Milwaukee 2239-21NST CLAMP-GUN™ M12™ Cordless Clamp Meter Kit (NIST Certified)

- Item #: BCI1712764

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CLAMP-GUN™ M12™ Cordless Clamp Meter Kit (NIST)

The CLAMP-GUN™ M12™ Cordless Clamp Meter (NIST) is a heavy duty True-RMS current tester for professional commercial and industrial applications. Powered by the Milwaukee M12 LITHIUM-ION battery, the 2239-21 features an ergonomic pistol grip design which greatly increases comfort and ease-of -use in overhead applications. The unit also provides a wide 1.57” jaw opening to easily handle wire bundles, a thin jaw profile for access to tight spaces, a large white on black display, embedded non-contact voltage detection, and embedded extra bright LED Floodlight. A NIST Certificate of Calibration with Data is also included, needed by many organizations as proof of calibration with the date when NIST Calibration was performed. The 2239-21 is covered by the Milwaukee 5-Year Warranty.


  • Ergonomic Pistol Grip Design Best Orients Jaws and Display
  • Extra Large Jaw Size of 1.57” measuring up to 1000 MCM cable
  • Wide Current Range to 1000 amps AC/DC
  • In-rush current measurement for motor starts
  • Wide Voltage Range to 1000 volts AC/DC
  • CAT IV 600V / CAT III 1000V for greater safety
  • High Contrast, White on Black Display with Backlight for easy reading
  • LED Floodlight and Voltage Detection Add More Value
  • Frequency measurement from 6 Hz to 6 kHz

Since its founding in 1924, Milwaukee has focused on a single vision: To produce the best heavy-duty electric power tools and accessories available to the professional user. Today, the Milwaukee name stands for the highest quality, durable and reliable professional tools money can buy.

Additional Milwaukee Links

Our SKU: Milwaukee 2239-21NST

This product is listed under the following manufacturer number(s):

  • Milwaukee 223921NST

*Denotes a finish or option that has been discontinued

Milwaukee 2239-21NST Product Specifications

Exploded Parts
Owner's Manual
Amperage 1000
Application Meter
Backlit Yes
Battery Type Lithium Ion
Capacitance Yes
Continuity Verification Yes
DC Voltage 1000
Display Type High Contrast White on Black
Hold Yes
Indication Visual
NIST Certified Yes
Non-Contact Voltage Yes
Number of Batteries 0
Ohms 600 kOhms
Product Weight 2.6
Safety Category Rating CAT IV 600V / CAT III 1000V
Switch Type Dial

Installation Resource Center

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