4120 ER - DIGITAL EARTH RESISTANCE TESTER
The 4120 ER is a "professional instrument". The RUGGED and "O-RING" sealed digital earth tester is built with all the protection you need for outdoor use. The instrument is suitable for the testing of single earth electrodes such as lightning conductors and other small earthing systems. The resistance of conductors such as continuity and conduit coupling joints can also be measured.
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Hoyt Electrical Instrument Works Inc.
23 Meter Street
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