This device depends upon the nearly linear relationship between salinity (saltiness) and electrolytic conductivity of aqueous solutions. It is essentially a temperature compensated resistance meter utilizing a small Thermistor and a zonal or split tip measurer.
In use the device, cleaned under running water, would go into the device and give a direct saltiness reading, e.g. milli-equivalents/liter or more practical teaspoons per pint. It would send any electrolyte present for low salt diets and would to a lesser extent or on a separate scale send acidity (sourness).
The device could be powered by watch cells and read on a compact meter, an LCD scale ( ) or on a simple graph display of 3—10 elements. The device has not been prototyped and should have tests done to establish scales.
The same technology can apply to saliva testing, urine testing, etc. testing, etc. The closely related device derived from the popular optical “fire alarm” would test wine or other beverage clarity.