CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended MA812/2 Conductivity/TDS probe with 2meter cable(MC 310). Price on request MI56P pH/Temp probe for pH55 and pH56 Price on request SE510 Conductivity/TDS probe with 1meter cable SE510 Price on request