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REED MS2301 Clamp-on Ground Resistance Tester

Model: MS2301

REED MS2301 Clamp-on Ground Resistance Tester-

Downloads: datasheet manual
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Enables non-contact measurements of ground conductors without the need for auxiliary ground spikes.

Sorry! This product has been discontinued.

The REED MS2301 Clamp-on Ground Resistance Tester has been discontinued, it has been replaced by the REED R5700 Clamp Ground Resistance Tester

REED MS2301 Offers

This autoranging earth resistance clamp meter measures ground resistance and leakage current. The MS2301 has internal memory capable of storing up to 99 measurements and features a double molded conductor clamp for added protection. Includes resistance calibration loop for quick on-site verification.


  • Autoranging ground resistance and leakage current measurements
  • 0.001Ω resolution for low resistance measurements
  • Basic accuracy of ± 0.01Ω
  • Internal memory stores up to 99 readings
  • User adjustable alarm threshold
  • Display hold function
  • Durable double molded conductor clamp
  • 1.2" (30mm) jaw size for large ground rods
  • Low battery indicator and auto shut off
  • Cat. III 600V safety rating

Key Features

  • Accuracy of ± 0.01Ω
  • User selectable alarm threshold from 1 to 100Ω
  • Limit alarm
  • Measures leakage current to 1mA and neutral current to 20A
  • 1 second sampling time
  • 3-3/4 digit, 2000-count LCD with display Hold
  • Autoranging
  • Doubly insulated conductor clamp for extra security
  • Large jaws open to 1.8 x 1.3"/45 x 32mm
  • Includes hard carrying case and batteries


Resistance Range: 1, 10, 100, 200, 400, 600, 1200Ω
Resolution: 0.001, 0.01, 0.1, 1, 5, 10, 20Ω
Accuracy: ±1.5%, ±1.5%, ±2.0%, ±3.0%, ±6.0%, ±10%, ±20%
Current Range: 100, 300mA, 1, 3, 10, 20A
Resolution: 0.01, 0.03mA, 0.001, 0.003, 0.01, 0.03A
Accuracy: ±2.5%
Test Voltage: 3700V max.
Power Supply: 6 x NiMh 1.2V "AAA" batteries
Dimensions: 2.1 x 4.1 x 10.9" (54 x 104 x 276mm)
Weight: 37 oz (1050 g)

REED MS2301 Specifications

Ground Resistance
Range 0.01 to 0.999Ω, 1 to 9.99Ω, 10 to 99.9Ω, 100 to 199.9Ω, 200 to 400Ω, 400 to 600Ω, 600 to 1200Ω
Accuracy 0.01 to 0.999Ω: ±(1.5% +0.01Ω)
1 to 9.99Ω: ±(1.5% +0.1Ω)
10 to 99.9Ω: ±(2.0% +0.3Ω)
100 to 199.9Ω: ±(3.0% +1Ω)
200 to 400Ω: ±(6.0% +5Ω)
400 to 600Ω: ±(10% +10Ω)
600 to 1200Ω: ±(20% +20Ω)
Resolution 0.001Ω, 0.01Ω, 0.1Ω, 1Ω, 5Ω, 10Ω, 20Ω
Range 100mA, 300mA, 1A, 3A, 10A, 20A
Accuracy 100mA: ±(2.5% +1mA)
300mA: ±(2.5% +2mA)
1A: ±(2.5% +0.003A)
3A: ±(2.5% +0.01A)
10A: ±(2.5% +0.03A)
20A: ±(2.5% +0.05A)
Resolution 0.1mA, 0.3mA, 0.001A, 0.003A, 0.01A, 0.03A
General Specifications
Range Selection Autoranging
Sampling Time 1 sec.
Display 9,999 count LCD display
User Selectable Alarm Yes (High and Low)
Display Hold Yes
Internal Memory Up to 99 datapoints
Autoshut off Yes (after 5 mins, off)
Power Supply 9V Battery
Battery Life Approx. 10 hours of continuous use (Alkaline)
Low Battery Indicator Yes
Jaw Opening 1.2" (30mm)
Overvoltage Category CAT. II 600V
Product Certifications CE
Operating Temperature 14 to 122°F (-10 to 50°C)
Storage Temperature -4 to 140°F (-20 to 60°C)
Dimensions 10.9 x 4.1 x 2.1" (276 x 104 x 54 mm)
Weight 2.1lbs (1050g)

What's included with the REED MS2301

  • Ground Resistance Tester
  • 3 Resistance Calibration Loops (1Ω, 5Ω and 10Ω)
  • Batteries
  • Cleaning Cloth
  • Wrist Strap
  • Hard Carrying Case

Ideal Applications for the REED MS2301

Ground resistance of lightning arrestors, electrical distribution equipment, telecommunication systems and gas station installation.

Calibration Lab
When you purchase a REED product it comes included with a one year warranty. We back our products.