Kofloc EX700 Mass Flowmeter

Kofloc EX-700 is a EXE-FLOW family digital mass flow meter with display. The EX-700 mass flowmeter is suitable for N2 gases application.


Kofloc EX-700 Digital Mass Flow Meter with Display the EXE-FLOWTM was commercialized “Exact measurement” and “Excellent function as a concept. This is covered from a small flow rate (F.S.10sccm) to a large flow rate (F.S.200slm) and the 11 flow ranges are ready as s standard stock.




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.


  • Accurate flow measurement and Excellent function
  • Full scale 10sccm to 200SLM
  • 11 range standard stock for fast delivery
  • RS-485 communication
  • RoHS, CE compliant
  • Compact design
  • Single power supply connection
  • Gas select switch


Sensor typeThermal (EX sensor)
Flow range(N2)10 /50 /100 /500SCCM 1 /5 /10 /20SLM50 /100 /200SLM
Applicable gases*1N2(Air, H2, He, Ar, O2, CO2, and C.F.)N2(Air, Ar, and C.F.)
Responsewithin 2sec
Accuracy*2± 1.0%F.S. (25℃ )± 1.5%F.S.(25℃ )
Temperature coefficient± 0.2%F.S./℃ (15 ~ 35℃ ) ※ 200SLM ± 0.4%F.S./℃
Repeatability± 0.2%F.S.
Proof pressure980 k Pa(G)
Working Temp.5 ~ 50℃
Allowable storage temp.-10 ~ 60℃
Materials of a gas contact partSUS316, SUS316L, PTFE, FKM (optional NBR,CRP)
Electrical connectionDC power plug and D-sub 9 pin male
Digital communicationRS485(MODBUS protocol, RTU mode)
Required power supply (DC)24VDC( ± 10%) 100mA
Joint1/4F900 (standard)3/8F900 (standard)
Needle valve (option)MODEL2412MODEL2412D
SignalEvent output2 x NPN open collector output, integrating pulse output (Maximum rating DC30V 50mA)
Flow output*3)① 4 ~ 20mA ② 0 ~ 5V ③ 1 ~ 5V
WeightApprox. 600g (without fittings)Approx. 700g (without fittings)

Additional Information


  • Power supply adaptor: model PSK-85 (cable length, 1.8m)
  • Electrical cable: model CP-EX-700-※ (※Cable length: -1M, -3M, -5M). In case of the use at the place with strong noise influence, it is recommended to assemble the ferrite core with
    the power supply adaptor.

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