pH Meter Based in Suspended Gate Field Effect Transistors to Application in Monitoring of Water Quality

The protocol to monitor the water pH variation during a long time using a full electronic pH-meter consisting of a SGFET (Suspended Gate Field Effect Transistor) is presented after the analysis of the transconductance and the drain current drifts under pH. The main advantages of using this device are its high sensitivity and the ability to integrate it with the electronic treatment into a miniaturized system.