Sensor module and method of manufacturing the same

Abstract

The present invention provides a sensor module and a manufacturing method thereof. The sensor module comprises: a main body, the main body having at least one liquid flow path; a substrate, the substrate is detachably covered on the main body and the substrate seals the liquid flow path, the substrate has a detection unit, at least a part of the detection unit extends into the liquid flow path for detection, and the detection unit has a plurality of reaction electrodes for detecting different substances. The present invention solves the problem of high production cost of composite sensors in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical sensor devices, and in particular to a sensor module and a manufacturing method thereof. Background Art

[0002] The concentration of various substances in human blood affects the realization of various functions in the human body and directly reflects the health level of the human body. The detection of the concentration of various substances provides a basis for patient diagnosis, and many of these substances can be measured by electrochemical sensors, which are characterized by simple operation, accurate results and short time consumption, such as the measurement of the concentration of potassium, sodium, chlorine, calcium, oxygen, carbon dioxide, glucose, creatinine, urea nitrogen and other substances.

[0003] In current electrochemical sensors, each parameter exists independently. When testing multiple parameters, multiple sensor modules need to be assembled together. Each sensor module has a sealing ring, and a liquid path is formed through the sealing ring during assembly. This design is cumbersome for users to operate and is prone to leakage due to assembly errors. For composite sensor modules that can test multiple parameters, multiple sensor modules are integrated together. The production process is complicated, time-consuming, labor-intensive, and has high production costs.

[0004] That is to say, the composite sensor in the prior art has the problem of high production cost. Summary of the invention

[0005] The main purpose of the present invention is to provide a sensor module and a manufacturing method thereof, so as to solve the problem of high production cost of composite sensors in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a sensor module is provided, including: a main body, the main body having at least one liquid flow path; a substrate, the substrate is detachably covered on the main body and the substrate seals the liquid flow path, the substrate has a detection unit, at least a part of the detection unit extends into the liquid flow path for detection, and the detection unit has multiple reaction electrodes to detect different substances.

[0007] Furthermore, the main body includes: a shell having a receiving groove; a connecting plate installed in the receiving groove, the connecting plate having a liquid flow path, and the substrate and the connecting plate are arranged in contact with each other to seal the liquid flow path.

[0008] Furthermore, the shell is made of hard plastic material, and the connecting plate is made of soft plastic material.

[0009] Furthermore, the connecting plate includes a plurality of liquid path connectors, the plurality of liquid path connectors are respectively located at two ends of the liquid flow path, and the liquid path connectors can extend through the bottom of the accommodating groove.

[0010] Furthermore, the shell has a limiting cylinder extending outward, and the liquid path connector passes through the bottom of the accommodating groove and extends into the limiting cylinder.

[0011] Furthermore, the shell has a plurality of legs extending outward, and the plurality of legs are arranged at intervals around the circumference of the shell, and the length of the legs extending out is greater than the length of the limiting tube extending out.

[0012] Furthermore, the groove wall of the receiving groove has a buckle that is buckled with the base plate, and there are multiple buckles, which are arranged at intervals around the circumference of the receiving groove.

[0013] Furthermore, the bottom of the accommodating groove has an avoidance hole, the avoidance hole and the liquid flow path extend in the same direction, and the avoidance hole is spaced apart from the connecting plate.

[0014] Furthermore, the multiple reaction electrodes include at least one reference electrode and at least two experimental electrodes, and the experimental electrodes detect different substances.

[0015] Furthermore, when there are multiple liquid flow paths, one end of each liquid flow path is connected to form an outflow end, and at least one liquid flow path is a reference flow path, and at least another liquid flow path is a test flow path.

[0016] Furthermore, the multiple reaction electrodes include at least one reference electrode and at least two experimental electrodes, the reference electrode extends into the reference flow path, and the experimental electrode extends into the experimental flow path.

[0017] Furthermore, the substrate further includes: a bottom plate; an insulating layer, wherein the insulating layer is arranged on the bottom plate, and at least a part of the detection unit is arranged on the insulating layer.

