HT Instruments Installation Testers Earth ground meter accessories 622907 - HT Instruments 1005400, HT Instruments KIT TERR Earth ground meter accessories, part number 1005400, provide essential tools for accurate ground resistance measurement. Manufactured by HT Instruments, these accessories enhance the performance of earth ground meters. They are typically used in electrical installations to ensure safety and compliance with standards. HT Instruments 1005400 KIT TERR Earth Ground Meter with Leads and Spikes