We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Red handheld milliohm meter ETCR 3640 with LCD screen and test leads

ETCR

ETCR 3640 Portable Milliohmmeter Electrician Tool

SKU CH-1E8H-MVRA9 MPN 3640

Measures low DC resistance up to 200 micro-ohms with 5 A test current and stores 200 readings

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Accurate low-resistance readings via Kelvin four-wire method
  • Measures from 1 µΩ up to 200 µΩ range
  • Stores 200 groups of test data internally
  • Delivers up to 5 A test current for precision
  • Large LCD display gives clear, immediate results

Portable DC Low-Resistance Tester

The ETCR 3640 is a handheld milliohmmeter designed for electricians and maintenance engineers who need to verify low-value resistances in the field. It uses a microprocessor-controlled four-wire Kelvin method to eliminate lead resistance from the reading. The instrument stores up to 200 measurement groups in its internal memory for later review. A large LCD presents results clearly during on-site work.

Suited for wiring and contact checks.

This tool suits professionals testing cable conductor resistance, switch and relay contact resistance, or winding resistance in motors and transformers. It also serves grounding-grid continuity checks in power and lightning-protection installations. Buyers who need to measure insulation resistance, high-value resistance, or AC impedance should select a different instrument. The tester is built for DC low-resistance applications only.

Measurement range 1 µΩ to 200 µΩ

The decisive specification is the resistance measurement span of 1 µΩ to 200 µΩ with a maximum test current of 5 A. This range determines whether the meter can resolve the very low resistances found in busbars, heavy cables, and winding coils. If the expected values fall outside this window, another tester will be required. The Kelvin four-wire technique ensures the stated accuracy is achieved.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $148.99
Pricier than about 68% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameETCR
Model name3640
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What comes in the box and do I need to buy test leads separately?

The ETCR 3640 includes the main unit and test leads in a single pack so no extra leads are required for standard measurements.

Which measurement range should I select for transformer winding checks?

Use the 1 µΩ to 200 µΩ range with the built-in 5 A test current for accurate low-resistance readings on windings and coils.

How does the 5 A test current affect real-world contact resistance tests?

The 5 A current drives the Kelvin four-wire method, eliminating lead resistance and giving repeatable milliohm results on switches, connectors and ground-grid joints.

More in Electrical Trade Tools & Kits

Similar items