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 The The thin foil radiant heat flux sensor is ideal to sense the thermal radiation emitted from or absorbed by its sensing area even in the presence of heat transfer through conduction, and convection.

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Operating principle:

Thin foil flexible radiant flux sensors consist of a thermoelectric panel laminated between flexible heterogeneous plastic layers with shiny reflectors on one or their both external sides. Radiant flux sensors absorb or emit radiation in the wavelengh range from 2µm to 20µm while delivering an output voltage directly proportional to the radiant flux density (in Watt/m2). Its mean thermal emissivity can be adjusted on request in the range 0,3- 0,7. Since their introduction by CAPTEC over 10 years ago, these radiant flux sensors are used as plane black body radiometers and have demonstrated significant advantage as compared with conventional radiation sensors :

Advantage:
Precise sensing: CAPTEC radiant flux sensor are sensor components, ready to be used and directly responsive to the net thermal radiation emitted or absorbed by their sensing area. They are easy to use : you simply apply , that is past their backside to flat or curved surface and connect the terminals to any direct reading milli or microvolt meter.
Custom tailored for better fit: Size and shape possibilities are unlimited. CAPTEC builds sensors as large as 150*150mm square, as small as 5*5mm square. You can specify intricate geometries to follow the curves of your hardware. Computed aided design produces uniform or profiled heat flux sensing elements to meet your precise needs.
Integral temperature sensor: CAPTEC can furnish heat flux sensors with integral thermocouple built in the sensing area ideal for heat transfer controllers
Heat flux sensing assembly: As an added service CAPTEC can clamp heat flux sensors to mating metal parts. Our specialised equipment guarantees superior performance.
Ultra thin and low response time: the thinner, the shorter is the time required to reach its steady state sensor temperature
No dependent temperature: in the range -200°C - +200°C
Electric resistance: lower than 500 Ohm
Output wires: since a positive or negative voltage is provided depending on the heat flux orientation, no special wiring or referring junction is required
without temperature compensation

Consultancy: About the calibration............. Determination of the sensing area to obtained a specified sensitivity in actual conditions
Documentation on radiant flux measurement
Double sided radiant flux sensors..................
4pi radiant flux sensors


Applications:

- touch-less temperature measurement, conditioned air, high temperature control, process control…


Specifications:

Accuracy: Thickness of 0,4 mm, guarantees minimal disturbance
Sensing Area: Up to several dm square or ft square (precisely shaped and sized on request)
Operating temperature: from - 180°C to 250°C (-330F to 500F)
Thermal resistance: 0,006°C/W/m2 or 0,034 F/Btu/hr ft2
Input range: - 500 kW/ m2 to 500 kW/ m2
Electrical resistance about 100 ohms for a sensing area of one dm2 (0,1 ft square)
Thermal emissivity : 0,48
Instrumentation: Any voltage measuring instrument having a 0,1 mV range
Connection: either by welding or by copper Teflon insulated color coded wires.
response time:0,05 sec
Possibility to insert a thermocouple in order to measure the temperature also.
sensitivity

dimensions( mm )

Sensing surface area (cm²)

Sensitivity
µV/( W/m² )

Sensitivity
mV/( W/cm² )

10x10 1 0,1 1
50x50 25 2 ,5 25
100x100 100 10 100
150x150 225 22,5 225
300x300 900 90 900


Radiant fluxmeter back to catalogue
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