Extech GRT300 4-Wire Earth Ground Resistance Tester (2 to 2000 Ohm) w/NIST Calibration 100 Pint Dehumidifier providing a significantly deeper clean

providing a significantly deeper clean

Streamlined User Interface

and a range of specialized tools

Wide Voltage and Frequency Range

and Buffer is the ultimate solution for professional cleaners and commercial spaces

Extech GRT300 4-Wire Earth Ground Resistance Tester (2 to 2000 Ohm) w/NIST Calibration 100 Pint Dehumidifier providing a significantly deeper cleanThe Extech GRT300 NISTL is a professional grade ground resistance tester built for reliability and versatility across a wide range of electrical environments. With its ability to perform 2 wire, 3 wire, and 4 wire testing, it delivers flexible and accurate measurement of earth ground resistance and soil resistivity, critical for verifying grounding system performance in industrial, utility, and telecom settings. This handheld unit features a user