[0018] Furthermore, the detection unit includes: a reaction electrode, a plurality of reaction electrodes are arranged at intervals in the insulating layer, and the reaction electrodes are in contact with the liquid in the liquid flow path; a wire, a plurality of wires are arranged in a one-to-one correspondence with the reaction electrodes, and one end of each wire is connected to the reaction electrode; a plurality of contacts, a plurality of contacts are arranged in a one-to-one correspondence with the reaction electrodes, and the other end of each wire is connected to the contact.

[0019] Furthermore, the avoidance holes of the main body are arranged corresponding to the contacts so that the contacts are exposed.

[0020] Furthermore, each reaction electrode is plated with a different sensitive film to detect the concentration of different substances in the liquid in the liquid flow path.

[0021] According to another aspect of the present invention, a method for manufacturing a sensor module is provided. The manufacturing method manufactures the above-mentioned sensor module, and the manufacturing method comprises: using a two-color injection molding mold to integrally inject a housing of the sensor module and a connecting plate of the sensor module; using screen printing to print a conductive silver paste on a bottom plate of the sensor module to form a detection unit of the sensor module; treating a reaction electrode of the detection unit with an oxidant to form a silver oxide layer; coating a solid electrolyte layer and a sensitive film on the reaction electrode; and printing an insulating material on the bottom plate to form an insulating layer of the sensor module to form a substrate of the sensor module.

[0022] Applying the technical solution of the present invention, the sensor module includes a main body and a substrate, the main body has at least one liquid flow path; the substrate is detachably covered on the main body, and the substrate seals the liquid flow path, the substrate has a detection unit, at least a part of the detection unit extends into the liquid flow path for detection, and the detection unit has multiple reaction electrodes to detect different substances.

[0023] By setting a liquid flow path on the main body so that blood can flow in the liquid flow path, and the substrate cover is set on the main body to seal the liquid flow path, so that the liquid flow path forms a closed space, preventing the liquid in the liquid flow path from flowing out of the sensor module, and increasing the stability of the liquid flow path. The detection unit detects the content of the substance in the liquid so that the sensor module can realize the measurement function. The setting of multiple reaction electrodes enables the detection unit to detect the content of multiple substances in a liquid at the same time, so that one sensor module can measure the content of multiple substances, which is convenient for the production of the sensor module and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 A schematic diagram showing the overall structure of a sensor module according to an optional embodiment of the present invention; and

[0026] Figure 2 Shows Figure 1 Exploded diagram of

[0027] Figure 3 Shows Figure 2 Exploded view of the central body;

[0028] Figure 4 Shows Figure 2 Schematic diagram of the structure of the middle base plate;

[0029] Figure 5 Shows Figure 4 Exploded diagram.

[0030] The above drawings include the following reference numerals:

[0031] 10. Main body; 11. Liquid flow path; 12. Shell; 121. Receiving groove; 122. Limiting cylinder; 123. Support foot; 124. Buckle; 125. Avoidance hole; 13. Connecting plate; 131. Liquid path connector; 20. Substrate; 21. Reaction electrode; 211. Reference electrode; 212. Experimental electrode; 22. Bottom plate; 23. Insulating layer; 24. Wire; 25. Contact. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0035] In order to solve the problem of high production cost of composite sensors in the prior art, the present invention provides a sensor module and a manufacturing method thereof.

[0036] like Figures 1 to 5 As shown, the sensor module includes a main body 10 and a substrate 20, the main body 10 has at least one liquid flow path 11; the substrate 20 is detachably covered on the main body 10, and the substrate 20 seals the liquid flow path 11, the substrate 20 has a detection unit, at least a part of the detection unit extends into the liquid flow path 11 for detection, and the detection unit has multiple reaction electrodes 21 to detect different substances.

[0037] By setting a liquid flow path 11 on the main body 10, blood can flow in the liquid flow path 11, and the substrate 20 is covered on the main body 10 to seal the liquid flow path 11, so that the liquid flow path 11 forms a closed space, preventing the liquid in the liquid flow path from flowing out of the sensor module, and increasing the stability of the operation of the liquid flow path 11. The detection unit detects the content of the substance in the liquid so that the sensor module can realize the measurement function. The setting of multiple reaction electrodes 21 enables the detection unit to detect the content of multiple substances in a liquid at the same time, so that one sensor module can measure the content of multiple substances, which is convenient for the manufacture of the sensor module and reduces labor costs.

