Moisture Sensor Using Transistor Switching for Wound Dressings

The patent changes the measurement parameter from electrical conductivity to transistor switching state. Instead of measuring the continuous conductivity value of the liquid, the system uses the binary switching state (on/off) of transistors that are activated when liquid bridges electrode pairs. This parameter change makes the measurement independent of the liquid's specific conductivity properties, thereby improving both measurement accuracy and adaptability across different exudate types.

The patent replaces the direct electrical conductivity measurement system with a transistor switching system. The liquid's role changes from being the measurement medium itself to being the trigger that activates discrete transistor switches. This substitution transforms the continuous analog measurement into a discrete digital-like signal, eliminating the dependency on liquid conductivity variations.

The patent introduces transistors as intermediary elements between the electrodes and the measurement system. The transistors act as mediators that convert the variable conductivity signal into a standardized switching signal. The liquid still connects the electrodes, but the transistor intermediary ensures that the output signal is reliable and consistent regardless of the liquid's conductivity variations.

The patent segments the continuous conductivity measurement into discrete transistor switching events. Instead of measuring a continuous range of conductivity values, the system divides the detection into separate, independent transistor switches, each responding to liquid presence between specific electrode pairs. This segmentation creates reliable discrete signals that are easier to interpret and less susceptible to variability.