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)
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)
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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:
e2=a'+b'vn
e: Sensor voltage output(V)
a':
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.
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ApplicationsExhaust gas removal / Dust environment / Slightly corrosive environment / Burner feeder / Biotechnology industry / Factory building air intake / Exhaust calculation
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SpecificationInput
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
Output
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
Accuracy:±1.5% F.S. (Option ±1%)
Temp. influence:0.1% / °C
Repeatability:0.5%
Electrical
Power supply:DC 24 V±10%
Current consumption:<0.3 A
Overvoltage protection:DC : <40 V
Electrical connections:M12 connector / M16 metal cable gland
Environmental
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
Installation
Fixed seat:1/2″PT movable thread
Installation:Duct type / Remote type
Protection
IP rating:IP67(Probe);IP65(Housing)
Electrical protection:■ Reverse polarity ■ Over-voltage ■ Short-circuit
Certification
Certification:CE
Material
Housing:Aluminum alloy
Probe:SUS304
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.