CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended MI56P pH/Temp probe for pH55 and pH56 Price on request MA811/2 Conductivity/TDS probe with 2meter cable (MC410). Price on request 1127-1L Chemsolute pH buffer with colour coding (20 °C), pH 7.00, green, 1L Price on request