... flap liquid level meters,LUGB/LUCB vortex street flow transmitter,LDG electromagnetic flowmeters,LWGY/LWY turbine flowmeters, ... installation,equip with adjustable flow valve.Light structure,good figure,easy installation and maintenance,alarm switch is optional,widely ... /h5~50m3/hStructure Drawing: rotameter with alarm,air flow rotameter,glass tube variable area flow meters,flow meters for liquid