pH Sensor InPro4260i/SG/225 Back Catalog number: 52005382 Availability: In the manufacturer's stock Price on request - + Recommended PC-5000-1177 1/4" ID Peristaltic Pump Santoprene Tubing (TPE55S Price on request SE510 Conductivity/TDS probe with 1meter cable SE510 Price on request SE520 Conductivity/TDS probe with 1meter cable SE520 Price on request