Rotary piston flowmeter is a volume flowmeter which is used to measure liquid flow. When it equips with LPJ-12 photoelectric pulse converter, it can complete with XSF-03 or XSJ-391 flow totalizer. It is not only can do remote distance totalizing, but also can output 0～10mA or 4～20mA standard current signal. It can be used with other indicating, recording instrument or regulator.

The flowmeter is simple structure, high stability, wide range and high accuracy. It can be used to measure non-corrosive medium such as heavy oil and other petroleum products.