Overview

Enviro Forest’s High Precision Contact Resistance Micro Ohmmeter 300A with Data Logging is designed for accurate testing of circuit breakers, busbars, disconnect switches, fuses, and other high-current connections. This device delivers test currents up to 300 A and ensures highly accurate measurements with a resolution as low as 0.0001 µΩ. It features a true DC ripple-free output for stable readings, fast measurement time, and reliable long-term operation. Its portability and user-friendly interface make it ideal for field applications, allowing professionals to monitor contact resistance with precision while also logging data for analysis.

Features

High precision low-resistance measurement
True DC ripple-free test current up to 300 A
Ultra-fine resolution of 0.0001 µΩ
Fast and reliable measurement time
Built-in data logging for trend analysis
Portable and suitable for field use
Easy-to-operate digital display

Technical Specifications

Output Current	50 A, 100 A, up to 300 A
Test Range	0 mΩ to 80 mΩ
Resolution	0.0001 µΩ
Accuracy	± 0.2%
Open Circuit Voltage	DC 10 V
Measuring Time	1 min
Operating Mode	Continuous measurement
Operating Temperature	14 °F to 122 °F (-10 °C to 50 °C)
Relative Humidity	≤85% RH
Dimensions	14.17 in x 9.25 in x 10.63 in (360 mm x 235 mm x 270 mm)
Weight	18.7 lb (8.5 kg)