Extech UM200 High-Resolution Micro-Ohm Meter
The Extech UM200 is a precision micro-ohmmeter designed for accurate low-resistance measurements down to 1 µΩ. With six main ranges (each with three sub-ranges), a built-in comparator, data memory, and PC interface, it’s suited for field and lab testing of coils, joints, connectors, and other critical low-resistance elements.
Description
The Extech UM200 is a high-performance micro-ohm meter engineered for professionals who require precise measurement of very low resistance values in electrical systems, components, and assemblies. Its measurement ranges span from a few micro-ohms up through kilo-ohms—with six selectable ranges and triple sub-ranges in each—enabling optimal resolution and accuracy for different test scenarios. The unit achieves resolution as fine as 1 µΩ, making it capable of detecting minute differences in contacts, winding resistance, and other critical connections.
To support testing of both resistive and inductive components, the meter offers auto or manual ranging modes, a 5-digit backlit LCD for clear readouts, and a built-in comparator for setting upper/lower threshold limits for pass/fail judgments. Users can store up to 3,000 measurements internally, and there is a PC interface for data logging and further analysis. The meter is capable of applying test currents up to 10 A for the lowest resistance ranges. It’s supplied with 4-wire Kelvin clip test cables, a rechargeable Li-Polymer battery, AC adapter/charger, USB/PC software, and a soft carrying case for portability.
Whether in field service, manufacturing quality control, or laboratory environments, the UM200 offers a flexible and accurate solution for validating low-resistance parameters in critical systems.
Features
- Ultra-Fine Resolution — Down to 1 µΩ in its lowest range
- Six Ranges with Sub-Ranges — Each current range has three sub-ranges to match test conditions
- High Test Current (Up to 10 A) — Enables measurement in lowest resistance ranges
- Comparator Function — HI/LO threshold testing with audible alert for pass/fail decisions
- Large Backlit 5-Digit Display — For clear readouts even in dim environments
- Auto & Manual Ranging — Flexibility depending on test requirements
- Data Storage / Recall — Stores up to 3,000 measurement records for later review
- PC Interface / Data Logging — Enables export and analysis of results on a computer
- 4-Wire Kelvin Test Method — Minimizes lead and contact resistance effects
- Complete Accessory Package — Includes Kelvin clip leads, AC charger, USB cable, battery, and carrying case
Includes
- With 4-wire cables with Kelvin clip connectors
- Rechargeable Li-Polymer battery
- AC adapter/charger
- Software
- USB cable
- Soft carrying case
