The solid-state transducer is the sensing element at the heart of the ANB Sensors Calibration-Free pH Sensor. It doesn’t need routine manual calibration, but does need occasional light maintenance. After about 75,000 measurements, a light abrasion of the transducer surface with the included sanding pad is all that’s needed to keep it performing accurately. The sensor tracks this automatically and alerts you when service is due.

When the transducer eventually reaches the end of its service life, it’s user-replaceable. The pH sensor includes the tools needed to remove and install the transducer. This replacement transducer is available in two versions, one for each depth rating, so make sure to select the one that matches your sensor.