CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended 18901209 84μS/cm 250mL Conductivity Solution, one bottle 500,00 Kč 18901172 D201A-C Combination pH probe 450,00 Kč MA915B/2 pH glass electrode for with 2meter cable. Price on request