CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended 18901196 PH10.01 250mL 10.01pH, one bottle 12,74 € 18901218 3.0 mol KCl 250mL, 3.0mol KCl pH/ORP electrode so 12,74 € 18901199 PH4.00 500mL 4.00pH, one bottle 19,90 €