HFP01 heat flux sensor

HFP01 is the world’s most popular sensor for heat flux measurement

Heat flux plate

HFP01 is the world’s most popular sensor for heat flux measurement in the soil as well as through walls and building envelopes. The total thermal resistance is kept small by using a ceramics-plastic composite body. The sensor is very robust and stable. It is suitable for long term use on one location as well as repeated installation when a measuring system is used at multiple locations. If measuring in soil, in case a more accurate measurement is needed the model HFP01SC should be considered.

Specifications

Measurand

heat flux

Measurement range

-2000 to +2000 W/m²

Sensitivity (nominal)

60 x 10⁻⁶ V/(W/m²)

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Specifications
Description
Services & Support
Applications
FAQ
Accessories

Specifications

Measurand

heat flux

Measurement range

-2000 to +2000 W/m²

Sensitivity (nominal)

60 x 10⁻⁶ V/(W/m²)

Sensing area

8 x 10⁻⁴ m²

Guard width to thickness ratio

5 m/m (as required by ISO 9869 D.3.1)

Sensor thermal resistance

71 x 10⁻⁴ K/(W/m²)

Sensor thickness

5.4 x 10⁻³ m

Uncertainty of calibration

± 3 % (k = 2)

Rated operating temperature range

-30 to +70 °C

Cable diameter

4 x 10⁻³ m

IP protection class

IP67

Standard cable length

Options

longer cable length (10, 15, 20, 30, 40 m)
BLK-80 black sticker (to measure radiative as well as convective heat flux)
GLD-80 gold sticker (to measure convective heat flux only)
BLK - GLD sticker series can also be ordered pre-applied at the factory
LI19 hand held readout unit

Downloads

HFP01 heat flux sensor brochure

HFP01 heat flux sensor user manual

Description

The world’s most popular sensor for heat flux measurement

HFP01 measures heat flux through the object in which it is incorporated or on which it is mounted, in W/m². The sensor in HFP01 is a thermopile. This thermopile measures the temperature difference across the ceramics-plastic composite body of HFP01. A thermopile is a passive sensor; it does not require power. Using HFP01 is easy. It can be connected directly to commonly used data logging systems. The heat flux in W/m² is calculated by dividing the HFP01 output, a small voltage, by the sensitivity. The sensitivity is provided with HFP01 on its calibration certificate. A typical measurement location is equipped with 2 or more sensors. HFP01 is the world’s most popular sensor for heat flux measurement in the soil as well as through walls and building envelopes.

Robust and stable

Equipped with heavy-duty cabling, protective covers on both sides and potted so that moisture does not penetrate the sensor, HFP01 has proven to be very robust and stable. It survives longterm installation in soils, as well as repeated installation when a measuring system such as TRSYS20 is used at multiple locations.

Measuring radiation and convection with HFP01 and BLK - GLD sticker series

BLK and GLD sticker series

Would you like to to study energy transport / heat flux in detail? Hukseflux helps taking your measurement to the next level: order HFP01 with 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. BLK – GLD stickers can be applied by the user to the sensor. Optionally, they can be ordered pre-applied. See the BLK – GLD sticker series user manual and installation video for instructions.

Application of this instrument

How to install a heat flux sensor

View application note

Suggested use

building heat flux
U-value and R-value measurements
soil heat flux

Areas of Application

Building physics / insulation, thermal comfort and energy budget measurement

Geotechnics / soil thermal route analysis

Meteorology / surface energy flux measurement

Scientific research / heat and heat transfer measurement

Accessories

BLK - GLD stickers

Black and gold stickers for measuring convective and radiative heat flux separately

Measurand

convective and / or radiative heat flux

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LI19

Hand-held read-out unit / datalogger

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HFP01 heat flux sensor

low thermal resistance (essential for use on walls and windows)
large guard area (required by the ISO 9869 standard)
low electrical resistance (low pickup of electrical noise)
high sensitivity (good signal to noise ratio in low-flux environments such as buildings)
robustness, including a strong cable
IP protection class: IP67 (essential for outdoor application)

Would you like a personalised quote?

or contact us: info@hukseflux.com