Fluid sensor device

By designing a fluid sensor device, and using the alignment of the light source with both sides of the storage tank and LED array lighting, the problems of uneven fluid distribution and uneven lighting in the fluid sensor system are solved. This enables accurate measurement and easy replacement, is suitable for multiple fluid flow paths, and avoids contamination.

CN111103239BActive Publication Date: 2026-07-24MEDTRONIC INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MEDTRONIC INC
Filing Date
2017-09-01
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing fluid sensor systems cannot provide uniform distribution of fluid on both sides of the sensor surface and uniform illumination, making it difficult to achieve accurate measurements. Furthermore, sensor replacement and cleaning are inconvenient, and they are not suitable for multi-fluid flow paths and cannot avoid contamination.

Method used

A fluid sensor device is designed, comprising a fluid inlet and outlet, a receiving tank, a light source and a camera or photodetector. The light source is aligned with both sides of the receiving tank, and a uniform illumination is provided using an LED array. A sensor card is fixed by a receiving tank cover lock. The sensor card has pH and ammonia sensing membranes, and a processor is used to determine the fluid characteristics.

Benefits of technology

It achieves uniform distribution of fluid on both sides of the sensor surface and uniform illumination, improves measurement accuracy, simplifies sensor replacement and cleaning processes, is suitable for multiple fluid paths, ensures consistency of results and avoids contamination.

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Abstract

The present invention relates to a fluid sensor device for determining and / or monitoring the pH and / or solute concentration of a fluid and an associated sensor card. The fluid sensor device can be used in any application where detection of a fluid component or solute concentration is required, and in exemplary embodiments the fluid sensor device is used to detect ammonia concentration and / or pH in dialysis fluid. The fluid sensor device has a camera, a light source positioned opposite the camera, and a receiving slot for positioning a removable sensor card between the camera and the light source such that both sides of the sensor card are exposed to a sampled fluid.
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