Greenlee® TrueRMS Digital Multimeter

Uncompromised Accuracy From a Simple Multimeter


What's special about this electrical tester?

  • Measures voltage, resistance, diode, and continuity in any electrical circuit, employing True RMS for the most accurate results
  • Non-contact voltage detection allows you to safely check for live current on any wire
  • Comfort-contoured shape, large dial, and strategically placed buttons make one-handed operation a pleasure
  • Ideal for anyone performing electrical testing, from hobbyists to electronics professionals
  • Click for More Features

When it comes to electrical testing, getting accurate results is usually synonymous with complex controls and an often stressful testing experience. Greenlee® took a different approach with the DM-300. This digital multimeter features TrueRMS testing for maximum precision, displaying your test results on a large backlit screen for ease reading. The handheld, contoured form factor is comfortable to grip, and with the Lifetime Warranty, this meter is guaranteed not to let you down.

Part #DescriptionWeightPrice
GL-TSG-3Replacement Sure Grip Test Leads0.32 lb (0.15 kg)
Quick Ship
GL-TC-20Replacement Carry Case0.45 lb (0.20 kg)
Quick Ship
  • Includes everything you need to get right to work:
    • DM-300 Digital Multimeter
    • Sure Grip™ rugged test leads
    • 9V battery
    • Canvas carry case to keep everything together
  • Data hold feature captures tests results for easy record keeping
  • Automatically turns off after a few minutes of inactivity, preserving battery life for cost-efficient operation
  • Large, backlit display provides clear results in any area, including inside dark walls, attics, and crawl spaces
  • Lifetime Warranty against manufacturing defects


Property Value
Voltage Measurement 600.0 mV; 6.000, 60.00, 600.0, 1000V
Resistance Measurement 600.0 Ω; 6.000, 60.00, 600.0 kΩ;
Display 6000-count LCD
Sampling Rate 5 per second
Measurement Category CAT IV, 600V; CAT III, 1000V
Operating Temperature 14 °F to 88 °F (–10 °C to 31 °C), 0% to 80% relative humidity (noncondensing)
Storage Temperature 88 °F to 122 °F (-31 °C to 50 °C), relative humidity decreasing linearly
from 80% to 50%
Altitude 6500' (2000 m)
Pollution Degree 2
Weight 1.4 lbs (0.64 kg)






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