• eYc FTM94/95 Industrial Grade High Accuracy Thermal Air Velocity Transmitter

eYc FTM94/95 Industrial Grade High Accuracy Thermal Air Velocity Transmitter

Input type:Pt20 / Pt300(Air velocity),Pt1000(Temp.)
Measuring range:0 ... 120 Nm/s
Output signal:4 ... 20 mA / 0 ... 10 V / RS-485 / Impulse
Installation:Duct type / Remote type
IP rating:IP67
Model : eYc FTM94FTM95

● 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.
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

*Please make sure the product and the device which connect with RS-485 are on common ground, 
avoid damaged product.

*The specifications contained herein are subject to change without notice and any user of said specifications should verify from the manufacturer that the specifications are currently in effect. Otherwise, the manufacturer assumes no responsibility for the use of specifications which may have been changed and are no longer in effect. 
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