On Flir Ex Series Cameras
GRT350: 4-Wire Earth Ground Resistance/Resistivity Tester
To ensure good ground system installation, use Extech's GRT350 Tester to check the resistance of the ground as well as the soil resistivity before you install your ground rods. This tester includes all hardware necessary to measure Earth Ground Resistance in 3 ranges, from 20 to 2000Ω, and Resistivity from 0.06 to 628kΩm. Electricians and technicians should also check their ground system periodically for predictive maintenance ensuring the resistance level doesn't exceed the allowed safety level.
** This item is BRAND NEW – not refurbished.