FHF06 heat flux sensor

high temperature foil heat flux sensor for temperatures up to 250 ˚C

High temperature foil heat flux sensor for use up to 250 °C; patented technology, flexible, with temperature sensor and thermal spreaders

Do you need a thin, flexible and sensitive heat flux sensor that can withstand high temperatures? FHF06 foil heat flux sensor offers all that. Rated temperature range is from –70 to +250 °C. FHF06 measures heat flux from conduction, radiation and convection. In case you do not need the high temperature range, look at the heat flux sensors of our FHF05 series. If FHF05 or FHF06 do not comply with your requirements, have a look at other heat flux sensor models for special applications.

Specifications

Measurand

heat flux
temperature

Measurement range

(-20 to +20) x 10³ W/m²

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Specifications
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Specifications

Measurand

heat flux
temperature

Outer dimensions foil with guard

(25 x 50) x 10⁻³ m

Measurement range

(-20 to +20) x 10³ W/m²

Temperature sensor

type T thermocouple, IEC 60584-1 class 2*

Thermal spreaders

included

Rated bending radius

≥ 7.5 x 10⁻³ m

Rated load on cable

≤ 1.6 kg

Sensor thermal resistance

12 x 10⁻⁴ K/(W/m²)

Sensor thickness

0.38 x 10⁻³ m

Uncertainty of calibration

± 5 % (k = 2)

Sensitivity (nominal)

5 x 10⁻⁶ V/(W/m²)

Asymmetry

< 2 %

Rated operating temperature range

Continuous use**

-70 to +250 °C

Cable

-70 to +250 °C

Connection block

-70 to +250 °C

Label at the end of the cable

-40 to +120 °C

IP protection class

IP67***

Rated operating pressure range

up to 25 bar

Standard cable length

Options

5 or 10 m cable length; separate cable; without cable****

temperature measurement uncertainty: ± 1 or 0.0075 × T °C. For details, see the user manual

when measuring at temperatures of -160 °C, contact Hukseflux.

***

see appendix on long-term use under condensing, wet and underwater conditions

****

sensor foil only (without cable and cable connection block) may be used in vacuum

Options

• with 5 or 10 metres cable length
• separate cable in 2, 5 or 10 metres length
• sensor foil only, without wiring, without connection block
• LI19 hand-held read-out unit / data logger
NOTE: LI19 measures heat flux only

Downloads

FHF06 heat flux sensor brochure

FHF06 heat flux sensor user manual

Description

Heat flux measurement in high temperature environments

FHF06 is a 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. Other members of the FHF family, sensors of the FHF05 series, can be used up to 120 °C maximum. Like all FHF sensors, FHF06 is thin, flexible and versatile.

FHF06 measures heat flux through the object in which it is incorporated or on which it is mounted, in W/m².

The sensor in FHF06 is a thermopile. This thermopile measures the temperature difference across FHF06’s flexible body. A type T thermocouple is integrated as well, to provide a measurement of temperature. The thermopile and thermocouple do not require power.

Unique features and benefits

• high temperature resistance up to 250 °C continuous use
• flexible (bending radius ≥ 7.5 x 10-³ m)
• low thermal resistance
• fast response time
• integrated type T thermocouple
• robustness, including cable connection block, for strain relief
• IP protection class: IP67 (essential for outdoor application and in humid environments)
• integrated thermal spreaders for low thermal conductivity dependence
• sensor foil only: may be used in vacuum

Easy to use

Using FHF06 is easy. It can be connected directly to commonly used data logging systems. The heat flux in W/m² is calculated by dividing the FHF06 output, a small voltage, by the sensitivity. The sensitivity is provided with FHF06 on its certificate.

Robust and stable

Equipped with a potted cable connection block, that prevents moisture from entering and may also serve as strain relief, FHF06 has proven to be very robust and stable.

Working with heat flux sensors

When used under high temperature conditions, the FHF06 sensitivity to heat flux may be different than stated on its certificate. See the user manual for correcting this temperature dependence. For mounting, see our application note how to install a heat flux sensor.

Suitable electronics

The combined measurement of heat flux and temperature offers you a full picture of the thermal behaviour of a system. Heat flux sensor output is a small millivolt signal. Heat flux sensors are often combined with thermocouples. We have several preferred solutions for amplification, data logging and data visualisation. See our application notes on sensor amplification or FHF sensors with Hioki dataloggers.