测试探头以及液体检测装置

Abstract

本实用新型提供一种测试探头以及液体检测装置，测试探头包括：探头外壳；电连接部，其位于探头外壳的一端，与外部电源相连接；及检测部，其设置于探头外壳的另一端，检测部包括：第一测试电极，其用于测量液体中的目标物浓度，第一测试电极包括：第一测试电极外壳、测试膜头、以及第一测试电极主体，其至少一部分收纳于探头外壳内，测试膜头通过第一测试电极外壳可拆卸地连接于第一测试电极主体，该测试膜头暴露于探头外壳的外部；及PH电极，其包括第二测试电极和参比电极，该参比电极能够选择性地与第一测试电极和第二测试电极中的一者构成回路。基于本实用新型，能降低成本，高效更换膜头，尺寸小，能够选择性地设为内嵌式或者外挂式的方式。

Claims

1. A test probe, characterized by, include: Probe housing; An electrical connection part, located at one end of the probe housing, is used to connect to an external power source; as well as The detection unit is located at the other end of the probe housing. The detection unit includes: A first test electrode, used to measure the concentration of a target substance in a liquid, includes: a first test electrode housing, a test membrane head disposed within the first test electrode housing, and a first test electrode body. At least a portion of the first test electrode body is housed within the probe housing. The test membrane head is detachably connected to the first test electrode body via the first test electrode housing, and the test membrane head is exposed outside the probe housing. The pH electrode includes a second test electrode and a reference electrode, the reference electrode being able to selectively form a circuit with one of the first test electrode and the second test electrode.

2. The test probe according to claim 1, characterized in that, The first test electrode housing has openings at both ends. A thread is provided at one end of the housing of the first test electrode, so that it can be detachably connected to the body of the first test electrode. The test membrane head is exposed at the end of the first test electrode housing opposite to the thread.

3. The test probe according to claim 2, characterized in that, The test membrane head includes: The test membrane, which covers the opening of the unthreaded end of the housing of the first test electrode, constitutes an ion-selective electrode; A solid contact layer, which is in direct or indirect contact with the test membrane, is used to convert ions into electrons; and A conductive substrate, which is electrically connected to the solid contact layer, and is in the form of a sheet or a block.

4. The test probe according to claim 3, characterized in that, The first test electrode also includes a conductive device and a circuit board, and the conductive substrate is electrically connected to the circuit board via the conductive device. The circuit board is electrically connected to the electrical connection portion via wiring.

5. The test probe according to claim 4, characterized in that, The conductive device is fixed to the circuit board by welding. The conductive device is located between the conductive substrate and the circuit board in a compressed state.

6. The test probe according to claim 5, characterized in that, The conductive device is any one of a spring pin, a spring, or a spring sheet.

7. The test probe according to claim 1, characterized in that, An end plate is provided at the other end of the probe housing, and the end plate has holes for mounting the first test electrode and the pH electrode, respectively. The first test electrode and the pH electrode are threaded into the respective holes for installation.

8. The test probe according to any one of claims 1 to 7, characterized in that The detection unit further includes a temperature sensor; and / or, the first test electrode is an ammonia nitrogen electrode or a nitrate nitrogen electrode.

9. The test probe according to any one of claims 1 to 7, characterized in that, The test probe also includes a sleeve and a filter screen. The sleeve is fitted over the probe housing, and the filter screen is disposed around the detection section.

10. A liquid detection device for water environment monitoring, characterized in that, Includes: a housing for a liquid detection device, and a test probe as described in any one of claims 1 to 9. The test probe is located inside or outside the housing of the liquid detection device.

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