Kewtech KEW4105A Earth Resistance Tester

Kewtech Corporation

Kewtech Approved distributor.

Latest circuit design permits the KEW4105A to operate with a minimum of influence from ground voltage and ground resistance of auxiliary ground spikes.

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Usually Stock or Short Lead Time

£ 284.25 rrp £ 379.00

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(£ 341.10 inc VAT.)

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The Kewtech KEW4105A is an earth resistance tester for testing power distribution lines, in-house wiring system, electrical appliances etc. It also has an earth voltage range for earth voltage measurement.

The KEW4105A makes earth resistance measurement with fall-of-potential method, which is a method to obtain earth resistance value Rx by applying AC constant current I between the measurement object E (earth electrode) and C (current electrode), and finding out the potential difference V between E and P (potential electrode).

In addition to the facility for precision measurement, test leads for simplified two wire measuring system also supplied as standard accessories with the KEW K4105A.


Designed to safety standard IEC 61557.
Dust and drip proof construction in conformity with IEC 60529 (IP54).
Measurement can be made even under adverse weather conditions.
Large, easy-to-read LCD digital display.
Warns when earth resistance of auxiliary earth spikes exceeds the permissible limits.

KEW4105A Specifications:

  • 20 / 200 / 2000Ω earth resistance ranges.
  • Measures earth voltage.
  • Allows earth resistance testing without tripping earth leakage current breakers.
  • 2 wire simplified measurement system included as standard.
  • Withstand Voltage: 3700V AC between the electrical circuit and the housing case.
  • Power Source: 9V DC : R6P (SUM-3) x6.
  • Dust and drip proof.
  • Dimensions: 105(L) x 158(W) x 70(D) mm.
  • Weight: Approx. 550g.
  • Kewtech Model 4105A Warranty: 2 year.


Includes: Test leads, 20m red crock clip lead, 10m yellow crock clip lead, 5m green crock clip lead, simplified measurement probes, auxiliary earth spikes, batteries K4105a Manual and carry case.

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Kewtech KEW4105A Earth Resistance Tester