Tuesday, 28 July 2020 13:05 Written by 
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The TM25R grounding resistance meter for high frequency has been developed  to ensure Testing of the power transmission towers grounding (G) without interruption of the power. This is the appropriate tool for a fast, safe and reliable grounding resistance measurement in each tower of a working line transmission, without disconnecting the ground wire.

The TM25R has a Bluetooth interface that allows remote control of it through a tablet with BlueLogg software. With it you can save the photos of the towers and the GPS coordinates of each. It also allows you to record voice comments for each measurement. This equipment is powered with its universal charger, from a built-in rechargeable battery. It is a strong equipment, easy to carry, resistant to the hard weather and geographical features of the tropical and high-mountain regions, that is why it is described as an excellent product for field works under the most severe environmental conditions.



  • Intended for measurement of earth resistance of electricity pylons
  • Minimizes the influence of adjacent pylons, connected by the guard cable
  • Operation frequency: 25 kHz
  • Resistance reading: up to 300 Ω
  • Automatic current injection
  • Built-in memory and printer
  • Rechargeable battery


Specifications    TM25R
Measurement ranges

0 - 300 Ω


± 2.5 % of reading ± 1 digit

Operating Frequency 


Test Current 20mA automatic

USB & Bluetooth 

Battery charger Internal or external rechargeable battery, 12 V. Internal battery autonomy: at least 2 hours.

 -5 °C to 50 °C. (Operating)

-15 °C to 65 °C (Storage) 

Up to 95% RH (non condensing)


4.9 Kg (Approx)


340 x 295 x 152 mm

Read 6231 times Last modified on Wednesday, 01 February 2023 05:10
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