FTM94/95 Industrial High Accuracy Thermal Mass Flow Transmitter
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 : 0 ... 40 m/s : ±(1% of mv+0.5 m/s), 40 ... 60 m/s : ±(1% of mv+1 m/s), 90 ... 120 m/s : ±(1% of mv+1.5 m/s)
IP rating : IP67(Probe) / IP65(Housing)
FTM94/95 Industrial High Accuracy Thermal Mass Flow Transmitter
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 : 0 ... 40 m/s : ±(1% of mv+0.5 m/s), 40 ... 60 m/s : ±(1% of mv+1 m/s), 90 ... 120 m/s : ±(1% of mv+1.5 m/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.
Specification
Input | |
Input type | Pt20 / Pt300 (Air velocity) / Pt1000 (Temp.) |
Measuring range | 0 ... 120 Nm/s |
Minimum initial value | 0.1 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 | 0 ... 40 m/s : ±(1% of mv+0.5 m/s) |
Temp. influence | 0.1% / °C |
Repeatability | 0.5% |
Uncertainty of factory calibration | ±1% |
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 | SUS316 |
Remote probe cable | TEFLON (Remote FTM95) |
Weight | FTM94 : 720 g / FTM95 : 832 g |
Applications
Exhaust gas removal / Dust environment / Slightly corrosive environment / Burner feeder / Biotechnology industry / Factory building air intake / Exhaust calculation