DATA SHEET HFS-C
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The RdF Model 27160 Heat Flux Sensor is a differential thermopile. Heat passing through a calibrated polyimide membrane produces a small temperature differential (see thermal impedance feature). The signal is proportional to the difference in temperature and the number of junctions in the thermopiles.
 
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Features
_ Low thermal impedance
_ High sensitivity
_ Fast response
_ Wide temperature range
_ Thin and flexible

Applications Include
_ HVAC
_ Medical
_ Structural Analysis
_ Equipment Analysis
_ Safety

 

 

RdF’s new low cost planar heat flux sensor self-generates an interchangeable, linear mV measurement of heat flux in or out by all modes: convection, conduction or radiation. Output polarity defines the direction of the net total heat flux measured at up to 150°C. Exclusive features include the interchangeable mV output and a conformable, sealed configuration for lamination or surface mounted application. Edge connections can be soldered. Adhesive backing and addressable wide area sensor arrays are available. Temperature control can be enhanced by reacting to heat flux changes detected before temperature can change. Building controls systems can add real time reaction to solar and wind loads.

  

 

RdF’s Micro-Foil® Heat Flux Sensors feature true iso-thermal properties. Thermal losses are kept to a minimum and highly accurate readings are obtainable because of their extremely thin construction (Low thermal impedance). The mV or mV output is proportional to the heat flux passing through the sensor thickness. Their sensitivity is controlled by the thickness of the thermal barrier and the number of thermocouple
junctions within the sensor.
Teflon® is a registered trademark of Dupont

Operating Temperature Range
–300°F to 300°F

Heat Flow Range
Up to 30,000 BTU/(ft2•hr)
with heat-sink surface at <100°F

Typical Sensitivity
2.6µV/BTU/(ft2•hr)

Typical Response Time
0.6 seconds

Typical Thermal Impedance
0.01 °F/BTU/(ft2•hr)

Typical Thermal Capacitance
0.02 BTU/(ft2•°F)

 
_Micro-Foil® Heat Flux Sensors are simple devices that can be used to measure heat flux in discrete locations. The sensors are unique because they are very thin and provide minimal perturbations to the flow of heat. They require no special wiring, reference junctions or special signal conditioning. The accuracy of the measurement with these devices is optimized by proper installation and the ability to adequately couple the sensor to the materials surrounding it as well as to any prevailing thermal conditions such as convection currents.
_The ease of installation makes the applications for these sensors almost unlimited since the thin and flexible sensors can be attached

  _to either flat or curved surfaces and permanently bonded in place with conventional adhesives or epoxies. Once installed, the lead wires of the sensors can be connected to simple direct reading mV indicators to provide accurate measurements of heat flux.
_One of the greatest advantages of RdF’s new 27160 Heat Flux Sensor is that it is manufactured in strips of 21 sensors. It may be arranged in arrays or groups facilitating the measurement of average heat flux over large non-uniform areas.
   27160     Model Number, Heat Flux Sensor

 CALLIBRATION
  C  -  Callibration Certificate
  D  -  Output Data

 NUMBER OF LEADS
  A    No leads
  B   10 foot long leadwires
 LEAD LENGTH in inches (12 inches standard)
 A01  Single Element
 AXX  (02 thru 21 elements)
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27160
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C
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L
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A21
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_ ____ Typical write-up for 27160