| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive gas flow sensor with a simple configuration for controlling septic tank.SOLUTION: The gas flow sensor includes a case 10 installed midway in an air supply passage to the septic tank to allow the air to flow in from an air inlet 14a and flow out through an air outlet 14b, a rotating impeller 11 whose rotating shaft 11a is disposed in a direction perpendicular to that of the air supply passage from the air inlet 14a to the air outlet 14b and is located out of the section of the air supply passage from the air inlet 14a to the air outlet 14b, a rotating impeller chamber 15 housing the rotating impeller 11 in the case 10, and an encoder 12 for detecting the number of rotations of the rotating shaft 11a. |
