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Red handheld ETCR 3620 milliohm tester with test leads

ETCR

ETCR 3620 Portable Milliohmmeter DC Low Value Resistance Tester electrician tool

SKU CH-8GCH-Q9230 MPN 3620

Measures low-value DC resistance from 1 mΩ to 20.0 kΩ with four-wire precision and 200 stored readings

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Lightweight and portable for easy on-site use
  • 4-wire measurement method improves low-resistance accuracy
  • Swift calibration function enhances measurement precision
  • Stores 200 data groups without battery loss
  • Backlit display enables readings in dim conditions

Portable Milliohmmeter For Field Technicians

The ETCR 3620 is a handheld DC low-value resistance tester designed for electricians and maintenance engineers. It measures contact resistance on switches, connectors and relays, plus winding resistance on motors and transformers. The 4-wire measurement method with simultaneous AC/DC detection supports precision work on ground grids and metal riveting. A rechargeable 7.4 V 2000 mAh lithium battery powers the unit.

Thermals Noise And Power Draw

The instrument draws test currents matched to each range, from 1.2 A on the 200 mΩ range down to 2.1 mA on the 20 kΩ range. No fan or active cooling is mentioned, so operation stays silent in normal use. Battery power avoids mains noise and lets the tester work in remote locations. The backlit display remains readable in dim environments.

200 Groups Of Non Volatile Data Storage

Up to 200 measurement groups are retained even after power loss or battery replacement. Two 0.8 m red and black test lead sets are included for immediate 4-wire connection. The calibration function improves accuracy across all six ranges spanning 1 mΩ to 20.0 kΩ. Buyers needing wireless logging or PC software integration should look elsewhere.

How it compares

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

Price $112.99
Pricier than about 56% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameETCR
Model name3620
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I connect the 0.8 m test leads for a four-wire measurement and what step is often missed?

Plug both red and black lead sets into the four terminals, then use the swift line resistance calibration before measuring so the lead resistance is cancelled out.

Which part will need replacement first during the three-year parts period?

The 7.4 V 2000 mAh rechargeable lithium battery will degrade with charge cycles and is the only consumable component listed.

At what point does the 1.2 A test current on the 200 mΩ range become a limitation?

Sustained use at the 1.2 A test current on the lowest range will heat the battery and leads, so the thermal limit of the power supply appears first.

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