FHF05 series heat flux sensors

Sensors of the FHF05 series are suitable for general-purpose heat flux measurement. 

The range consists of five different dimensions. Larger dimensions mean a higher sensitivity and a larger area over which the heat flux is averaged. All incorporate a Type T thermocouple for surface temperature measurement. 

They are thin, flexible and versatile. FHF05 series models measure heat flux through the object in which it is incorporated or on which it is mounted, in W/m². The thermocouple is integrated to provide a measurement of surface temperature. The thermopile and thermocouple are passive sensors; they do not require power. Rated temperature range is from -70 to +120 °C.

Easy to use

Using FHF05 is easy. It can be connected directly to commonly used data logging systems. The heat flux in W/m² is calculated by dividing the FHF05 output, a small voltage, by the sensitivity. The sensitivity is provided with FHF05 on its certificate. The thermocouple can be connected to a normal thermocouple input channel. 

Unique features and benefits

• flexible (bending radius ≥ 7.5 x 10⁻³ m)
• low thermal resistance
• wide temperature range 
• fast response time
• large guard area
• integrated type T thermocouple
• robustness, including connection block, for strain relief
• IP protection class: IP67 (essential for outdoor application)
• integrated thermal spreaders for low thermal conductivity dependence

Suggested use

FHF05 series can be used for general-purpose surface temperature and heat flux measurement, often applied as part of a larger test- or measuring system. FHF05SC series on the other hand, are self-calibrating versions of the standard FHF05 models, combined with a HTR02 series heater. FHF05SC series is used when the highest level of quality assurance is required and for long-term heat flux measurement. The self-calibrating sensor is available in models 50X50 and 85X85. 

Typical applications per model

• 10X10: high power microchips
• 15X30: high heat flux in ovens
• 50X50: general purpose, battery thermal management
• 15X85: wrapped around a pipe
• 85X85: low heat fluxes, insulation performance testing, low accuracy dataloggers & amplifiers 

Black and gold stickers

Would you like to study energy transport / heat flux in detail?

Order our radiation-absorbing black and radiation-reflecting gold stickers. You can then measure convective + radiative flux with one, and convective flux only with the other. Subtract the 2 measurements and you have radiative flux.

These stickers can be applied to the sensor by the user. There are stickers for every sensor dimension. Optionally, they can be ordered pre-applied. 

Sensor for use up to 250 °C

Do you need a thin, flexible and sensitive heat flux sensor that can withstand high temperatures?

FHF06 is our newest high temperature foil heat flux sensor that can be used for temperatures up to 250 °C. This is made possible by its all-polyimide design, not using any glues.

Rated temperature range is from -70 to +250 °C. FHF06 measures heat flux from conduction, radiation and convection.