Marmonix MEG825 Earth Resistance Tester with Bluetooth

The Marmonix MEG825 clamp-on ground tester measures earth resistance from 0.00 Ω to 20 kΩ by the clamp, 2-, 3- and 4-wire and selective methods, plus soil resistivity, earth current up to 20 A and earth voltage up to 600 V. It uses FFT with automatic frequency control (128/111/105/94 Hz), a 65 × 32 mm clamp, a 2.5-inch colour LCD, Bluetooth for an Android app and storage for 500 results. Browse all Marmonix earth resistance testers, or compare the MEG925 double clamp tester.

2/3/4Wires Combined Clamp on Ground Tester Marmonix MEG825

The MEG825 Series 2/3/4Wires Combined Clamp-On Ground Tester is a state-of-the-art instrument specifically designed for on-site measurement of earth resistance, soil resistivity, earth current, and earth voltage. Incorporating advanced digital processing technology, this tester supports multiple measurement methods, including 2-wire, 3-wire, 4-wire, and selection methods, making it versatile for various applications.

With Fast Fourier Transform (FFT) and Automatic Frequency Control (AFC) technologies, the MEG825 boasts excellent anti-interference capabilities, environmental adaptability, and high test consistency. These features ensure exceptional precision, stability, and reliability for long-term use. Its large-caliber current clamp design allows users to measure the grounding resistance of large-sized ground down leads, single-point grounding systems, grid grounding systems, and complex grounding structures without disconnecting parallel connections, significantly improving measurement convenience.

The MEG825 is equipped with a 2.5-inch colorful LCD display, providing clear data visualization. It features a storage capacity for 500 test results, complete with date and time stamps, and offers clock functionality. Its Bluetooth communication function enables seamless testing and data retrieval via Android mobile devices after installing the dedicated app, delivering a modern and user-friendly experience. Additionally, the USB interface allows data upload to a PC, where communication software facilitates reading, saving, reporting, and printing historical records.

This versatile tester includes a host machine, test wires, auxiliary ground rods, data software, and communication cables, making it a comprehensive solution for grounding performance testing. It is widely used across industries such as power, telecommunications, meteorology, oil fields, construction, lightning protection, and industrial electrical equipment, offering a perfect blend of functionality, convenience, and precision.

Marmonix MEG825 Series Technical Specifications

Base and Working Conditions

General Specifications

Earth Resistance Measurement

Buying guide: Read our earth resistance tester buyer’s guide.

Questions about the MEG825 clamp-on ground tester

What is the difference between the MEG825 and MEG825-B?

The MEG825-B extends two ranges: the table on this page lists 0.00 Ω–200 kΩ earth resistance and earth current up to 45 A, against 0.00 Ω–20 kΩ and 20 A for the MEG825. Both read soil resistivity up to 9999 kΩm and earth voltage up to 600.0 V, and both have Bluetooth.

How long does an MEG825 earth resistance test take?

The MEG825 takes about 15 seconds per earth resistance test and makes about 2 earth current or voltage readings per second, according to the general specifications on this page. The kit includes 20 m red and black and 10 m yellow and green test wires plus four Φ9 × 230 mm auxiliary grounding rods for 1–100 m electrode spacing.

MEG825 or MEG925: which should I choose?

Choose the MEG825 when you want Bluetooth with an Android app, a 2.5-inch colour LCD and a rechargeable 2600 mAh battery, and the MEG925 when you need the double-clamp method, 2000-set memory and AC current up to 600 A. On marmonix.co the MEG825 stores 500 results and reads earth current up to 20 A.