[0038] like Figure 3 As shown, the main body 10 includes a housing 12 and a connecting plate 13, the housing 12 has a receiving groove 121; the connecting plate 13 is installed in the receiving groove 121, the connecting plate 13 has a liquid flow path 11, and the substrate 20 is arranged in close contact with the connecting plate 13 to seal the liquid flow path 11. By dividing the main body 10 into two parts, the substrate 20 can be sealed at the opening of the receiving groove 121, and the liquid flow path 11 is sealed to ensure the airtightness of the liquid flow path 11. The setting of the receiving groove 121 provides a placement space for the connecting plate 13.

[0039] Specifically, the housing 12 is made of a hard plastic material, and the connecting plate 13 is made of a soft plastic material. The housing 12 is made of a hard plastic material so that the housing 12 has a certain hardness and is not easily deformed to ensure that the sensor module can work stably, and can protect the connecting plate 13. The connecting plate 13 is made of a soft plastic material so that the connecting plate 13 has a certain amount of deformation. After the substrate 20 is installed on the housing 12, the connecting plate 13 and the substrate 20 are interference-fitted to ensure the airtightness between the substrate 20 and the liquid flow path 11, avoid leakage of the liquid flow path 11, and increase the stability of the sensor module.

[0040] The housing 12 has the characteristics of impact resistance and mechanical toughness to support the sensor module, and the hard plastic material can be acrylic, polycarbonate, polypropylene, etc. The connecting plate 13 has appropriate softness and can produce a certain amount of deformation to contact the substrate 20 to seal the liquid flow path 11, and the soft plastic material can be polyurethane, rubber, etc.

[0041] like Figure 3As shown, the connecting plate 13 includes a liquid circuit connector 131, and there are multiple liquid circuit connectors 131. The multiple liquid circuit connectors 131 are respectively located at the two ends of the liquid flow path 11, and the liquid circuit connectors 131 can extend through the bottom of the receiving groove 121. The arrangement of the liquid circuit connector 131 enables the liquid flow path 11 to be connected to other devices, so that the liquid enters the liquid flow path 11 through other devices, thereby realizing the measurement function of the sensor module. The function of the liquid circuit connector 131 is to enable the liquid in the liquid flow path 11 to flow, and the liquid flows into the liquid flow path 11 from one liquid circuit connector 131, and flows out from the liquid circuit connector 131 at the other end of the liquid flow path 11, so that the liquid in the liquid flow path 11 can flow out. This arrangement allows fluid to be placed in the liquid flow path 11, or the liquid for test to be replaced.

[0042] like Figure 1 As shown, the housing 12 has a limiting cylinder 122 extending outward, and the liquid path connector 131 passes through the bottom of the receiving groove 121 and extends into the limiting cylinder 122. The setting of the limiting cylinder 122 can limit the liquid path connector 131 to prevent the liquid path connector 131 from shaking, so that the liquid path connector 131 can work stably. Since the liquid path connector 131 is made of soft material and is not easy to dock with other equipment, the setting of the limiting cylinder 122 can play a positioning role, so that the liquid path connector 131 can dock with other equipment and facilitate the installation between the sensor module and other equipment.

[0043] like Figure 1 As shown, the housing 12 has a plurality of legs 123 extending outward, and the legs 123 are arranged at intervals around the circumference of the housing 12, and the length of the legs 123 extending outward is greater than the length of the limiting cylinder 122 extending outward. The arrangement of the legs 123 allows a certain air gap to exist between at least a portion of the housing 12 and the plane to be placed, so as to ensure that the sensor module can be stably connected to other devices. The plurality of legs 123 arranged at intervals around the outer circumference of the housing 12 can stably support the sensor module on the plane.

