SKU: MT987

20A Micro-Ohmmeter

$2,995.00 ex. GST
$3,294.50 inc. GST

  • Built-in 14.6V 12 000mAh rechargeable Iron Phosphate battery
  • 4-Wire test method
  • 108mm x 65mm true colour touch screen
  • Maximum resolution 0.1µ Ω
  • Temperature Measurement: 10°C to +60°C
  • Discharge Probes: LCD has a built-in reminder
  • Printer function
  • Data storage of 800 sets
  • USB interface for linking to computer
  • Bluetooth function allows connection to Android mobile phones

The MT987 is a 20A Micro-Ohmmeter, also known as transformer DC resistance tester, DC resistance quick tester, earth continuity tester. It uses microprocessor technology for testing safely, precisely and reliably. It is mainly used to measure the resistance of transformer windings, earth conductor continuity test, wire  resistance of cables, switches, connectors, contact resistance of relays, coils, motors, and equipment casings, lightning protection belts, earth connection resistance test between metal components of beams, structures, cabinets, steel bars, water pipes, windows, guardrails, radiators and assembly lines. Widely used in telecommunications, electricity, meteorology, computer rooms, oil fields, power distribution lines, tower transmission lines, gas stations, factory earthing grids and lightning rods. The MT987 is composed of monitoring software, test line and communication line. The meter has rechargeable batteries, full-colour large-screen LCD display, touch screen operation, port overload prevention function. Large capacity storage of 800 sets of data. Stored data can be transferred to a PC using an optical USB and software supplied and has the functions of reading, comparing and saving historical data. The Bluetooth function can connect with the Android App. There is a built-in printer where test results can be immediately printed for reference.


SKU: MT987 Category:


Function Range Resolution Accuracy
Measuring Current 20A 10.0uΩ-1000.00uΩ




±0.2%FS ± 10dgt
Measuring Current 10A 10.00mΩ-100.00mΩ 0.01mΩ ±0.2%FS ± 10dgt
Measuring Current 5A 100.0mΩ-1000.0mΩ 0.1mΩ ±0.2%FS ± 10dgt
Measuring Current 1A 1.000Ω-10.000Ω 0.001Ω ±0.2%FS ± 10dgt
Measuring Current 0.1A 10.00Ω-100.00Ω 0.01Ω ±0.2%FS ± 10dgt
Measuring Current 10mA 100.0Ω-1000.0Ω 0.1Ω ±0.2%FS ± 10dgt
Measuring Current 1mA 1.000KΩ-10.000KΩ 10.00KΩ-100.00KΩ





±1%FS ± 30dgt
Temperature (Internal) -10.0°C to 60.0°C 0.2°C ±1.0°C
Temperature (Probe) -10.0°C to 60.0°C 0.2°C ±1.0°C
Test Current 20A, 10A, 5A, 1A, 0.1A, 10mA, 1mA
Short Circuit Current 20A
Temperature Check Yes, external temperature probe, internal temperature sensor, dual sensor design
Temperature Conversion Yes, temperature conversion, can convert 75°C measurement results
Overload Protection Yes
Automatic Discharge Yes
Power Supply DC14.6V (12000mAh Large capacity lithium battery)
Charging Function Yes
Display 5-inch touch screen (854 pixels x 480 pixels) full-colour LCD display
Interactive Mode Touch screen / button
LCD Size 108 mm x 65mm
Meter Size 277.2mm x 227.5mm x 153mm
Test Lead Length 5 meters, 1 red and 1 black
Mobile APP Bluetooth connection to Android Devices
Computer PC USB cable connection
Data Storage 800 Group
Data Review Data lookup function
Printer There is a printer embedded in the instrument panel, press the print button to print the test results..
Battery Voltage The battery power is displayed in real time, prompting that the battery needs to be charged in time when the voltage is low.
Automatic Shutdown Optional off, 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes
Power Consumption Standby: about 4W (30% brightness) Measurement: 100W Max Meter: 3.1kg (including battery)
Weight Meter: 3.1kg (including battery) Test leads: 850g
Working Temp and Humidity -10°C to 40°C 70% RH
Storage Temp and Humidity -20°C to 60°C 70% RH
Insulation Resistance More than 10MΩ (500V between the circuit and the shell)
Pressure Resistance AC 3700V/rms (between the circuit and the case)
Electromagnetic Properties IEC61010-4-3, radio frequency electromagnetic field ≤1V/m
Safety Regulations IEC61010-1, CAT III 600V, pollution degree 2, JJG724-1991 “Verification Regulations for DC Digital Ohmmeter”, JJG166 1993 “Verification Regulations for DC Resistors”, “DL/T967- 2005 Loop Resistance Tester and DC Resistance Fast Tester Verification Regulations”.

Safety Rating


  • Test Leads
  • Temperature Probe
  • USB Cable
  • Charger
  • Carrying Case
  • Carrying Straps