Family Owned & Operated Since 1971• Bakersfield, CA
SKU: GRT300
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.
List price. Volume pricing available.
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.
The Extech GRT300 4-Wire Earth Ground Resistance Tester # GRT300 is manufactured by Extech. Valley Instrument Service is an authorized Extech dealer offering full sales support, NIST-traceable calibration, and expert technical assistance.
Our team can help with product selection, specs, pricing, and application support.
Contact Us or Call (661) 327-8681| Earth Ground Resistance | 2Ω/20Ω/200Ω/2000Ω |
| Earth Ground Resistance Basic Accuracy | ±(2% of reading + 3 digits) |
| Earth Ground Resistance Max Resolution | 0.01Ω/0.1Ω/1Ω/0.01kΩ |
| Earth Voltage | 0 to 300VAC (40 to 500Hz frequency) |
| Earth Voltage Basic Accuracy | ±(2% of reading + 3 digits) |
| Test Current | <2mA |
| Test Frequency | 820Hz |
| Certifications | CE |
| Dimensions | 9.8 × 7.8 × 4.3" (250 × 190 × 110mm) |
| Power | 8 × AA (1.5V) batteries |
| Safety Category | CATIV - 300V |
| Warranty | 2 years |
| Weight | 3.15lbs (1430g) |
Accessories, replacement sensors, and parts for this product family.
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.
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.
Precision source for calibrating process devices and measuring DC process signals from 0 to 24mA or as mV in voltage ranges with a super large LCD that displays readings in mA, as a percent of the 0 to 24mA range or as mV in voltage ranges. Additional features include Touch Keypad and five stored calibration values for fast calibrations. Complete with 9V Battery, calibration cable with spade lug terminals, carrying case, neck strap, and AC Power Adapter.
The Extech 45116 is a pair of replacement impellers for the 45118 Anemometer.