Products | Applications | Services | F.A.Q | About us |       Captec | Map | Contact us
 Products  /  Catalogue  /  High sensitivity thermal fluxmeter back to catalogue

 The high sensitivity thermal fluxmeter is a sensor that permit to measure the heat transfer (convection, conduction and radiation) that cross the sensor with a very high sensitivity. It gives an exit tension that is proportional to the flux.

conductifs.jpg (210175 octets)
Operating principle:

The sensitive element is a self generating thermopile panel comprising numerous plated junctions uniformly distributed over its sensing area. The thermopile panel is integrated inside a thin heterogeneous structure designed to be locally responsive to heat flux. Since the heat sensor can provide positive or negative output voltages depending on the heat flux orientation, it requires no special wiring, nor referring junction or signal conditioning.
The heat flux sensing patterns in this case are profiled which permit to have a higher sensitivity at the places where heat transfer is lower.

Advantage:
Ultra thin: the local temperature increase across the sensor thermal resistance by the heat flux is minimized, and the period of time needed to reach the steady state of heat flow inside the sensor is minimized.
No dependent temperature: the greatest advantage of the Captec sensor is to have a sensitivity which no temperature is dependent between the range extending from - 200°C to +200°C.
Flexibility: Size and shape on request, custom made for all types of special application, can be mounted on all surface types (flexible), option thermocouple.
Measurement: Short response time, very high sensitivity, low electrical resistance.


Applications:

Numerous applications: Heat flux measurement, thermal process regulation, testing of thermal insulation, detection of frost/polymerisation/state change….when for example the environment impede to use a great one.


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: 0,3 sec
Possibility to measure the temperature also with thermocouples type T integrated in the sensor.
Sensitivity:

dimensions( mm )

Sensing surface area (cm²)

Sensibility
µV/( W/m² )

Sensibility
mV/( W/cm² )

10x10 1 0,6 6
50x50 25 15 150
100x100 100 60 600
150x150 225 135 1350
300x300 900 360 3600


High sensitivity thermal fluxmeter back to catalogue
  Products | Applications | Services | F.A.Q | About us | | Map | Contact us