US Patent No. 10,772,210

SOLUTION PROPERTY SENSOR


Patent No. 10,772,210
Issue Date September 08, 2020
Title Solution Property Sensor
Inventorship Che-hsin Lin, Kaohsiung (TW)
Wei-hsing Yen, Kaohsiung (TW)
Wei-sin Kao, Kaohsiung (TW)
Assignee National Sun Yat-sen University, Kaohsiung (TW)

Claim of US Patent No. 10,772,210

1. A solution property sensor, comprising:a substrate having a front surface and a back surface, wherein the substrate defines a temperature sensing region, an electrical conductivity sensing region, a pH value sensing region, and an electrical signal output region, wherein the substrate includes:
a plurality of conductive patterns disposed on the front surface or the back surface of the substrate, wherein the conductive patterns are electrically isolated with each other and include two temperature conductive wires, at least two electrical conductivity conductive wires, a pH value conductive wire, and a reference electrode conductive wire, wherein the conductive patterns further comprises a pH value conductive pattern electrically connected to the pH value conductive wire and disposed on the front surface or the back surface of the substrate; and
a plurality of electrical connection pins disposed on the electrical signal output region and electrically connected to the conductive patterns, respectively;
a temperature sensing element disposed on the temperature sensing region and electrically connected to the two temperature conductive wires;
an electrical conductivity sensing element disposed on the electrical conductivity sensing region and electrically connected to the at least two electrical conductivity conductive wires;
a pH value sensing element disposed on the pH value sensing region and electrically connected to the pH value conductive wire, wherein a material of the pH value sensing element includes indium tin oxide, and the pH value sensing element has a sensing surface formed of indium tin oxide and configured to sense a pH value of a solution, wherein the pH value sensing element is a rectangular plate member, wherein the pH value sensing element is electrically connected to the pH value conductive pattern, wherein a width of the pH value conductive pattern is substantially a width of the rectangular plate member, and a length of the pH value conductive pattern is 10% to 50% of a length of the rectangular plate; and
a reference electrode disposed on the substrate and electrically connected to the reference electrode conductive wire.