[0044] like Figure 2 and Figure 3 As shown, the groove wall of the receiving groove 121 has a buckle 124 that is buckled with the substrate 20, and there are multiple buckles 124, and the multiple buckles 124 are arranged at intervals around the circumference of the receiving groove 121. The arrangement of the buckle 124 allows the substrate 20 and the receiving groove 121 to be detachably installed, and the buckle 124 is directly buckled with the top edge of the substrate 20.

[0045] It should be noted that the connecting plate 13 is slightly lower than the buckle 124 to ensure that the substrate 20 and the connecting plate 13 are closely attached to each other after the substrate 20 is installed on the housing 12 .

[0046] like Figures 1 to 3As shown, the bottom of the receiving groove 121 has an avoidance hole 125, the avoidance hole 125 and the liquid flow path 11 extend in the same direction, and the avoidance hole 125 is spaced apart from the connecting plate 13. The avoidance hole 125 and the connecting plate 13 are spaced apart so that the avoidance hole 125 corresponds to the contact 25 on the substrate 20, so that other structures pass through the avoidance hole 125 and cooperate with the contact 25.

[0047] like Figure 4 As shown, the plurality of reaction electrodes 21 include at least one reference electrode 211 and at least two experimental electrodes 212. The experimental electrodes 212 detect different substances. The reference electrode 211 and the experimental electrodes 212 form a reference so that the experimental electrodes 212 can measure accurately.

[0048] like Figure 3 As shown, when there are multiple liquid flow paths 11, one end of each liquid flow path 11 is connected to form an outflow end, and at least one liquid flow path 11 is a reference flow path, and at least another liquid flow path 11 is an experimental flow path. The liquid in the reference flow path is a reference liquid, and the liquid in the experimental flow path is a test liquid.

[0049] Optionally, the test fluid may be blood.

[0050] like Figure 4 As shown, the multiple reaction electrodes 21 include at least one reference electrode 211 and at least two experimental electrodes 212. The reference electrode 211 extends into the reference flow path, and the experimental electrode 212 extends into the experimental flow path. The reference electrode 211 measures the substance of the reference liquid in the reference flow path, and the experimental electrode 212 extends into the experimental flow path to contact the liquid to be tested to measure the liquid to be tested.

[0051] In another specific embodiment shown in the figure, the liquid flow path 11 is one, and the reference electrode 211 and the experimental electrode 212 are both extended into the liquid flow path 11, and the liquid in the liquid flow path 11 is the liquid to be tested. At this time, the liquid measured by the reference electrode 211 comes from the inside of the reference electrode 211, not the liquid to be tested, so that the reference electrode 211 and the experimental electrode 212 form a reference.

[0052] like Figure 4 As shown, the substrate 20 further includes a bottom plate 22 and an insulating layer 23, the insulating layer 23 is disposed on the bottom plate 22, and at least a portion of the detection unit is disposed on the insulating layer 23. The insulating slurry is printed on the bottom plate 22 by screen printing, and the insulating layer 23 can prevent the plurality of reaction electrodes 21 from being mutually conductive due to the aqueous solution contained in the liquid path, thereby increasing the working stability of the reaction electrodes 21.

[0053] It should be noted that the insulating layer 23 can be a separate layer of material, or can be the same material as the bottom plate 22 .

[0054] like Figure 4 and Figure 5 As shown, the detection unit includes a reaction electrode 21, a wire 24 and a contact 25. A plurality of reaction electrodes 21 are arranged in an insulating layer 23 at intervals, and the reaction electrode 21 contacts the liquid in the liquid flow path 11; there are a plurality of wires 24, and the plurality of wires 24 are arranged one-to-one with the reaction electrode 21, and one end of each wire 24 is connected to the reaction electrode 21; there are a plurality of contacts 25, and the plurality of contacts 25 are arranged one-to-one with the reaction electrode 21, and the other end of each wire 24 is connected to the contact 25. The contact 25 plays a role of connecting to an external circuit, and the reaction electrode 21 is connected to the contact 25 through the wire 24, and then the result measured by the reaction electrode 21 is fed back to the external circuit. The contact 25, the wire 24 and the reaction electrode 21 are connected one-to-one, so that one reaction electrode 21 detects one substance and feeds back to the external circuit separately. The reaction electrode 21, the wire 24 and the contact 25 are formed by printing conductive silver paste on the bottom plate 22 by screen printing.

