CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended MA913B/3 Combined Epoxy pH electrode MA913B/3 Price on request MA812/2 Conductivity/TDS probe with 2meter cable(MC 310). Price on request MA991B/1 Combined glass pH electrode MA991B/1 Price on request