| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid level detector for detecting the fuel liquid level of an oil supply tank, provided detachably in an oil fan heater. SOLUTION: A window 4 is provided on the side face of the oil supply tank 3, and a transmission reflector 5 is provided at the inside of the window 4. A light-emitting element 6 and a photodetector 7 are provided in the oil fan heater body 1. Whether the light of the element 6 emitted to the reflector 5 through the window 4 is regressed is detected by the photodetector 7, and the fuel liquid level in the tank 3 is detected. |
