eyc-tech FTM94/95 Industrial Grade High Accuracy Thermal Mass Flow Transmitter

Product catalog summary

Introduction
The FTM94/95 is a high-accuracy thermal mass flow transmitter designed for industrial applications. It operates using a constant temperature hot wire anemometer and is suitable for various pipe diameters. The device is widely used in harsh environments, including exhaust gas removal, dust environments, and slightly corrosive conditions.

Specifications

Measuring Range: 0.2 m/s to 60 m/s for air velocity, with air volume ranging from 0.5 m³/h to 1000 m³/h.
Output Options: 4-20 mA, 0-10 V, RS-485, and impulse signals.
Accuracy: ±1.5% F.S. with an optional ±1%.
Operating Temperature: -20°C to +60°C, with probe temperatures up to 120°C or optionally 200°C.
Protection: IP67 for the probe and IP65 for the housing, with electrical protections against reverse polarity, over-voltage, and short-circuit.

Features

Rugged aluminum alloy case suitable for harsh environments.
Easy installation with high accuracy and long-term stability.
Switchable physical quantities including m/s, ft/s, Nm3/h, Nm/s, L/min, and m3/min.
LCD display for air velocity and temperature, with an optional cumulative flow display.

Applications
The FTM94/95 is ideal for industrial processes flow monitoring, including applications in the biotechnology industry, factory building air intake, and burner feeders.

Installation and Connections
The device can be installed using a 1/2″PT movable thread and is available in duct and remote types. Electrical connections include M12 connectors or M16 metal cable glands.

Measurement Principle
The device uses the hot-wire measurement principle, where heat is abstracted from a heated body by an enveloping gas flow. The heat loss depends on the number of molecules colliding with the heated resistor.

Ordering Guide
Options include different measuring ranges, output types, remote probe cable lengths, and display options. Calibration and test reports are available from YUDEN-TECH CO., LTD.

Catalog excerpts

eyc-tech FTM94/95 Industrial Grade High Accuracy Thermal Mass Flow Transmitter-1

Industrial High Accuracy Thermal Mass Flow Transmitter Suitable for harsh environments, industrial processes ﬂow monitoring or slightly corrosion compressed air IP67 Rugged aluminum alloy case, ﬁt in variety harsh environment Easy to install, high accuracy, long-term stability Switchable physical quantities : m/s, ft/s, Nm3/h, Nm/s, L/min, m3/min (Air velocity & volume) 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) a' : Zero output of constant temperature hot wire anemometer, Can use CTA circuit b' : Sensitivity of the sensor, related to the operating temperature v : Fluid ﬂow rate 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. Exhaust gas removal / Dust environment / Slightly corrosive environment / Burner feeder / Biotechnology industry / Factory building air intake / Exhaust calculati

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eyc-tech FTM94/95 Industrial Grade High Accuracy Thermal Mass Flow Transmitter-2

Input type Measuring range Operating Humid. Preset output Signal connection Reaction time Display type Duct type Remote type (Up air velocity, down temperature(Default: 0 ... 120°C)) Electrical protection IP67(Probe)；IP65(Housing) ■ Reverse polarity ■ Over-voltage Temp. inﬂuence Certiﬁcation Certiﬁcation Overvoltage protection Current consumption Aluminum alloy Remote probe cable Electrical connections Power supply M12 connector / M16 metal cable gland | 3-Cycle curve | Ascending line Descending line Total average line Probe pressure LCD Module with back light, double-row Load resistance will...

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eyc-tech FTM94/95 Industrial Grade High Accuracy Thermal Mass Flow Transmitter-3

| Dimension | Unit : mm FTM94 (Duct) M12 connector/ M16 metal cable gland M12 connector/ M16 metal cable gland Length as request (Max. length : 5 m) Wire diameter : ∅5 ... 5.5 mm 1/2″PT movable thread Flow sensor short probe : Right side | Electrical Connector | Unit : mm M type : M12 connector (RS-485+analog） N type : M16 metal cable gland (RS-485+analog） 104

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eyc-tech FTM94/95 Industrial Grade High Accuracy Thermal Mass Flow Transmitter-4

Power supply Power supply Brown Black *Please make sure the product and the device which connect with RS-485 are on common ground, avoid damaged product. | Hot-wire measurement principle | The thermal measuring principle abstraction of heat from a heated body by an enveloping gas ﬂow (Hot-ﬁlm Anemometer) The loss of heat depends on the number of molecules that collide with Rh m : Mass ﬂow Ih Rh : Platinum thin-ﬁlm resistor ‒ electrically heated Rt : Platinum thin-ﬁlm resistor ‒ gas temperature | Ordering Guide | Installation 94 : Duct type 95 : Remote type : Heating current Measuring range Remote...

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