Kofloc Model RK1650 Flowmeter

This is a completely renewed model of existing KOFLOC RK1600R with sophisticated design to fit sophisticated laboratory or plant equipment.


An area flow meter has a float in a conical cylinde (tapered tube) with a larger end in the upper section and a smaller end in the lower section. The float moves up and down according to the intensity of the flow, and the position at which the float balances indicates the flow rate. Not only simple flow meters that merely measure the flow rate but also flow meters with a valve for flow control, flow meters with a load pressure fluctuation type flow controller, flow meters with a supply pressure fluctuation type flow controller, and flow meters with an alarm switch are available.




The natural environment is preserved through the balance of solids, liquids and gases that exist on the earth. However, human civilization has caused pollution that has greatly damaged our environment. The task of the present generation is to restore our environment to its natural healthy state. And this is also the greatest challenge for 21st century science and technology.

KOFLOC's corporate motto is "A Scientific Approach for Fluids." In other words, we create products that scientifically measure and control the balance of liquids and gases. We trust that through our work we are making a contribution to the regeneration of the environment and to the establishment of a prosperous society.


  • Compact. A compact flowmeter with variations of total length of 84 mm, 104 mm, 124 mm and 154 mm for choice according to the user’s needs
  • Low pressure loss. Pressure loss minimized to allow applications for low supply pressure
  • Choice of needle valve to suit the user’s needs. Four types of needle valve available for your choice according to the requirement of supply pressure
  • Superior stability. All tubes are precision-formed to provide the float with outstanding repeatability and stability.
  • Economical. A flowmeter at quite affordable price achieved through our all-out effort at streamlined design


  • For environmental instrumentation systems
  • For general instruments for analysis
  • For purge systems
  • For semiconductor manufacturing equipment


FluidsAir, N2, O2, H2, He, Ar, and CO2 (Calibration by actual gas)
For other gases, consultation is necessary regarding whether
conversion conditions or calibration by actual gas is to be used.
Flow range (Full scale)1L, 2L, 3L, 5L, 10L, 15L, 20L/MIN
AccuracyFS±5% (Measurement point)
Proof pressure0.8 MPa for 5 L/MIN or less
0.5 MPa for 10 L/MIN or more
Available scale10:1
Body block and some
other components
SUS304, SUS303Brass
Tapered tubePyrex®, glass
FloatPyrex, SUS316, glass
Protective coverAcrylic resin
(Temperature resistance)MAX60℃
ConnectionRc1/8 (Standard); Rc1/4 (Optional)

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