Ph monitoring device
AssigneeKoninklijke Philips Electronics N.V.
InventorsJun Shi, Weiran Wang
Life of this patent
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Abstract
The invention proposes a pH monitoring device 10 comprising a chamber 107 for containing a solution; a polymer 105 being immersed in the solution, wherein the physical state of the polymer is changeable in dependence on whether the pH of the solution exceeds a threshold value; and a detector 109 for detecting the change of the physical state of the polymer.
Claims15
A pH monitoring device comprising:
- a chamber for containing a solution;
- a polymer being immersed in the solution, wherein the dimension of the polymer is changeable in dependence on whether the pH of the solution exceeds a threshold value;
- a detector for detecting the change of the dimension of the polymer.
(canceled)
A system for cleaning food, the system comprising:
- a device for processing water;
- a device for cleaning food using the alkaline water.
A method of monitoring the pH of a solution, comprising the steps of:
- immersing a polymer in the solution, wherein the dimension of the polymer is changeable in dependence on whether the pH of the solution exceeds a threshold value;
- detecting the change of the dimension of the polymer by a detector.
(canceled)
The method according to 8, wherein the polymer is positioned in the chamber such that the flow of the solution is blocked when the polymer is swollen, or the polymer is positioned in the chamber such that the flow of the solution is blocked by the polymer and the flow of the solution can be detected when the polymer is dissolved;
- said step of detecting the change of the dimension comprising a step of detecting the flow rate of the solution.
Dependencies are inferred from the claim text.