• FTM94/95 Industrial Grade High Accuracy Thermal Mass Flow Transmitter

FTM94/95 Industrial Grade High Accuracy Thermal Mass Flow Transmitter

Model : FTM94FTM95
Features : Designed for industrial application. Air flow measurement up to 120 m/s. Resistant to high temperature, high pressure, dust, and corrosion.
Sensor type : Pt20 / Pt300(Air velocity) / Pt1000(Temp.)
Measuring range : 0 ... 120 Nm/s
Output : 4 ... 20 mA / 0 ... 10 V / RS-485 / Impulse
Accuracy : ±1.5% F.S.
IP rating : IP67(Probe) / IP65(Housing)
  • Features
    ● IP67 Rugged stainless steel case, fit in variety harsh environment
    ● Easy to install, imported sensing element, high accuracy, long-term stability
    ● Switch multifunction physical quantities(Air velocity and volume):[m/s]、[ft/s]、[Nm3/h]、[Nm/s]、[L/min]、[m3/min]
    ● LCD Display of air velocity and temperature
    ● LCD Display of cumulative flow : m3, L (Option)

    FTM94/95 Hot wire thermal air velocity transmitter working at a constant Temp. using King's law heat balance equation for:

    e Sensor voltage output(V)
    Zero output of constant temperature hot wire anemometer, can use CTA circuit as temperature compensation
    b': Sensitivity of the sensor, related to the operating temperature
    v: Fluid flow rate
    n: 0.45 ... 0.5(Standard)
    Can be calculated from the formula characteristic curve of constant Temp. hot wire anemometer, special three PT probe and full metal housing design, high accuracy, suitable for a variety of pipe diameters, widely used in industrial fields.
  • Applications
    Exhaust gas removal / Dust environment / Slightly corrosive environment / Burner feeder / Biotechnology industry / Factory building air intake / Exhaust calculation
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  • Specification
    Input type:Pt20 / Pt300 (Air velocity) / Pt1000 (Temp.)
    Measuring range:0 ... 120 Nm/s
    N : Working condition (Definition : 20°C at 1013 hPa) Units can be converted Nm/s (Flow rate) or Nm3/h(Flow)(Option) or m3(Cumulative flow)(Option)
    Minimum initial value:0.15 Nm/s

    Installation angle effect(When the installation angle<10°):<3% of the measured value
    Signal:4 ... 20 mA / 0 ... 10 V / RS-485 / Impulse
    Preset output:Out1 : Air velocity;Out2 : Impulse
    Impulse range (1 ... 500 Hz):(1)1 ... 500 Hz : 4 ... 20 mA (2)1 ... 500 Hz : 0 ... 10 V
    Signal connection:3-wire
    Warm-up time:<60 sec
    Reaction time:t90<5 sec
    Display type:LCD Module with back light, double-row(Up air velocity, down temperature(Default: 0 ... 120°C))
    Load resistance:Current output : ≦500 Ω / Voltage output : ≧100 KΩ

    Accuracy:±1.5% F.S. (Option ±1%)
    Temp. influence:0.1% / °C

    Power supply:DC 24 V±10%
    Current consumption:<0.3 A
    Overvoltage protection:DC : <40 V
    Electrical connections:M12 connector / M16 metal cable gland

    Measuring medium:Air
    Operating Temp.:-20 ... +60°C
    Operating Humid.:0 ... 95%RH(Non-condensing)
    Probe operating Temp.:0 ... 120°C / Option:200°C(Increasing operating temperature will affect air velocity error)
    Storage Temp.:-20 ... +60°C
    Storage Humid.:0 ... 95%RH(Non-condensing)
    Probe pressure:16 bar

    Fixed seat:1/2″PT movable thread
    Installation:Duct type / Remote type

    IP rating:IP67(Probe);IP65(Housing)
    Electrical protection:■ Reverse polarity ■ Over-voltage ■ Short-circuit


    Housing:Aluminum alloy
    Weight:FTM94 : 720 g / FTM95 : 832 g

Note : Design and specifications are subject to change without notice.
Note : If the product has RS-485 function, to avoid damaging product, please make sure the product and the device which connect with RS-485 are on common ground.