1/4" ID Peristaltic Pump Santoprene Tubing (TPE55S Back Catalog number: PC-5000-1177 Availability: In the manufacturer's stock Price on request - + Recommended 52002987 pH Sensor InPro4260/120/PT1000 Price on request MA921B/1 Double junction orp platinum electrode MA921B/1 Price on request MA812/2 Conductivity/TDS probe with 2meter cable(MC 310). Price on request