmmeter with an automatic 3 minute test. It has three test voltages of 250 V, 500 V and 1000 V, plus insulation resistance up to 2000 MΩ. Automatic discharge when the safety "Press to Test" button is released. Complete with 6 AA batteries, heavy duty 0.8 m (2.5 ft) test leads, alligator clip, large probe, and case with neck strap.

Extech 380363

Digital High Voltage Insulation Tester

This Extech insulation tester measures up to 10GΩ with 250V, 500V and 1000V Test Voltages. Features include: Lo-Ohms for testing connections, analog bargraph for viewing trends, AC/DC Voltage measurement to 999V, manual data record/recall function (9 sets), and live circuit display warning and beeper. Can be used to test motor, transformer windings, instruments, and appliances, check for moisture in wire and cable assemblies, safely evaluate a new wiring installation, and check for carbon tracking in breakers, relays, and switches. Extech Insulation Testers offer high sensitivity to assure reliable monitoring of low resistance motor windings. Complete with carrying case, test leads, and 6 x AA batteries.

Extech 380395

High Voltage Digital Insulation Tester (110V)

With the Extech 380395, measure insulation resistance up to 60 GΩ with test voltages of 500 V, 1000 V, 2500 V, and 5000 V. Its features include polarization index measurement (PI), dielectric absorption ratio measurement (DAR), AC/DC voltage measurement up to 600 V, peak and relative functions, and a 1 min to 15 min timer function for IR measurements. Comes with test leads, eight C batteries, 120 V AC adaptor, heavy duty carrying case, and a user manual.

Extech 380396

High Voltage Digital Insulation Tester (220V)

With the Extech 380396, measure insulation resistance to 60 GΩ with test voltages of 500 V, 1000 V, 2500 V, and 5000 V. It features several measurements including polarization index (PI), dielectric absorption ratio (DAR), and AC/DC voltage to 600 V with a min/max function. It also has peak and relative functions, as well as a 1 to 15 minute timer function for IR measurements. Comes with test leads, eight C batteries, 220 V AC adaptor, heavy duty carrying case, and user manual.

Extech 380460

Precision Milliohm Meter (110V)

380460 is a Precision Milliohm Meter. High accuracy and performance for low resistance measurements. Portable milliohm meter provides resolution to 0.1mΩ. Compact, durable field service housing with protective cover. Manual zero display adjust and overrange indication. Complete with 4-wire cables with Kelvin clip connectors.

Extech 380462

Precision Milliohm Meter (220V)

The Extech 380462 is a Precision Milliohm Meter (220 V). Performance for low resistance measurements. Equipped with a large 18 mm, 1999 count LCD screen. Featuring manual, zero display adjust and overrange indication. CE certified. Complete with 4-wire cables with Kelvin clip connectors.

Extech 380465

Kelvin Clip Test Lead Set

The Extech 380465 is a Kelvin Clip Test Lead Set for Milliohm Meter Models 380460 and 380462. The 380465 is built from compact, durable field service housing with a protective cover.

Extech 380560

High Resolution Precision Milliohm Meter (110VAC)

The 380560 benchtop meter provides resolution down to 0.01mΩ using 4-wire Kelvin clip test leads. Featuring 7 ranges for wide low resistance measurements, 1999 count display with 0.8" digits, automatic zero function. Built-in comparator for Hi/Lo/Go resistance testing or selection. Complete with 4-wire cables with Kelvin clip connectors and power cord.

Extech 380562

Extech 380562 High Resolution Precision Milliohm Meter (220 VAC)

Compact and precise, the Extech 380562 Milliohm Meter has 7 ranges and measures down to 0.01 mΩ using 4-wire Kelvin clip test leads. Measurements are displayed on the unit's large 20.3 mm (0.8 in), 1999-count LCD. It comes with a built-in comparator for Hi/Lo/Go resistance testing or selection. Complete with 4-wire cables with Kelvin clip connectors and power cord.

Extech 380565

Kelvin Clip Test Lead Set

The 380565 is a set of Test Leads with Kelvin Clips for the Extech 380580 battery powered milliohm meter. Use these test leads and kelvin clips as extras or spare.

Extech 380580

Battery Powered Milliohm Meter

The 380580 is a Battery Powered Milliohm Meter. This milliohm meter features a high accuracy, a high resolution, portable milliohm meter battery operated for field use, four terminal Kelvin measurements, and Over-temperature and over-voltage protection. CE certified. Complete with 8AA batteries, and 2 sets of test leads (4 wire with 4 alligator clips and 4 wire with 2 Kelvin alligator clips).

Extech 382153

Replacement Earth Bars

The Extech 382153 is a set of two Replacement Earth Bars designed for use with the model 382152 Earth Ground Resistance Tester.

Extech 382154

Replacement Test Leads

The Extech 382154 is a set of four replacement test leads for the model 382152 Earth Ground Resistance Tester.

