Adopting Volumetric rotary piston principle of measurement, Class C and D grade FEATURES:1. Volumetric meter, on principle of piston rotation, complies with ISO 4064 Class C or Class D standard2. High sensitivity, accurate measurement even at low flow rate of 4L/h.3. Optimum accuracy and performance at all times, in any position4. Piston adopts high quality material to ensure stable and durable ...