Measuring instruments Prostat PRF-922B Miniature 2-Point Probe Point-to-Point Surface up to 10¹² Ω 60-200-0606 Eurostat Prostat PRF-922B miniature 2-point probe: accurate point-to-point surface resistance measurement on small areas, up to 10¹² Ω. Compatible with PRS-801 tera-ohm meter. Prostat.