[0055] It should be noted that, in the present application, the contact 25 is located outside the insulating layer 23 , and the reaction electrode 21 is printed on the insulating layer 23 .

[0056] Specifically, the avoidance hole 125 of the main body 10 is arranged corresponding to the contact 25 to expose the contact 25. The arrangement of the avoidance hole 125 provides an avoidance space for the external circuit, so that the external circuit can contact the contact 25 to achieve electrical connection and transmit data to the external circuit.

[0057] Optionally, each reaction electrode 21 is plated with a different sensitive film to detect the concentration of different substances in the liquid in the liquid flow path 11. Different reaction electrodes 21 are plated with different sensitive films, and different sensitive films can penetrate different substances, so that each reaction electrode 21 detects the concentration of different substances.

[0058] It should be noted that the substances that can be detected by the reaction electrode 21 may be potassium, sodium, calcium, chlorine, carbon dioxide, glucose, lactic acid, urea nitrogen, and the like.

[0059] In the present application, the reaction electrode 21 is treated with an oxidant (such as chromic acid solution) to generate a silver chloride layer, and then coated with a solid electrolyte layer and a sensitive membrane to form an electrochemical sensor. The sensitive membrane is a reference, potassium, sodium, calcium, chloride and pH ion selective permeable membrane.

[0060] A method for manufacturing a sensor module, the manufacturing method manufacturing the above-mentioned sensor module, the manufacturing method comprising: using a two-color injection molding mold to integrally inject and mold a housing 12 of the sensor module and a connecting plate 13 of the sensor module; using screen printing to print a conductive silver paste on a bottom plate 22 of the sensor module to form a detection unit of the sensor module; treating a reaction electrode 21 of the detection unit with an oxidant to form a silver oxide layer; coating the reaction electrode 21 with a solid electrolyte layer and a sensitive film; and printing an insulating material on the bottom plate 22 to form an insulating layer 23 of the sensor module to form a substrate 20 of the sensor module.

[0061] The main body 10 is formed by injection molding two different plastics together through a two-color injection mold, so that the shell 12 and the connecting plate 13 are integrally formed and not easily separated, and it is convenient to manufacture the shell 12 and the connecting plate 13. The solid electrolyte is coated on the reaction electrode 21, and there is no need to fill the reaction electrode 21 with liquid, which reduces the size of the reaction electrode 21 and facilitates the integration of the reaction electrode 21 on the bottom plate 22.

[0062] Compared with the existing electrochemical sensors, the present invention integrates multiple different electrochemical sensors on the bottom plate 22 to form a substrate 20. During assembly, the sensor module is manufactured by only pressing the substrate 20 and the main body 10 together. At the same time, the main body 10 is made by injection molding hard plastic and soft plastic through a two-color injection mold. The main body 10 has the characteristics of both plastics, which can support and protect the sensor module and form a sealed liquid path with the substrate 20. The use of this process to produce sensor modules saves time and effort and reduces costs.

[0063] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sensor module, It is characterized in that include: A main body (10), wherein the main body (10) has at least one liquid flow path (11); a substrate (20), the substrate (20) being detachably covered on the main body (10), and the substrate (20) sealing the liquid flow path (11), the substrate (20) having a detection unit, at least a portion of the detection unit extending into the liquid flow path (11) for detection, the detection unit having a plurality of reaction electrodes (21) for detecting different substances; The main body (10) comprises: A housing (12), wherein the housing (12) has a receiving groove (121); a connecting plate (13), the connecting plate (13) being installed in the containing groove (121), the connecting plate (13) having the liquid flow path (11), the substrate (20) being arranged in close contact with the connecting plate (13) to seal the liquid flow path (11); The substrate (20) comprises: Bottom plate (22); An insulating layer (23), wherein the insulating layer (23) is arranged on the bottom plate (22), and at least a portion of the detection unit is arranged on the insulating layer (23).

2. The sensor module according to claim 1, It is characterized in that The housing (12) is made of a hard plastic material, and the connecting plate (13) is made of a soft plastic material.

