Fluid properties sensor

Abstract

This improves the productivity of fluid property sensors while easily aligning the communication holes between the outer and inner electrodes. [Solution] The fluid property sensor 100 comprises a case 14, an outer electrode 52, an inner electrode 62, a support portion 40 to which the inner electrode 62 is attached by screw coupling, and a plate 76 fixed to the case 14 and to which the support portion 40 is attached by screw 93. The outer electrode 52 and the inner electrode 62 each have a first communication hole 53 and a second communication hole 63 that penetrate radially, and the fluid to be detected is guided between the outer electrode 52 and the inner electrode 62 through the first communication hole 53 and the second communication hole 63. One of the support portion 40 and the fixing portion has an adjustment hole 73 through which a screw 93 is inserted to adjust the relative position of the support portion 40 and the inner electrode 62 in the circumferential direction of the inner electrode 62.

Claims

1. A fluid properties sensor for detecting the properties of a target fluid, The case and A cylindrical outer electrode attached to the aforementioned case, An inner electrode provided inside the outer electrode, The inner electrode is attached by screw coupling, and an insulating support portion is provided to insulate the outer electrode from the inner electrode and support the inner electrode within the case, A fixing part which is fixed to the case and to which the support part is attached by a fixing member, The case includes a detection unit which detects the properties of the fluid to be detected based on the electrical characteristics between the outer electrode and the inner electrode, The outer electrode and the inner electrode are each formed with a first and second communication hole that penetrates radially, and the fluid to be detected is guided between the outer electrode and the inner electrode through the first and second communication holes. A fluid property sensor characterized in that one of the support portion and the fixing portion has an adjustment hole through which the fixing member is inserted and for adjusting the relative position of the support portion and the inner electrode in the circumferential direction of the inner electrode.

2. A fluid property sensor according to claim 1, The fluid properties sensor is characterized in that the adjustment holes consist of a plurality of holes formed at intervals in the circumferential direction.

3. A fluid property sensor according to claim 1, The first communication hole and the second communication hole are formed at equal intervals and at the same predetermined angle to each other in the circumferential direction. The fluid properties sensor is characterized in that the adjustment holes are each formed within the predetermined angular range.

4. A fluid property sensor according to claim 2, A fluid property sensor characterized in that the first and second communication holes are formed such that, when the relative positions of the outer electrode and the inner electrode are adjusted within the angular range between adjacent holes in the circumferential direction, at least a portion of one of the first and second communication holes overlaps the other in the radial direction of the inner electrode.

5. A fluid property sensor according to claim 1, The fluid properties sensor is characterized in that the adjustment hole is an elongated hole formed extending in the circumferential direction.

6. A fluid property sensor according to claim 1, The support portion has the adjustment hole, The fixing portion has a protruding portion formed integrally with it as a fixing member. A fluid property sensor characterized in that the protruding portion is fitted into the adjustment hole.

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