superOhm

SuperOhm is a brand of high‑range electrical resistance measurement devices developed by X Corporation. The product line includes hand‑held multimeters and laboratory instruments that can accurately quantify resistances up to one million ohms and beyond. Standard commercial measurement tools typically limit their precision to a few hundred thousand ohms, so SuperOhm instruments are sought for applications that involve very high resistivity materials, such as ceramic sensors, high‑temperature insulators, and specialized semiconductor devices.

The SuperOhm series employs a dual‑mode measurement technique that combines a traditional ohmmeter circuit with a high‑impedance voltage detection scheme. By applying a low current bias and measuring the resulting voltage drop with a nanoampere‑sensitive amplifier, the instruments achieve resolution down to a few ohms even at the upper end of their range. Calibration is performed against National Institute of Standards and Technology (NIST) traceable resistors, and the devices undergo periodic self‑diagnostics to maintain measurement integrity.

In research settings, SuperOhm products are used for characterizing dielectric breakdown in high‑voltage transformers, monitoring corrosion resistance in marine structures, and evaluating the quality of printed circuit board (PCB) trace layers with very low conductance. Educational institutions also adopt the devices in advanced electronics courses to demonstrate the challenges of measuring high resistances accurately. The technology is considered a reliable solution for professionals requiring extended dynamic range and high precision in resistance measurement.