The first commercially available glass membrane pH sensors were launched to the marketplace in the mid-1930s. The sensors of today still rely on the same design principles as these first products.
A Basic pH Measurement System Consists of:
This series of articles will explore the millivolt output signal as well as each physical component of the pH sensor measurement chain. Understanding the design of the sensor is a basis for learning why pH sensors have different features based on the application they are used in.