Repeatable, highly-accurate surface resistivity readings for ESD mats, floors, and coatings. The Static Solutions CP-1111 Ohm-Stat™ Concentric Ring Probe is a precision test fixture designed for use with ESD resistivity meters to measure surface resistivity on planar materials. When paired with high-performance meters like the Ohm-Stat™ RT-1000 or RT-500, the CP-1111 provides consistent contact geometry for more dependable, repeatable measurements than improvised leads or quick checks. Facilities use concentric ring probes like the CP-1111 to support ongoing ESD program verification and to confirm that ESD-control materials like worksurfaces, packaging, finishes, and flooring continue performing as intended over time. It is a must-have tool for teams that need accurate results for audits, troubleshooting, and trend tracking. CP-1111 Concentric Ring Probe Key Advantages: Repeatable Contact Geometry – Two concentric rings provide consistent surface contact for accurate, comparable readings over time. Weighted for Consistency – Five-pound probe helps maintain steady pressure during testing to reduce operator variation. Made for High-Performance Meters – Designed to work with the Ohm-Stat™ RT-1000, RT-500, and other high-quality resistivity meters. Conductive Rubber Contact Surface – Conductive rubber (Shore A 50 to 60) supports reliable electrical contact across planar materials. Supports Standardized Test Methods – Used to test according to ESD S11.11 and ESD S11.12 for surface resistivity verification. Program and Audit Friendly – Helps support ESD control program verification activities aligned with ESD S.20.20 expectations. Product Details Weight: 5.6 lbs Shipping Dimensions: 3 × 3 × 5 in Contact Material: Conductive rubber, Shore A 50 to 60 Body/Coating: Coated with insulative paint What's Included CP-1111 Ohm-Stat™ Concentric Ring Probe (1) One-year limited warranty