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LTW425 High Resolution Loop Tester

The Megger LTW425 High Resolution Loop Tester to 1 ohm resolution makes earth loop testing safer & easier. Its features include 50 V to 440 V operation, 110 V centre-tap loop testing.

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  • Competitive quote
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Manufacturer's RRP

822.00 incl. VAT)
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  • Competitive quote
  • Expert technical advice/demos
  • Trusted aftercare support




Megger LTW425 2 Wire Non-Tripping High Resolution Loop Testers

Measuring loop impedance to 3 decimal places make this 2-wire non-tripping loop tester highly desirable. This feature means that contractors can use this instrument to make measurement close to the source of supply. It calculates the PFC and PSCC value up to 40 kA.


Megger LTW425 Key Features:

  • 2 Wire Non-tripping loop tester
  • 50 V to 440 V operation
  • 110 V centre-tap loop testing
  • CAT IV installation testing
  • AUTO start - operation
  • 0.001 Ω resolution


What comes with the Megger LTW425?

  • Megger LTW425 Earth Loop Tester
  • BS1363 to 3 x 4mm Socket Leadset
  • 2 Wire Leadset with Croc Clips
  • Schuko Plug Test Lead - EU-SC
  • AU/NZ Plug Test Lead - EU-AU
  • Hard Carry Case
  • User CD


Comparison Chart for: Megger LTW425 High Resolution Loop Tester

 2Wire Non Tripping Loop Testing 
2Wire Fast Test (High Current)
110V to 280V Applications
50V to 440V Applications
Phase to Phase Testing
20KA PFC Range
40KA PFC Range
0.01Ω Resolution
0.001Ω Resolution
AUTO Noise Detection
AUTO Start Loop Test
Voltage Measurements
Frequency Measurements
Max Zs Display
R2+R2 Display
Backlit Display (White Light)
BuiltIn Front Cover (Foldaway)
IP54 Weatherproof Case
Accepts Rechargeable Batteries
Test Result Storage
Product Downloads


Accessory Code Description Price (Ex VAT)
1000-562 Probe Cap [clear] bag of 20 £26.00 ADD
1001-883 Test Lead Set 3- wire Red/Black/Green with prods/clips (Special plug) price on request
1004-323b SIA10 Interface Adaptor UK 3-Lead (Boxed) £39.00 ADD
1005-469 SIA10 Socket Interface Adaptor LTW £50.00 ADD
6231-601 UK Mains Plug Leadset £22.00 ADD