Ground Resistance Tester Model 3620 (Analog, 3-Point). The Analog Ground Resistance Tester Model 3620 performs ground resistance measurement from 0.5 to 1000Ω with speed and accuracy. The Model 3620 features three-terminal operation for fall-of-potential earth/ground resistance, and may also be used for 2-Point tests. The large 3.1" logarithmic scale is easy to read, with a separate marking for 25Ω. A large Press-to-Measure button allows for easy measurements. A manual zero adjust is provided for accurate readings. Color-coded terminals are easy-to-use banana plug inputs and binding posts.

Ground Resistance Tester Model 3620 Kit - 150 ft. The Model 3620 is also available in complete kit form, which includes instrument, two 150 ft color-coded leads on spools (red and blue), one 30 ft lead (green), two 14.5" T-shaped auxiliary ground electrodes, one set of five spaded lugs, 100 ft tape measurer and carrying bag.

Ground Resistance Tester Model 3620 Kit - 300 ft. The Model 3620 is also available in complete kit form, which includes instrument, two 300 ft color-coded leads on spools (red and blue), two 100 ft color-coded leads (green and black), four 14.5" T-shaped auxiliary ground electrodes, one set of five spaded lugs, 100 ft tape measurer and carrying bag. The Model 3620 is also available in complete kit form that includes instrument, two 300 ft color-coded leads on spools (red and blue), two 100 ft color-coded leads (green and black), four 14.5" T-shaped auxiliary ground electrodes, one set of five spaded lugs, 100 ft tape measurer and carrying bag.

Ground Resistance Tester Model 3620 Kit - 500 ft. The Model 3620 is also available in complete kit form which includes instrument, two 500 ft color-coded leads on spools (red and blue), two 100 ft color-coded leads (green and black), one 30 ft lead (green), four 14.5" T-shaped auxiliary ground electrodes, one set of five spaded lugs, 100 ft tape measurer and carrying bag.

Ground Resistance Tester Model 3640 (Digital, 3-Point). The Digital Ground Resistance Tester Model 3640 performs ground resistance measurement. This direct reading tester measures from 10MΩ to 1999Ω, and is auto-ranging, so it automatically seeks out the optimum measurement range. The Model 3640 is easy to use - simply connect the leads, press to measure, and read. The large LCD (nearly 3/4" high) also indicates low battery status, overrange, and lead reversals. The Model 3640 comes with 3 color coded terminals to aid in easy hookup. Three LED indicators on the front panel continuously warn the user of measurement problems to ensure accurate and reliable tests. The Model 3640 is fuse protected up to 250VAC.