| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a low-cost temperature switch wherein no insulating process is performed even with such application as detecting temperature of terminal stage of a high-voltage power-receiving facility, etc., while water-proof treatment is easy. SOLUTION: A switch main body 3 incorporating a light projecting element and a photo-detecting element and a detection part 4 provided at a temperature- detection object 2 are connected with an optical fiber 5, and the light from the light projecting element is projecting from a light-projection surface of the detection part 4. Meanwhile, at a temperature switch wherein the light photo-detected at a photo-detection surface of the detection part 4 is given to the photo-detecting element, a light-shielding means 6 for shielding the light onto the photo-detection surface through change temperature is provided for optical detection of temperature.</p> |
