Thin-Film Heat Flux Sensors
Ideal for Precise Heat Transfer Measurement
HFS
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| Features |
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Effective for Convection, Conduction and Radiation Heat
Transfer |
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Conveniently
Interfaces with Voltmeters and Recorders |
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Easily
Attaches to Curved and Flat Surfaces |
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Temperature
Range from -200 to 150°C (-330 to 300°F) |
| Applications |
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Determining
Thermal Properties of Materials |
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Monitoring
Structural Heat Transfer |
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Process
Control in Heat Treating, Rolling Mills, and Glass Production |
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Determining
Heat Loss and Insulation Efficiency in Housing |
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Analyzing Aerodynamic Wind Tunnels |
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 Each
HFS series Heat Flux Sensor functions as a self-generating thermopile
transducer. It requires no special wiring, reference junctions or
signal conditioning. A readout is accomplished by connecting a sensor
to any direct reading dc microvoltmeter or recorder.
The HFS series sensor is designed for precise measurement of heat
loss or gain on any surface. It can be mounted on flat or curved surfaces,
and employs butt-bonded junctions with a very low thermal profile
for efficient reading. The sensor is available with an integral thermocouple
for discrete temperature measurement needed to describe the heat flux,
and is available in two different sensitivity ranges. All models utilize
a multi-junction thermopile construction. The carrier is a polyimide
film which is bonded using a PFA lamination process.
Specifications
Upper Temperature Limit: 150°C (300°F)
Number of Junctions:
HFS-3: 54
HFS-4: 112
Carrier: Polyimide Film (DuPont Kapton)
Sensor Resistance:
HFS-3: 140 ohms
HFS-4: 175
ohms
Lead Wires: #30 AWG Solid Copper, PFA Insulated color
coded, 3.1 m (10' long)
Weight: Models HFS-3 and HFS-4, 1.0 oz |
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To
Order (Specify
Model No.)
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Model
No.
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Nominal † Sensitivity
(µV/Btu/Ft2-Hr)
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*Max
Rec'd Heat Flux (Btu/Ft2Hr)
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Built-in
T/C
Type K
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Resp.
Time (sec)
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Thermal
Capacitance
(Btu per Ft2-°F)
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Thermal
Resistance (°F per Btu/Ft2-Hr)
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Nominal
Thickness
mm (inches)
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HFS-3
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3.0
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30,000
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YES
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0.60
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0.02
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0.01
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.18
(0.007)
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HFS-4
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6.5
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20,000
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YES
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0.60
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0.02
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0.02
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.18
(0.007)
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*Exceeding
the maximum recommended heat flux can result in a large enough temperature
rise to cause delamination of the Kapton bonding material. The given
maximum values assume a 38°C (100°F) ambient
† Nominal sensitivity is ±10%. Sensitivity is supplied with unit.
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† All dollar amounts on this site are shown in US currency.
Note: Other sizes and styles available, consult Sales or Applications Engineering.
Comes with complete operator’s manual and sensitivity calibration.
Ordering Example: (1) HFS-4 thin-film heat flux sensor = $249
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