We are offering 2 tube rotameter.Flowmeter (rotameter) consist of housing and a set of calibration glass tube with bobbin float. Calibration tube can be provided in a combinations of (o2+n2o) or customers requirement. The flows control is obtained by needle valves which can be easily distinguished from one another by touch & colour. Easy to read large size scales with fluorescent illumination allow inside bobbins to be accurately read. Description:the gas flowmeter consists of two flowmeter tubes assembled together to work in parallel from two separate sources of gas supply and discharge through a single outlet. Control valve: at inlet on the base of the front side of the instrument. Inlet connection: at back, 716 inch unf and 12 inch unf (for o2 & n2o respectively), threaded male end. Outlet connection: female nipple end at top right side of the frame.