Klein Tools Professional Series MM2000 Digital Multimeter

True RMS Electrical Testing for Highly Accurate Results


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What's special about this electrical test tool?

  • Highly accuracy True RMS AC measurement increases the overall safety of your electrical work and provides more reliable data for diagnosis and testing
  • Measures DC current and voltage, duty cycle, resistance, capacitance, diodes, circuit continuity, and temperature, in an all-in-one solution for your electrical testing needs
  • Auto-ranging capability speeds up testing by eliminating the time consuming guesswork of manual ranging
  • Ideal for industrial electrical work, HVAC, and even light residential use for hobbyists
  • Click for More Features
cULus ListedETL Listed

The Professional Series MM2000 from Klein Tools® is a highly accurate tool for measuring AC/DC voltage, current, and many other electrical units of measure. The MM2000 True RMS testing ensures reliable, high resolution results, and its auto-ranging feature saves time by eliminating needless steps in the testing process. Professional electricians and hobbyists alike will find this tester an indispensable weapon in their arsenals.


KT-MM2000 Professional MM2000 Digital Multimeter - MM2000 TrueRMS Multimeter
- Thermocouple
- Test Leads
- 9V Alkaline Battery
3.5" W x 1.875" D x 7" H
[7.01 cm x 5.0 cm x 15.01 cm]
KT-69410 Klein Tools Test Leads 36" L
KT-69401 Canvas Carry Pouch 13.75" W 8" H
  • Backlit LED display with large digits enables testing in any lighting, including bright light/sunlight, as well as inside attics, walls, and other dark areas
  • Molded test lead holsters reduce the risk of lost or damaged leads and improves cable management
  • Includes a thermocouple test lead for measuring temperature, saving money and toolbox space because you won't have to purchase a separate thermometer
  • Rugged hard plastic construction stands up to the impact-prone conditions of construction, remodeling, and shop environments
  • Integrated foldable stand frees up your hands for other tasks, speeding up measurement and record gathering



Operating Altitude 6560 ft (2000 m)
Relative Humidity 75% max operating
Operating Temperature 32°F to 104°F (0°C to 40°C) < 75% R.H.
Storage Temperature -4°'F to 140°F (-20°C to 60°C) < 80% R.H.
Accuracy Temperature (18°C to 28°C) 64°F to 82°F < 75% R.H.
Temperature Coefficient 0.1*(specified accuracy) / °C
Sampling Frequency 3 samples per second
Dimensions 3.5" W x 1.875" D x 7" H
(7.01 cm W x 5 cm D x 15.01 cm H)
Weight 14 oz.
Calibration Accurate for one year
CAT Rating CAT III 1000V, CAT III 600V
Listing ETL & cETL standard UL 3111-1 listed
Pollution Degree 2
Accuracy  ± (% of reading + # of least significant digits)


AC Voltage Measurement

  • Overload Protection: 1000V RMS
  • RMS Frequency: 40Hz ~ 20kHz
  • Input Impedance (Nominal): > 10MΩ, < 100pF
  • Input Impedance (Low-Z): > 3kΩ, < 200pF
  • Response: True RMS


Range Resolution  Accuracy
400mV 0.1mV 40Hz to 400Hz 400Hz to 20kHz
4V to 400V 1mV to 1V ± (0.75% + 5 digits) ± (.2.5% + 10 digits)
1000V 1V ± (2.0% + 8 digits)
  ± (0.75% + 8 digits) ± (2.0% + 8 digits)


DC Voltage Measurement

  • Overload Protection: 1000V
  • Input Impedance (Nominal): > 10MΩ, < 100pF
  • Input Impedance (Low-Z): > 3kΩ, < 200pF
  • Response: True RMS


Range Resolution Accuracy
400mV to 400V 0.1mV to 1V ± (0.5% + 4 digits)
1000V 1V ± (0.8% + 10 digits)


Resistance Measurement

  • Overload Protection: 600V RMS


Range Resolution Accuracy
400Ω to 4MΩ 0.1Ω to 0.001MΩ ± (0.8% + 4 digits)
40MΩ 0.01MΩ ± (1.5% + 4 digits)


Capacitance Measurement

  • Overload Protection: 600V RMS
  • 4nF Range: Stated accuracy with film capacitor or better.


Range Resolution Accuracy
4nF to 40μF 0.001nF to 0.01μF ± (3.0% + 6 digits)
200μF 0.1μF ± (4.0% + 6 digits)


Frequency Measurement

  • Overload Protection: 600V RMS
  • Sensitivity: 0.7V RMS at 1MHz


Range Resolution Accuracy
9.999Hz to 999.9kHz 0.001Hz to 0.1kHz ± (0.5% + 2 digits)


Temperature Measurement

  • Overload Protection: 600V RMS


Range Resolution Accuracy
-58° to 1832° F 0.1 to1° F ± (3.0% + 5.4°F)
0° to 1,000° C 0.1 to1° C ± (5.0% + 3.0°C)


Duty Cycle Meaurement

  • Overload Protection: 600V RMS
  • Frequency: 0.5Hz ~ 100kHz (pulsewidth > 2μsec)


Range Resolution Accuracy
0.1% to 99.9% 0.10% ± (0.2% per kHz + 0.1% + 5 digits)


AC Current Measurement

  • AC Overload Protection:
    • uAmA Input: 400mA (F400mA/1000V fuse)
    • A Input: 10A (F 11A/1000V fuse)
  • DC Overload Protection
    • uAmA Input: 400mA (F400mA/1000V fuse)
    • A Input: 10A (F 11A/1000V fuse)
  • Max Input Current:
    • mA Input: 400mA DC / AC RMS
    • 10A Input: 10A DC / AC RMS


Range Resolution  DC Accuracy AC Accuracy
40HZ ~ 400Hz
400μA ~ 400mA 0.1μA ~ 0.1mA ± (1.0% + 3 d) ± (1.2% + 3 d)
10A 0.01A ± (3.0% + 5 d) ± (3.0% + 5 d)


Diode Test

Overload Protection Test Current (typical) Open Circuit Voltage Range
600V RMS 0.25mA Appx. < 1.6V DC 2.0V DC


Continuity Test

Overload Protection Open Circuit Voltage
600V RMS Appx. 0.44V






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