Greenlee® TrueRMS Digital Multimeter

Uncompromised Accuracy From a Simple Multimeter

We Guarantee to Have the Best Price

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-DM-300DM-300 Digital Multimeter
(Inlcudes: Sure Grip Test Leads, 9V battery, carry case)
1.45 lbs (.45 kg)
Part #DescriptionWeightPrice
GL-TSG-3Replacement Sure Grip Test Leads0.32 lb (0.15 kg)
GL-TC-20Replacement Carry Case0.45 lb (0.20 kg)
  • 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)






we will beat a competitor's quote by 5%

Did you know that we can give you a quote for most of our products, including shipping?

You can also call us toll free 866.222.0030

Questions & Answers

Do you have any questions about this product?
Let our experts and customers resolve all your doubts

What can make this page better?

We do everything we can think of to provide you with the product specs, images and ordering info you need, but if we're missing something or still have room to improve, please let us know. Your comments, suggestions and questions are the best tools we have for serving you better!