Convenient use and safety

The utility model provides a convenient use and safety, belongs to flow measurement technical field. This flowmeter includes soap pipe, soap pipe support system, soap -film photoelectric sensor system, liquid level control system, liquid level fluctuation system, overflowing liquid collecting system, the soap lye pump system of inhaling, soap lye storage system and the moist system of soap pipe. Adopt electromagnetic force and spring force combined action to the push -and -pull rod that links to each other with the weight, through the push -and -pull rod make the weight dip with emersion liquid, cause the fluctuation of the intraductal liquid sexual periodicity of soap. The intraductal liquid level of soap is at the decline in -process because the malleation effect of air inlet forms thin soap -film, and soap -film loops through the photoelectric sensor system at the in -process that rises, according to the time difference carry on the flow calculate with the weight control of rising and falling. This flowmet