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)
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:
| 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
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Specification
Input |
|
Input type |
Pt20 / Pt300 (Air velocity) / Pt1000 (Temp.) |
Measuring range |
0 … 120 Nm/s |
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 |
Signal connection |
3-wire |
Warm-up time |
＜60 sec |
Reaction time |
t90＜5 sec |
Display type |
LCD Module with back light, double-row |
Load resistance |
Current output : ≦500 Ω |
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 |
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 ) |
Weight |
FTM94 : 720 g / FTM95 : 832 g |