The FHF05 series thin-film heat flux sensor quantifies heat flow. It can measure the average heat flux at the attached location.
The FHF05 is the ideal sensor for those considering heat flow measurement. The FHF05 series offers five different models with varying sizes and sensitivity coefficients, allowing you to choose according to your needs. All models are flexible and come with an integrated T-type thermocouple, equipped with a thermal spreader* to reduce dependence on thermal conductivity. The rated temperature range is –70 to +120°C. The FHF05 measures heat flow from conduction, radiation, and convection. Optionally, all five models can use black BLK stickers and gold GLD stickers to individually determine heat transfer due to radiation and convection.
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basic information
The heat flow sensor measures the heat flux passing through itself. The heat flux is expressed in units of W/m². The FHF05 outputs the representative heat quantity of the location where the sensor is attached. The sensing element of the FHF05 is made of a thermopile (a collection of thermocouples). The thermopile measures the temperature difference between the front and back of the sensor. The FHF is a passive sensor that does not require a power supply, and since the temperature difference between the front and back is usually very small, it results in a small voltage output. The sensor has a specific coefficient assigned to it, and by multiplying the output voltage by this coefficient, it can be converted to heat flow. To minimize the hindrance of heat flow by the sensor itself, there is a spacer (metal plate) inside, allowing for high-precision heat flow measurement. Since the output is a voltage signal, it can be measured with a general data logger, but we recommend using HIOKI data loggers, which allow for easy input of coefficients and temperature correction settings.
Price information
- CHF-FHF05-SS-02 50,000 yen Outer dimensions 10x10mm, 2m cable with T-type thermocouple - CHF-FHF05-S-02 50,000 yen Outer dimensions 15x30mm, 2m cable with T-type thermocouple - CHF-FHF05-LG-02 100,000 yen Outer dimensions 15x85mm, 2m cable with T-type thermocouple - CHF-FHF05-M-02 84,000 yen Outer dimensions 50x50mm, 2m cable with T-type thermocouple - CHF-FHF05-L-02 50,000 yen Outer dimensions 85x85mm, 2m cable with T-type thermocouple *Prices are excluding tax.
Price range
P2
Delivery Time
P4
Applications/Examples of results
Automotive-related: Thermal evaluation of EV batteries, heat sinks, transmissions, etc. Industrial plants: Evaluation of heat dissipation in piping. Architecture: Performance evaluation of insulation materials, heating efficiency, building materials, window frames, and glass. Measurement of electronic substrates: Heat generation from ICs and heat sinks. Comfort evaluation: Heat generation from the human body and evaluation of clothing.
Detailed information
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The heat flow sensor measures the heat flux passing through itself. The heat flux is expressed in units of W/m². The FHF05 outputs the representative heat quantity of the location where the sensor is attached. The sensing element of the FHF05 is made up of a thermopile (a collection of thermocouples). The thermopile measures the temperature difference between the front and back of the sensor. The FHF is a passive sensor that does not require a power supply, and since the temperature difference between the front and back is usually very small, it results in a small voltage output. The sensor has a specific coefficient assigned to it, and by multiplying the output voltage by this coefficient, it can be converted to heat flow. Thermocouples made of dissimilar metals are embedded in large quantities. A single thermocouple generates a voltage according to the temperature difference between the hot junction on the front of the sensor and the cold junction on the back. The signal is amplified by thermocouples connected in series. In a steady state, the heat flux is proportional to the temperature difference between the front and back of the sensor and the thermal conductivity of the sensor body.
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The FHF05 series has high flexibility and can be bent up to a radius of 7.5mm.
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Heat flow measurements are always influenced by radiation, conduction, and convection. If you want to measure radiation and convection separately, it is possible to measure them individually by using the "black" and "gold" sticker options. The "black" reacts to both radiation and convection. The "gold" reflects radiation, thus only reacting to convection. Therefore, the following calculations hold true: Radiation measurement + Convection measurement = Black Convection measurement = Gold Radiation measurement = Black - Gold Each sticker can also be applied later to standard heat flow sensors; if specified at the time of order, we can apply them before shipping.
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【Recommended Logger】 HIOKI Thermal Flow Logger LR8432 - Measures the amount and flow of heat using thermal flow sensors - Can also measure temperature and voltage - Measurement data can be recorded on a USB memory stick for easy transfer to a PC! Long-term measurements can be reliably recorded on a trusted CF card! - 10-channel isolated analog input, maximum sensitivity of 10mV - Maximum sampling rate of 10ms across all channels - Simultaneously records both raw waveforms and processed waveforms (such as waveform calculations for thermal transmittance) - Double gauge allows for the display of two scales
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【Recommended Logger】 HIOKI Memory HiLogger LR8450-01 (Wireless LAN Model) - Wireless LAN model / Direct connection unit, expandable with wireless unit for up to 330 channels - Measures output voltage from various sensors such as pressure with 1ms sampling - Directly connects strain gauges and measures with the fastest 1ms sampling - Stable measurements even in high voltage and high frequency environments like inverters, significantly reducing noise influence - Using a wireless unit allows for the shortest wiring length of signal lines, preventing troubles - By using a logger with wireless LAN, data from distant locations can be observed on a PC
Line up（6）
| Model number | overview |
|---|---|
| CHF-FHF05-SS-02 | Shape 10x10mm with 2m cable T-type thermocouple |
| CHF-FHF05-S-02 | Shape 15x30mm with 2m cable T-type thermocouple |
| CHF-FHF05-LG-02 | Shape 15x85mm with 2m cable T-type thermocouple |
| CHF-FHF05-M-02 | Shape 50x50mm with 2m cable T-type thermocouple |
| CHF-FHF05-L-02 | Shape 85x85mm with 2m cable T-type thermocouple |
| In addition to the above, 5m and 10m cables are available in the standard lineup. |
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Company information
A system integrator is a business that consistently undertakes tasks such as system design, construction, implementation, maintenance, and operation. At Climattec, we often receive inquiries like, "Can you measure this?" As a system integrator specializing in natural measurements, we have a proven track record in various natural environments, and we can provide the best proposals under any conditions, whether in deserts, snowy mountains, or at sea.