Clamp meters and multimeters / Milwaukee
CLAMP METER

Milwaukee 2237-20 clamp meter

Checked 2026-10-17 against Milwaukee's US product page by Rob, licensed electrician

The Milwaukee 2237-20 is a clamp meter, sold on its own. Milwaukee publishes CAT III 600 V safety rating, 600 A AC current (max range), 600 A DC current (max range), 600 V AC voltage (max range). In the box: Clamp Meter 2237-20, Test Lead Set, 2x AA Batteries, Manual. Source: Milwaukee's US product page, checked 2026-10-17.

Key specs

Safety rating (IEC 61010 CAT)
CAT III 600 V
AC current, max range
600 A
DC current, max range
600 A
AC voltage, max range
600 V
DC voltage, max range
600 V
True-RMS
Yes
Jaw opening
1.3 in
Batteries (cells)
Alkaline (AA)

Not on Milwaukee's US product page for the 2237-20: Display resolution; Warranty. We do not guess.

In the box

  • IncludedClamp meter: Clamp Meter 2237-20
  • IncludedTest leads: Test Lead Set
  • IncludedBatteries: 2x AA Batteries
  • Not listedCase or holster: not in the maker's box list

Model number ending "20": Bare tool: no battery or charger. How Milwaukee model numbers work.

Find 2237-20 prices on Amazon Find 2237-20 prices at Acme Tools Find 2237-20 prices at eBay New tab, US retailers. Search results open where no exact listing is on file. Check the listing says 2237-20; marketplace sellers vary.
  • US retailer, ships from the US
  • Free shipping over $199
  • Family owned since 1948
  • Acme Tools, as published on its site, checked 2026-10-17

All specs

Safety rating (IEC 61010 CAT)CAT III 600 V
AC current, max range600 A
DC current, max range600 A
AC voltage, max range600 V
DC voltage, max range600 V
True-RMSYes
Jaw opening1.3 in
Batteries (cells)Alkaline (AA)
Non-contact voltage detectionYes
Backlit displayYes

Ratings are Milwaukee's published figures from its US product page, listed under Sources. Anything not on that page is left out rather than guessed. Check this against another model.


Find the 2237-20 at Amazon

Quick answers

What is the 2237-20's safety (CAT) rating?

Milwaukee rates it CAT III 600 V. CAT IV covers the service entrance and utility side, CAT III distribution-level circuits such as panels and feeders; the lower of the meter's and the test leads' ratings is the one that applies. See our <a href="/cat-ratings-explained/">CAT ratings guide</a>.

Does the 2237-20 measure DC current?

Yes: Milwaukee lists a DC current range up to 600 A.

Is the 2237-20 true-RMS?

Yes, Milwaukee lists it as true-RMS, so readings on non-sinusoidal loads (drives, dimmers, electronic ballasts) are not averaged.

What batteries does the 2237-20 use?

Alkaline (AA) (dry cells; no tool battery platform).

Does the 2237-20 come with test leads?

Yes: Test Lead Set.

Owner reviews

Read the owner reviews on MilwaukeeTool.com

Manuals and official documents

Sources

  1. Milwaukee US product page 2237-20, retrieved 2026-10-17

Spotted a wrong number? Report a spec error (opens an email with the model filled in). We re-check against the maker's page and correct the page.

Researched by Rob, licensed electrician (Australia). Found an error? Tell us.

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