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Amprobe MO-100 Milliohm Meter

by Amprobe
1 customer review

List Price: $699.95
Price: $590.06 & FREE Shipping. Details
You Save: $109.89 (16%)
Only 1 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • Enter your model number above to make sure this fits.
  • Accurate four terminal measurement down to 100µ ohms does not require test leads resistance compensation
  • Ranges from 200.0m ohms to 2000 ohms with minimum resolution of 100µ Ohm
  • O-Ring sealed enclosure
  • Indicates measurement errors due to temperature or connection problems
  • Battery powered ,IEC / EN 61010-1 ,Test leads, Instruction manual, Shoulder belt, 1.5V(AA) x 8 Batteries
  • Digital milliohm meter measures resistance up to 2,000 ohms
  • Four input terminals for taking four-wire resistance measurements, which are more accurate than two-wire resistance measurements
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$590.06 & FREE Shipping. Details Only 1 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

Technical Details

  • Brand Name: Amprobe
  • Part Number: 3474954
  • UPC: 095969499194

Product Description

The Amprobe MO-100 digital milliohm meter measures resistance up to 2,000 ohms in automotive, industrial, and heating, ventilation, and air-conditioning (HVAC) applications. It has four input terminals for taking four-wire resistance measurements, which are more accurate than two-wire resistance measurements. It has a minimum resolution of 100 microohms for measuring small amounts of resistance. The meter offers a choice of three test currents for more precise readings. Over-temperature and over-voltage warnings help prevent damage to the meter. The meter comes with four test leads with alligator clips that provide hands-free connection to conductors up to 0.67" (17 mm) in diameter. The test leads have a shrouded plug that helps protect against shock if the leads are accidentally pulled out of the meter during use. The meter's hold function keeps a reading on the display, even after meter is disconnected. The meter has a liquid crystal display (LCD) with a 2,000-count resolution, meaning that it can display up to 1,999 units (3-1/2 digits) before the operating range needs to be changed. It is a manual-ranging meter and requires the operator to choose the appropriate operating range for the property being measured. The MO-100 milliohm meter conforms to International Electrotechnical Commission (IEC) safety standard 61010, European Conformity (CE) directives, and Australian N10140 guidelines. The meter operates on eight AA batteries (included). Auto power-off feature turns off the unit after 30 seconds of non-use to conserve battery life. It comes with a shoulder strap for hands-free carrying.


Maximum resistance detected 2,000 ohms
Test current supplied at 2,000 ohm range 1 milliamp
Test current supplied at 200 and 20 ohm ranges 10 milliamp
Test current supplied at 2,000 milliohm and 200 milliohm ranges 100 milliamp
Minimum resolution 100 microohms
Fuse 0.5 amp/ 250V fast-blow ceramic fuse (one, installed; one, spare)
Power supply 1.5V AA batteries (eight, included)
Weight 3.3 lb./1.542 kg
Dimensions 9.8 x 7.5 x 4.3 inches/110 x 250 x 190 mm (H x W x D)

H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Ohmmeters measure resistance in an electrical component or circuit and check the continuity of an electrical circuit. Micro- or milliohm meters measure small values of resistance, and megohmmeters (also known as megaohmmeters or meggers) measure large values of resistance. Ohmmeters have an internal power supply, such as a battery or a capacitor, that supplies current to a circuit or component that is turned off. Test leads are connected in series to the meter and circuit or device under test, and as current flows through the circuit or device, the meter calculates the difference in voltage between the leads and measures the resistance. Ohmmeters measure resistance using either the two-wire or four-wire method. The two-wire method is easier to set up than the four-wire method, but it provides less accurate measurements because it includes not only the resistance of the circuit or device under test but also the resistance of the test leads. The four-wire method measures only the resistance of the circuit or device under test, providing more accurate readings and allowing the meter to measure smaller values of resistance than the two-wire method.

Amprobe manufactures electrical testing equipment for commercial, industrial, and home use. The company was founded in 1948 and is headquartered in Everett, WA.

What’s in the Box?

  • MO-100 milliohm meter
  • (4) Test leads (one red, one green, one blue, one black)
  • (8) 1.5V AA batteries (installed)
  • (2) 0.5 amp/ 250V fast-blow ceramic fuse (one installed, one spare)
  • (1) Shoulder belt
  • Instructions

Product Information

Technical Details
Part Number 3474954
Item Weight3 pounds
Product Dimensions9.8 x 7.8 x 5.9 inches
Item model numberMO-100
Batteries:1 Nonstandard Battery batteries required. (included)
Item Package Quantity1
Temperature Range-40/1000 °C
Number of Handles1
Display StyleLiquid Crystal Display (LCD)
Batteries Included?Yes
Batteries Required?Yes
Average Battery Life4 hours
Technical Specification
Additional Information
Best Sellers Rank #345,758 in Home Improvement (See top 100)
Shipping Weight4.3 pounds (View shipping rates and policies)
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableApril 12, 2011
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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Verified Purchase
This meter is perfect for testing the windings in our 125 HP motors for correct resistance and checking our soldered cables. We are quite pleased.
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Amprobe MO-100 Milliohm Meter
This item: Amprobe MO-100 Milliohm Meter
Price: $590.06
Ships from and sold by Amazon.com

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