CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended 52002987 pH Sensor InPro4260/120/PT1000 Price on request MA811/2 Conductivity/TDS probe with 2meter cable (MC410). Price on request MA840 Polarographic DO probe with 3m cable Price on request