Extech 382252: Earth Ground Resistance Tester Kit

Earth Ground Resistance Tester Kit

The 382252 is an Earth Ground Resistance Tester Kit which includes all hardware necessary to measure earth ground in 3 ranges from 20 to 2000 Ohms. Also tests AC/DC Voltage, resistance and continuity. Featuring Automatic zero adjustment and three earth ground resistance ranges 20Ω/200Ω/2000Ω. Complete with test leads, 2 auxiliary earth bars, carrying case, protective rubber holster and six 1.5V AA batteries.

Extech 382253

Earth Bars (2pc)

The Extech 382253 are Earth Bars for the 382252 Earth Ground Resistance Tester. Use as replacements or spare bars. The 382253 earth bars are durable, lightweight, and come in a pack of two.

Extech 382254

Test Leads (5pc)

The Extech 382254 is a replacement set of test leads for the 382252 Earth Ground Resistance Tester Kit. The test leads are color-coded and durable.

Extech 382357

Clamp-on Ground Resistance Tester

The 382357 is a Clamp-On Ground Resistance Tester that enables non-contact measurements of ground conductors. True RMS AC Leakage current range of 0.2mA to 30A with 1.000mA resolution. Programmable Datalogging with 116 data points. Performs without the need for auxiliary spikes. Complete with 9V battery, Resistance check plate and durable metal storage case.

Extech GRT300

4-Wire Earth Ground Resistance Tester

The GRT300 measures earth ground in 4 ranges from 2 to 2000 Ohm. 4-wire, 3-wire, and 2-wire testing. Large dual line LCD. Automatic I (current) and P (potential) spike check. Test Hold function for easy operation. Autoranging, Automatic Zero adjustment, Data Hold and Auto Power off. AC Earth Voltage. Overrange and low battery indication. Complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, and eight 1.5V AA batteries.

Extech GRT350

4-Wire Earth Ground Resistance/Resistivity Tester

The Extech GRT350 is a 4-Wire Earth Ground Resistance and Resistivity Tester which measures earth ground resistance from 2 Ohm to 2000 Ohm and resistivity from 0.06 ohm-m to 628 ohm-m. The GRT350 supports 4-wire, 3-wire, and 2-wire testing. It has a large dual line LCD, automatic spike check, test hold function, auto ranging, data hold, and auto power off function. This tester can also store and recall up to 200 test results and has over range and low battery indications. Product is complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, user's manual, and eight 1.5 V AA batteries. CE certified with a CAT IV 300 V safety rating.

Extech MG300

13 Function Wireless True RMS MultiMeter/Insulation Tester

The Extech MG300 is a True RMS Multimeter with a built in insulation resistance tester that features wireless data streaming for remote monitoring and datalogging. By adding insulation testing capabilities to the ubiquitous digital multimeter, electricians are always equipped for insulation testing. This feature helps make the MG300 a more routine part of predictive maintenance with faster troubleshooting and repairs without additional tools. The rugged and waterproof (IP67-rated) combination meter includes a digital insulation resistance tester (or megohmmeter) with 4 different test voltages for measuring resistance up to 4G Ω with 0.001 MΩ resolution. Complete with remote receiver with USB cable, windows compatible software, heavy duty test leads, alligator clip test lead, Type K bead wire temperature probe with adapter, carrying case, and 6 AA batteries.

Extech MG300-ETK

Electrical Troubleshooting Kit

The Extech MG300-ETK Electrical Troubleshooting Kit includes three compact tools that are indispensable at a customer site for electrical installation, troubleshooting, and repair. The first tool in the kit is the MG300, a 13 Function Wireless True RMS Multimeter/Insulation Tester featuring 125 V, 250 V, 500 V, and 1000 V test voltages, plus insulation resistance from 0.001 MOhm to 4000 MOhm and many other functions at a CAT IV 600 V safety rating. The second tool is the 42509 Dual Laser IR Thermometer with Color Alert which measures IR temperature up to 510°C (950°F). The third tool in this kit is the MA430T 400 A True RMS AC/DC Clamp Meter with a built in non contact voltage detector, 6 additional functions, and a CAT III 600 V safety rating.

Extech MG302

13 Function Wireless True RMS MultiMeter/Insulation Tester

The Extech MG302 is a Wireless True RMS Multimeter with a built in insulation resistance tester. By adding insulation testing capabilities to this CAT IV-rated digital multimeter, electrical troubleshooters will always be equipped for the job. The digital insulation resistance tester, or megohmmeter, comes with four different test voltages for measuring resistance up to 4G Ω with 0.001 MΩ resolution. The multimeter also includes useful extras like duty cycle measurements, milliamp readings, and a built-in wireless data recording for safer troubleshooting and maintenance on moving equipment. The MG302 is waterproof (IP67-rated) and comes with a remote USB receiver, Windows compatible software, test leads with alligator clips, Type K bead wire temperature probe with adapter, carrying case, six AA batteries, and a user manual.