DMO200 Digital Micro-Ohmmeter Returns

After a period of limited availability, the DMO200 Digital Micro-Ohmmeter from T&R Test Equipment Ltd is officially back in production and available to order.

Trusted by engineers across the power, rail, aerospace, and utilities industries, the DMO200 has built a strong reputation for delivering fast, accurate, and reliable low resistance measurements in demanding field environments.

However, this production run is limited to just 50 units. Once these units have been allocated, customers may face another wait before additional stock becomes available.

Why Low Resistance Testing Matters

Accurate low resistance testing is essential for verifying the integrity of electrical connections. Even a small increase in contact resistance can lead to excessive heat generation, energy losses, equipment failure, and costly downtime.

A high-quality digital micro-ohmmeter enables maintenance engineers to identify deteriorating joints before they become critical failures.

Typical applications include:

• Busbar joints
• Circuit breaker contacts
• Welded connections
• Protective bonding
• Earth continuity testing
• Switchgear maintenance
• High-current electrical connections

Whether performing routine preventative maintenance or commissioning new installations, precise resistance measurements help improve safety, reliability, and system performance.

Why Engineers Choose the DMO200 Digital Micro-Ohmmeter

The DMO200 combines laboratory-grade accuracy with the portability required for field testing.

Wide Current Output Range

The instrument provides 1–200A DC test current, including 100A continuous operation with less than 2.5% ripple. This allows engineers to select the most appropriate test current for a wide variety of applications while maintaining highly stable measurements.

Exceptional Measurement Resolution

With a resolution of 0.1μΩ, the DMO200 can detect extremely small changes in resistance, making it ideal for identifying developing faults before they become serious issues.

Built for Efficient Field Testing

The colour back-lit LCD simultaneously displays:

• Test current
• Measured voltage
• Resistance value

This clear presentation allows engineers to confirm measurements instantly without switching between screens.

Faster Repeat Testing

Three programmable test current presets reduce setup time when carrying out repetitive testing across multiple assets, improving efficiency during planned maintenance.

Simple Data Management

Results can be stored directly to USB and exported as CSV files, making documentation straightforward and simplifying the creation of maintenance reports.

Ready for Global Use

Thanks to its universal 90–264V AC power supply, the DMO200 can be used virtually anywhere in the world without requiring additional power conversion equipment.

Lightweight Yet Rugged

Weighing only 6.9kg, the DMO200 is considerably easier to transport than many comparable high-current micro-ohmmeters.

Its rugged portable case makes it well suited for site work, substations, rail infrastructure, manufacturing facilities, and industrial maintenance environments.

Key Features at a Glance

• 1–200A DC output current
• 100A continuous operation
• Less than 2.5% ripple
• 0.1μΩ measurement resolution
• USB data storage with CSV export
• Colour back-lit LCD display
• Simultaneous display of current, voltage and resistance
• Three programmable test current settings
• Universal 90–264V AC input
• Lightweight 6.9kg portable design
• BS EN 61010 compliant
• CE marked

Applications Across Multiple Industries

The DMO200 is widely used in sectors where reliable electrical connections are critical.

Power Generation and Transmission

Engineers use the DMO200 to verify the condition of:

• Busbar joints
• Circuit breakers
• Disconnectors
• Transformer connections
• Earthing systems

Rail Infrastructure

Rail maintenance teams rely on accurate low resistance measurements when inspecting:

• Bonding connections
• Return current paths
• Trackside electrical equipment
• Switchgear

Aerospace

Aircraft manufacturing and maintenance demand highly accurate bonding measurements to ensure electrical continuity and compliance with safety standards.

Utilities and Industrial Maintenance

From substations to manufacturing plants, the DMO200 supports preventative maintenance programmes by identifying deteriorating electrical connections before failures occur.

Limited Availability

Following its return to production, only 50 DMO200 Digital Micro-Ohmmeters are available in the current manufacturing run.

For organisations planning maintenance programmes, equipment upgrades, or new commissioning projects, early ordering is recommended to avoid disappointment.

Where to Buy the DMO200

The DMO200 Digital Micro-Ohmmeter is available throughout the United Kingdom from our trusted distribution partners:  Acutest, Micro Precision Ltd., Cuthbertson Laird, Norwich Instrument Services, and PASS Ltd.

Customers outside Great Britain can purchase the DMO200 through T&R Test Equipment’s worldwide network of authorised distributors, ensuring access to local sales and support wherever they are based.

The Return of a Proven Low Resistance Tester

The return of the DMO200 is welcome news for maintenance engineers looking for a dependable, portable, and highly accurate digital micro-ohmmeter.

Combining high current output, exceptional measurement resolution, efficient data management, and robust field performance, the DMO200 continues to be a trusted solution for professionals responsible for maintaining critical electrical infrastructure.

With demand expected to be high and availability limited, now is an ideal time to secure one of the 50 units available in this production run.