pH Sensor InPro4260i/SG/225 Back Catalog number: 52005382 Availability: In the manufacturer's stock Price on request - + Recommended SE600 Combination probe SE600 Price on request MA811/2 Conductivity/TDS probe with 2meter cable (MC410). Price on request 6210129 CSKC50M Reagecon 50,000 µS/cm Conductivity Standard, 500ml Price on request