| 摘要 |
<p>PROBLEM TO BE SOLVED: To increase the accuracy of the measurement of a flow rate in a thermosensitive flowmeter in which the low flow rate of a fluid such as a gas or the like is measured by using a flow sensor which is provided with heating elements on the upstream side and the downstream side. SOLUTION: In a flowmeter, a flexible hose 10 and a flexible hose 11 are installed so as to be hung down from a flowmeter body, a horizontal tube 13 is installed so as to be connected between the lower end of the hose 10 and that of the hose 11, and a flow sensor 15 which comprises a heating element 19 and a heating element 20 in the upstream position and the downstream position in the direction A of a flow passage is attached to the center in the length direction on the upper side of the inner circumference of the horozontal tube 13. Then, a plumb hob 30 as a horizontal-state holding means is attached to the outer circumference of the horizontal tube 13 directly under the flow sensor 15. When the horizontal tube 13 is tilted in such a way that the flow sensor 15 is not situated in the horizontal position, the horizontal tube 13 is moved by the weight of the plumb hob 30 so as to correct its inclination, and the flow sensor 15 is held always in the horizontal position.</p> |
