CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended MA916B/3 Combined glass pH electrode, refill, BNC, 3m Price on request MA921B/2 Double junction ORP platinum electrode MA921B/2 Price on request SE520 Conductivity/TDS probe with 1meter cable SE520 Price on request