+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Extech Instruments 4-Wire Earth Ground Resistance Tester

Extech Instruments 4-Wire Earth Ground Resistance Tester, GRT300
Extech Instruments 4-Wire Earth Ground Resistance Tester, GRT300
1 of 1 images
Extech Instruments 4-Wire Earth Ground Resistance Tester, GRT300

Tap Tap to Zoom

Questions & Answers

Code: EXT-TL-4WEGRCTR-GRT300

MPN: GRT300

UPC: 793950383018

Product No Longer Available

Product Info for Extech Instruments 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.image

Features/Specifications:

Overrange and low battery indication 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

Included Accessories:

Complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, and eight 1.5V AA batteries

Features of Extech Instruments 4-Wire Earth Ground Resistance Tester

  • Overrange and low battery indication 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

Package Contents:

  • Extech Instruments 4-Wire Earth Ground Resistance Tester
  • Complete with test leads with alligator clips 4 auxiliary earth bars hard carrying case and eight 1.5V AA batteries

Related Products to Extech Instruments 4-Wire Earth Ground Resistance Tester

Image of B5 Systems M4 Multi-Tasker Tool B5 Systems M4 Multi-Tasker Tool (8) List: $40.10 (Save 38%) $24.99 Best Rated
Image of Leatherman Wave Plus 2 models Leatherman Wave Plus (6) List: $140.93 (Save Up to 13%) $129.95 Free 2 Day Shipping
Image of Leatherman Surge 3.1in Multi-Tool Leatherman Surge 3.1in Multi-Tool (20) List: $172.15 (Save $12.20) $159.95 Free 2 Day Shipping
Image of RM Products Military Round Protractor RM Products Military Round Protractor List: $10.99 (Save 32%) $7.49
Image of B&W International GO wheeled tool case with pocket boards 2 models B&W International GO wheeled tool case with pocket boards (1) As Low As (Save Up to 36%) $168.49 Blazin' Deal
Image of Exothermic Pulsefire UBF Flamethrower Exothermic Pulsefire UBF Flamethrower List: $599.99 (Save 22%) $469.99
Image of Throwflame CO2 Pressure Regulator Throwflame CO2 Pressure Regulator List: $299.00 (Save 15%) $255.00 Free 2 Day Shipping
Image of Real Avid Smart-Torq & Driver Master Set Real Avid Smart-Torq & Driver Master Set (10) List: $211.99 (Save 25%) $159.99 Best Rated
Image of Leatherman Skeletool 2.6in Multi-Tool Leatherman Skeletool 2.6in Multi-Tool (2) List: $91.77 (Save $1.82) $89.95
Image of TRYBE Defense Breathing Armor Reusable 4 Layer Water Repellent Face Masks 2 models TRYBE Defense Breathing Armor Reusable 4 Layer Water Repellent Face Masks (10) As Low As (Save Up to 84%) $1.56 Blazin' Deal
Image of Obsidian Arms AR-15 Complete Armorer's Punch Set made-in-usa-flag Obsidian Arms AR-15 Complete Armorer's Punch Set (19) List: $65.00 (Save $3.25) $61.75 Best Rated
Image of Leatherman Ratchet Driver Leatherman Ratchet Driver $39.95
Image of DMOS Delta Steel Shovel 2 models DMOS Delta Steel Shovel $269.00
Image of Leatherman ARC 2.76in Multi-Tool Leatherman ARC 2.76in Multi-Tool (1) $249.95 Free 2 Day Shipping
Image of Real Avid Smart TORQ Tool Set Real Avid Smart TORQ Tool Set (6) List: $115.49 (Save 31%) $79.99 Best Rated
Image of Leatherman Signal 2.73in Multi-Tool 3 models Leatherman Signal 2.73in Multi-Tool (4) $149.95 Free 2 Day Shipping
Image of Avon Protection NH15 CBRN Emergency Escape Hood 3 models Avon Protection NH15 CBRN Emergency Escape Hood $312.00
Image of Blackhawk Thundermaul Blackhawk Thundermaul List: $190.34 (Save 18%) $156.49
Image of MCR Safety NitriShield with Grippaz Technology Disposable Nitrile Gloves, Powder Free Industrial Food Service Grade, 9.5in Length, 6 mil Thickness 2 models MCR Safety NitriShield with Grippaz Technology Disposable Nitrile Gloves, Powder Free Industrial Food Service Grade, 9.5in Length, 6 mil Thickness As Low As (Save Up to 87%) $60.32 Blazin' Deal
Image of Wheeler Engineering Professional Screwdriver Set Wheeler Engineering Professional Screwdriver Set (2) List: $120.99 (Save 28%) $87.49
Image of Leofoto GS-3 Lightweight Clamp Support Mount - Arca QR Clamp Leofoto GS-3 Lightweight Clamp Support Mount - Arca QR Clamp List: $199.00 (Save 10%) $179.10
Image of Leofoto WN-01/SW-01 Car Window Clamp Kit Leofoto WN-01/SW-01 Car Window Clamp Kit List: $134.00 (Save 28%) $96.48 20% Instant Savings
Image of Throwflame ARC Flamethrower Backpack Kit 2 models Throwflame ARC Flamethrower Backpack Kit List: $299.00 (Save 15%) $255.00 Final Sale
Image of L.E. Wilson CT Kit 17-45 Trimmer w/ Micro Stop made-in-usa-flag 2 models L.E. Wilson CT Kit 17-45 Trimmer w/ Micro Stop As Low As (Save 12%) $242.00

Extech Instruments 4-Wire Earth Ground Resistance Tester Unavailable & Discontinued Models

List of Unorderable Models

  • Extech Instruments 4-Wire Earth Ground Resistance Tester, GRT300 , MPN: GRT300 , UPC: 793950383018 , Code: EXT-TL-4WEGRCTR-GRT300
  • Extech Instruments 4-Wire Earth Ground Resistance Tester With Limited Nist, GRT300-NISTL , MPN: GRT300-NISTL , UPC: 793950383117 , Code: EXT-TL-4WEGRCTR-GRT300-NISTL
Compare (0)
1 item has been added
Add at least two items to compare