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.