pH Sensor InPro4260i/SG/225 Back Catalog number: 52005382 Availability: In the manufacturer's stock Price on request - + Recommended MA811/2 Conductivity/TDS probe with 2meter cable (MC410). Price on request HI1043B Refillable Double Junction pH Electrode Price on request PC-5000-1177 1/4" ID Peristaltic Pump Santoprene Tubing (TPE55S Price on request