CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Back Catalog number: 6210129 Availability: In the manufacturer's stock Price on request - + Recommended MA831R Stainless steel temperature probe Price on request 52002987 pH Sensor InPro4260/120/PT1000 Price on request MA9305 Pack of 100 x 1.4V batteries. Price on request