Brand
Tentech
Tentech is a Brazilian manufacturer of earthing and grounding test equipment, and the products here are ground resistance testers.
The range includes high frequency ground testers, which measure at frequencies closer to lightning impulse behaviour than conventional low frequency instruments, and that matters for lightning protection assessment. Confirm the resolution and frequency range you need.
The Tentech EM-4058 is a professional ground resistance tester with 0.01 Ω resolution and a 20 kΩ range. It features multiple test frequencies (270 Hz to 1470 Hz), Wenner method for soil resistivity, built-in memory, USB interface, and a printer. Ideal for substations, industrial plants, and distribution networks.
The Tentech TM-25R is a high-frequency ground resistance tester designed for accurate measurement of tower grounding without disconnecting ground wires. With a 25 kHz test frequency and 300 Ω range, it minimizes the influence of adjacent towers, ensuring reliable results. Bluetooth connectivity and a built-in printer enhance field efficiency.