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  • Kofloc EX-250S Series Digital Mass Flow Meter

    Kofloc EX-250S Mass Flow Meter
    Digital mass flow device which is adopted the own developed both stable high-speed thermal sensors and small proportional solenoid valves and is realized high accuracy and quick response with RS 485 communication in spite of compact.

    Feature

    • Lower cost but high accuracy measurement
    • High-speed response and zero stability
    • 0-5VDC or 4-20mA Input/output signal and +/-15VDC or 24VDC power supply
    • Mediocrity D-sub 9pin
    • Gases registered in EX-250S are usable by rotary-switch
      *Calculate the flow rate with conversion factor based onN2 gas
    • RoHS compliance, CE marked
      Another Article:

    Specification

    ModelMass Flow ControllerMass Flow Meter
    EX-250SCEX-250SM
    Sensor typeThermal sensor
    Valve typeNormally closed proportional solenoid valve
    Applicable gases(*1)N2、Air、H2、He、Ar、O2、CO2 etc.
    (Gases not specifically mentioned here are subject to calibration for N2 equivalent.)
    Flow range(*2)10SCCM ~ 5SLM
    Control(measure)range2 ~ 100%(F.S.)
    Response≤ 1sec (within ± 2%F.S.)(*8)
    Accuracy(*3)± 1.0%F.S.
    Repeatability± 0.2%F.S.
    Operating differential pressure(*4)50 ~ 300kPa(Ar、CO2:100kPa ~ 300kPa)
    Inlet maximum pressure500kPa(G)
    Proof pressure980kPa(G)
    External leak rate(He)≤ 1.0 × 10-8Pa・m3/sec
    TemperatureWorking temp.5 ~ 50℃
    Accuracy guaranteed temp.15 ~ 35℃
    Allowable storage temp.-10 ~ 60℃
    Allowable operating humidity10 ~ 90%RH (without dew condensation)
    Materials of a gas contact partSUS316, SUS316L, magnetic stainless steel(*5), PTFE, FKM
    Electrical connectionDsub 9pin KFC Standard(SEMI standard is compliant)
    HR-10A
    Flow rate setting signal0~5VDC(input impedance: approx. 1M Ω)
    or 4~20mA(input impedance: approx. 250 Ω)
    Flow rate output signal0 ~ 5VDC( load resistance ≧10k Ω)
    or 4 ~ 20mA( load resistance ≧500 Ω)
    Digital communicationRS485 rotary-switch address setting
    Required power supply (DC)+15VDC( ± 5%)100mA , -15VDC(± 5%)150mA
    or +24VDC(± 10%) ≤180mA  (MFM would be ≤100mA)
    Joint(*6)1/4F900(standard)
    Mounting postureHorizontal installation recommended.
    Weight(*7)Approx.500gApprox.440g

    For further information please contact : marketing@wmablog.com
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