Mô tả sản phẩm
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.Applications
Exhaust gas removal / Dust environment / Slightly corrosive environment / Burner feeder / Biotechnology industry / Factory building air intake / Exhaust calculation
Specification
Input
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
＜3% of the measured value (When the installation angle＜10°)
Output
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 VSignal 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 KΩAccuracy
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
SS304 ( Option SUS316 )
Remote probe cable
TEFLON (Remote FTM95)
Weight
FTM94 : 720 g / FTM95 : 832 g
