1 A milliohmmeter

  • Up to 1 A test current
  • Resolution 0.01 mΩ
  • Resistance reading: up to 2 kΩ
  • Alphanumerical display
  • Direct reading (Up to 4½ digits)
  • Rechargeable battery
  • 0.2 % ± 2 digits basic accuracy
  • Kelvin-type (4-wires) measurement
  • Built-in printer (optional)
  • Serial data output (RS232)


The MO2Ke digital low resistance ohmmeter is a portable, microprocessor-controlled instrument used to accurately measure resistances of contacts, switches, transformers and motor windings, etc., using test currents from 1 mA up to 1 A.

It uses the Kelvin-type (4-terminals) measurement principle, thus eliminating errors caused by lead and contact resistances.

Resistance readings are shown in the alphanumeric display with up to a 4½ digit-resolution. It allows to measure resistances of up to 2 kΩ, with resolution of 0.01 mΩ.

Measurements accuracy is guaranteed by the state-of-the-art system for signal-amplification, offset-free and with long-term stability.

The equipment has a serial output (RS232) that allows to collect measured values in a serial printer, notebook or any data logger in order to register the tests performed.

The HOLD function keeps in the display the value measured at a certain time-point.

Test current may be adjusted by the operator in every one of the ranges and their values are displayed in analog form (bargraph), making it easy to measure resistances with a significant inductive component. The open circuit output voltage is up to 10 V, depending on the selected test current, reducing the stabilization time for the test current when highly inductive elements (specially transformers windings) are measured. The measurement circuit has an effective protection against voltage peaks originated by those inductances.

The equipment is housed in a rugged plastic case with a hinged lid and carrying handle. It is a portable, strong, impact resistant and lightweight equipment, suitable to be used in outdoors and under severe weather conditions. It supplies very reliable and accurate measurements both in laboratory and out in the field.

Technical specifications

Test currents

1 mA, 10 mA, 100 mA, 1 A.
Each current may be continuously adjustable from 0 to 100 %.

Resistance ranges

0-2 Ω @ 1 A.
0-20 Ω @ 100 mA.
0-200 Ω @ 10 mA.
0-2000 Ω @ 1 mA.


0.01 mΩ @ 1 A.

Output voltage

Up to 10 VDC (open circuit) @ 1 A.

Measurement principle

4-terminal, Kelvin-type.

Basic accuracy

± 0.2 % of reading ± 2 digits.

Advanced features

Digital direct reading of low resistances in the alphanumerical display, with up to 4½ digits. Very fast and accurate measurements.

Serial data output

RS232 @ 4800 bps.

Environmental protection

IP65 (with closed lid).

Safety class

Meets the requirements of IEC 61010-1.

Power supply

Internal rechargeable 12 V - 3000 mAh battery or mains.

Built-in battery charger

For 100 - 240 V~ mains supply.

Operating temperature range

23 °F to 122 °F (-5 °C to 50 °C).

Storage temperature range

-13 °F to 158 °F (-25 °C to 70 °C).

Humidity range

95 % RH (non condensing).

Equipment weight

Approx. 6.6 lb (3 kg).


10.16" x 8.07" x 4.72" (258 x 205 x 120 mm).

Customer service
Phone: +1 305 938 0389
Fax: +1 786 401 7165

Phone: +1 305 938 0389