What is the difference between the PRF-914B Miniature Concentric Ring and the PRF-922B Two-Point Probe?
The PRF-914B and the PRF-922B are two different measurements. Two-Point electrodes measure few effective paths in parallel between them, while a concentric ring measures many paths in parallel, as a result the measurements are different. The PRF-914B will measure in excess of E14 ohms while the PRF-922B will measure up to E12 ohms, two orders of magnitude less.