3. The sensor module according to claim 1, It is characterized in that The connecting plate (13) comprises a liquid path connector (131), wherein the liquid path connector (131) is in plurality and the plurality of liquid path connectors (131) are respectively located at two ends of the liquid flow path (11), and the liquid path connectors (131) are capable of extending through the bottom of the containing groove (121).

4. The sensor module according to claim 3, It is characterized in that The housing (12) has a limiting cylinder (122) extending outward, and the liquid path connector (131) passes through the bottom of the containing groove (121) and extends into the limiting cylinder (122).

5. The sensor module according to claim 4, It is characterized in that The housing (12) has a support foot (123) extending outwards, the support foot (123) being multiple, the multiple support feet (123) being arranged at intervals around the circumference of the housing (12), and the extended length of the support foot (123) being greater than the extended length of the limiting cylinder (122).

6. The sensor module according to claim 1, It is characterized in that The groove wall of the receiving groove (121) has a buckle (124) that is buckled with the base plate (20), and there are a plurality of buckles (124), which are arranged at intervals around the circumference of the receiving groove (121).

7. The sensor module according to claim 1, It is characterized in that The bottom of the containing groove (121) has an avoidance hole (125), the avoidance hole (125) and the liquid flow path (11) extend in the same direction, and the avoidance hole (125) and the connecting plate (13) are arranged at a distance.

8. The sensor module according to any one of claims 1 to 7, It is characterized in that The plurality of reaction electrodes (21) include at least one reference electrode (211) and at least two experimental electrodes (212), and the experimental electrodes (212) detect different substances.

9. The sensor module according to any one of claims 1 to 6, It is characterized in that When there are a plurality of liquid flow paths (11), one end of each of the liquid flow paths (11) is connected to form an outflow end, and at least one of the liquid flow paths (11) is a reference flow path, and at least another of the liquid flow paths (11) is a test flow path.

10. The sensor module according to claim 9, It is characterized in that The plurality of reaction electrodes (21) include at least one reference electrode (211) and at least two experimental electrodes (212); the reference electrode (211) extends into the reference flow path, and the experimental electrode (212) extends into the experimental flow path.

11. The sensor module according to claim 10, It is characterized in that The detection unit comprises: The reaction electrodes (21), a plurality of the reaction electrodes (21) are arranged at intervals in the insulating layer (23), and the reaction electrodes (21) are in contact with the liquid in the liquid flow path (11); A wire (24), wherein there are a plurality of wires (24), the plurality of wires (24) are arranged in one-to-one correspondence with the reaction electrodes (21), and one end of each wire (24) is connected to the reaction electrode (21); A contact point (25), wherein there are a plurality of the contact points (25), the plurality of the contact points (25) are arranged in a one-to-one correspondence with the reaction electrodes (21), and the other end of each of the wires (24) is connected to the contact point (25).

12. The sensor module according to claim 11, It is characterized in that The groove bottom of the containing groove (121) has an avoidance hole (125), the avoidance hole (125) and the liquid flow path (11) extend in the same direction, and the avoidance hole (125) and the connecting plate (13) are arranged at intervals, and the avoidance hole (125) and the contact (25) are arranged correspondingly, so that the contact (25) is exposed.

13. The sensor module according to any one of claims 1 to 7, It is characterized in that Each of the reaction electrodes (21) is plated with a different sensitive film to detect the concentration of different substances in the liquid in the liquid flow path (11).

14. A method for manufacturing a sensor module, It is characterized in that The manufacturing method is applied to manufacture the sensor module according to any one of claims 1 to 13, wherein the manufacturing method comprises: Injection-molding the housing (12) of the sensor module and the connecting plate (13) of the sensor module as one piece using a two-color injection molding mold; Printing conductive silver paste on the bottom plate (22) of the sensor module by screen printing to form a detection unit of the sensor module; The reaction electrode (21) of the detection unit is treated with an oxidant to form a silver oxide layer; Coating a solid electrolyte layer and a sensitive membrane on the reaction electrode (21); An insulating material is printed on the bottom plate (22) to form an insulating layer (23) of the sensor module, so as to form a substrate (20) of the sensor module.

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