The MTR105 is a dedicated rotating machine tester that brings Megger’s proven insulation resistance (IR) expertise together with advanced low resistance, capacitance, inductance, and rotation testing in one handheld instrument. It delivers a holistic view of motor health, enabling you to assess windings, connections, and overall condition with precision and confidence. Designed for production, service, and maintenance teams, the MTR105 supports fast, reliable decisions across your asset lifecycle.

Comprehensive testing capabilities

Built on a unified test architecture, the MTR105 consolidates multiple core measurements:

Insulation resistance with PI, DAR, timed tests, and temperature compensation for consistent, comparable results.
DLRO four‑wire Kelvin low resistance testing for accurate measurement of joints, connections, and windings.
Inductance and capacitance to characterise coils and diagnose imbalance or deterioration.
Motor direction of rotation and three‑phase supply rotation to verify correct installation before energisation.
This integrated approach reduces set‑up time, cuts the number of tools you carry, and streamlines workflows in the field or workshop.

Accuracy you can trust

Stable test voltages and four‑wire measurement techniques underpin consistent, repeatable readings. Temperature measurement and compensation keep IR results aligned to reference conditions, so trends are meaningful across seasons and sites. Clear, full‑colour graphics present values and trends at a glance, allowing you to validate pass/fail criteria and move decisively to the next task.

Safety engineered into every test

The MTR105 is designed to protect both operator and instrument. Fast live‑voltage detection inhibits tests if hazardous voltage is present, reducing the risk of damage when connected to energised circuits or across phases. User‑selectable test terminal lockout thresholds add another layer of control, while robust internal protection supports safe use in CAT III 600 V environments.

Robust by design, ready for the field

A tough, over‑moulded housing and IP54 environmental protection defend against dust, moisture, and daily knocks. Detachable, interchangeable leads adapt to different applications and maintain reliable connections. With onboard storage for up to 256 motors and simple USB download, you can capture, share, and analyse results as part of a connected maintenance ecosystem.

Confident, efficient decision‑making

By unifying essential motor tests in a single instrument, the MTR105 helps you shorten diagnostics, standardise procedures, and improve asset reliability. Whether you are commissioning new equipment, verifying repairs, or conducting routine maintenance, the MTR105 provides the clarity, safety, and durability you need to work with confidence.

Video presetnation on Youtube of MEGGER MTR105

Standard accessories

Description Part number

MTR105 Rotating Machine Tester 1010-361

Included accessories:

Hook strap assembly

Soft pouch

Temperature probe, T type CAT III 600 V

IR lead set (comprising of):

3 x Grabber Clips (Red, Black and Blue)

CAT III 1000 V, CAT IV 600 V

3 x 4 mm Test leads, 2 m, 1 end Right Angle

1 end straight (red, black and blue)

CAT III 1000 V, CAT IV 600 V

3 x Test probes (red, black and blue), long reach (100 mm),

CAT III 1000 V, CAT IV 600 V

Kelvin clip lead set CAT III 600 V (comprising of):

2 x Kelvin Clip leads, 2 meters, 4 mm Right Angled Connectors

(4), Single (2-core) cable.

MTR105 calibration certificate 1012-173

USB memory stick

6 x AA alkaline batteries (fitted)

Recommended options

Description Part number

Optional accessories:

Mains charger kit (includes rechargeable batteries) 1007-464

Hook strap assembly 1012-068

Soft pouch 1012-063

Kelvin probe lead set CAT III 600 V 1011-929

Kelvin probe pins (pack of 4) 1012-064

Kelvin clip lead set CAT III 600 V 1011-928

Grabber clip lead set CAT III 1000 V, CAT IV 600 V 1012-069

Test probe set, long reach CAT IV 600 V 1012-066

Test probe set, long reach, CAT II 1000 V 1012-065

Temperature probe, T type CAT III 600 V 1012-067

MTR105 UKAS calibration certificate 1012-172

SP5 remote probe accessory 1007-157

More products MEGGER

MEGGER TM1800 CIRCUIT BREAKER ANALYZER CG-19290 CG-19292 CG-19294 CG-19296

• Modular based design - user configurable TM1800 from nine different modules
• Built in PC with CABA Local software - advanced testing with predefined breaker test plans (templates), onsite measurement view and analysis
• Dual ground testing using DCM module - increased safety with both sides of breaker grounded
• Fast and easy testing - Select-Connect-Inspect workflow and high level user interface
• Graphical results for quick interpretation - timing and motion measurements, coil currents
• USB and Ethernet communication interface - for quick back up, LAN connection and printer options
• CABA Win - for advanced data analysis, database interface and common test data archive

POCKET SIZED INSULATION AND CONTINUITY TESTERS MEGGER - MIT200 SERIES

• Insulation testing to 1000 MO
• Continuity testing at 200 mA down to 0.01 O
• Live circuit warning (voltage display) and test inhibit
• Digital/Analogue display

MEGGER MIT1015 10KV INSULATION RESISTANCE MEGOHMMETER

• RE>Act mode enhanced accuracy and safety
• PI predictor function (PIp)
• Measures up to 20 TΩ
• Up to 3 mA noise rejection

MEGGER SMRT36 THREE PHASE RELAY TESTER

• Small, rugged, lightweight and powerful
• Operate with or without a computer
• Intuitive manual operation with Smart Touch View Interface
• High current, high power (60 Amps/300 VA rms) per phase
• Network interface provides IEC 61850 test capabilities
• Fully automated testing using AVTS Software

HIGHLY PORTABLE MICRO-OHMMETER WITH DUALGROUND SAFETY MEGGER - DLRO100E, DLRO100X AND DLRO100H

• CAT IV 600 V for safe operation
• Light, 100 A, battery powered unit for portability
• High noise immunity for stable readings
• Smooth DC output for circuit breaker testing

MEGGER - B10E

• Reliable and stable a.c. and d.c. power supply for circuit breaker testing
• Continuously variable 24-250 V AC or DC output
• Separate outputs for close coil, trip coil and spring charging motor voltage
• Direct triggering for minimum trip voltage testing

MEGGER SVERKER 650 PROGRAMMA SINGLE PHASE RELAY TESTER

• Designed for rugged field use
• 0 to 100 Amp output current
• Suitable for testing many different types of relays such as power, voltage and current
• Easy to operate

COMBINED LOOP AND RCD TESTERS MEGGER - LRCD210 AND LRCD220

• Non-trip loop tester
• RCD testing from 10 mA to 1000 mA
• Extremely easy and safe to use
• Built-in protective front cover

MEGGER IDAX-300 IDAX-350 INSULATION DIAGNOSTIC ANALYZER, TAN DELTA, POWER FACTOR

• Automated measurement and analysis of moisture content, tan delta/power factor and oil conductivity
• Individual temperature correction (ITC) of tan delta/power factor and oil conductivity
• 40% faster measurements with the new IDAX 5.0 SW
• Reliable measurements in high-interference environments
• Multi-function test set for transformer measurements

MEGGER TTR300 TTR310 TTR330 THREE-PHASE TRANSFORMER TURNS RATIO METER

• Stand-alone or remote-control operation
• Accurately measures ratio, phase deviation and excitation current
• Field upgradeable without compromise to calibration
• Built-in capability for storing and downloading test results in an XML format, via RS-232, Ethernet or USB ports (depending on model)
• Works in the presence of high interference/high voltage
• Highest ratio measurement (45,000:1); highest accuracy (0.1%)
• Displays % error vs. name plate with pass/fail limits