Extech GRT300-NISTL Earth Ground Resistance Tester
Request a quote
Extech GRT300-NISTL is a 4-wire earth ground resistance tester with ranges from 2 to 2000 Ohm, supporting 4-wire, 3-wire, and 2-wire testing with NIST traceability.
Product details
| Model | GRT300-NISTL |
| Manufacturer | Extech |
| Category | Ground Resistance Testers |
| Availability | Made to order |
Description
Overview
The Extech GRT300-NISTL is a portable earth ground resistance tester designed for measuring ground resistance across four measurement ranges (2 to 2000 Ohm). It supports multiple testing configurations including 4-wire, 3-wire, and 2-wire methods, making it suitable for grounding system verification in residential, commercial, and industrial installations.
Key Features
- Four measurement ranges: 0–20 Ohm, 0–200 Ohm, 0–2000 Ohm
- Multiple testing configurations: 4-wire, 3-wire, and 2-wire methods
- Large dual-line LCD display for easy reading
- Automatic I (current) and P (potential) spike detection and rejection
- Automatic zero adjustment
- Test Hold function for convenient measurement capture
- AC Earth Voltage measurement
- Autoranging capability
- Data Hold function
- Auto Power-off for extended battery life
- Limited NIST traceable calibration certificate included
Applications
- Electrical grounding system verification and maintenance
- Safety compliance testing for commercial and industrial facilities
- Residential electrical inspection
Included Accessories
- Test leads with alligator clips
- 4 auxiliary earth bars
- Hard carrying case
- Eight 1.5V AA batteries
- Limited NIST traceable certificate
Specifications
Request a quote
Extech GRT300-NISTL Earth Ground Resistance Tester
Response within 24 hours
No obligation
Direct communication