FHF05SC series
4Pages

Catalog excerpts

Thermal Sensors Two self-calibrating foil heat flux sensors with thermal spreaders and heater Next-level sensors from the world market leader in heat flux measurement, FHF05SC series is a combination of our standard models FHF05 heat flux sensor and a heater. The heater allows you to perform self-tests, verifying sensor functionality and stability during use, without having to remove the sensor. FHF05SC series is ideal for high-accuracy and long-term heat flux measurement, construction of calorimeters, (zero heat flux) core temperature measurement and thermal conductivity test equipment. Available in two models: standard model size 50X50 mm and a larger size of 85X85 mm. Introduction FHF05SC series are sensors for general-purpose heat flux measurement, combined with a heater. It is used when the highest level of quality assurance is required and for long-term heat flux measurements. It is thin, flexible and versatile. FHF05SC series measures heat flux through the object in which it is incorporated or on which it is mounted, in W/m2. The sensor within is a thermopile. This thermopile measures the temperature difference across FHF05SC’s flexible body. A type T thermocouple is integrated as well to provide a temperature measurement. The thermopile and thermocouple are passive sensors; they do not require power. Figure 1 Model FHF05SC-50X50 and FHF05SC-85X85 self-calibrating heat flux sensor with heater: thin, flexible and versatile. Multiple small thermal spreaders, which form a conductive layer covering the sensor, help reduce the thermal conductivity dependence of the measurement. With its incorporated spreaders, the sensitivity of FHF05SC series is independent of its environment. Many competing sensors do not have thermal spreaders. The passive guard area around the sensor reduces edge effects and is also used for mounting. Looking only for heat flux and temperature measurement without the heater: see our FHF05 series heat flux sensors. Unique features and benefits • • • • • • • • Figure 2 FHF05SC-50X50 being installed to measure heat flux on a curved surface. heater for self-test flexible (bending radius ≥ 15 x 10-3 m) low thermal resistance wide temperature range fast response time integrated type T thermocouple robustness, including potted connection block, may be used as strain relief IP protection class: IP67 (essential for outdoor application) Copyright by Hukseflux. Version 2201. We reserve the right to change specifications without prior notice Page 1/4. For Hukseflux Thermal Sensors go to www.hukseflux.com or e-mail us: i

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Thermal Sensors integrated thermal spreaders for low thermal conductivity dependence Using FHF05SC series is easy. For heat flux measurements, it can be connected directly to commonly used data logging systems. The heat flux in W/m2 is calculated by dividing the sensor output, a small voltage, by the sensitivity. The sensitivity is provided with FHF05SC series on its product certificate. When used under conditions that differ from the calibration reference conditions, the FHF05SC series sensitivity to heat flux may be different than stated on its certificate. See the user manual for...

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Thermal Sensors Calibration FHF05SC series calibration is traceable to international standards. The factory calibration method follows the recommended practice of ASTM C1130 - 21. In a typical calibration setup as shown in figure 3, the FHF05SC series is positioned between an insulating material and a heatsink with the FHF05SC series heater on the side of the insulating material. In such a setup, the heat losses through the insulation may be ignored. Measuring the heater power (voltage Uheater square divided by resistance Rheater), and dividing by the surface area Aheater, gives the applied...

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Thermal Sensors Stable operation of the sensor can then be confirmed at any time by comparing to the reference measurement. The test protocol is as follows: 1. Make sure that the absolute temperature is similar to that during the reference measurement 2. Check the heater resistance stability; this can accurately be done because the connection is 4wire. Subtract wire-to-wire resistance from the wire-sensor-wire resistance. 3. Store the same parameters, normalise with the heater power. Normally (if the heater is stable) this process scales with V2. 4. Compare patterns of heat flux and...

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FHF05SC series 4Pages

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FHF05SC series
4Pages