CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended MA918B/1 Comb glass pH electrode 3 dia, DJ,refill, BNC, 1m Price on request MI59P EC/TDS/Temp probe for EC59 and EC60 Price on request MA840 Polarographic DO probe with 3m cable Price on request