Heat Flux Sensors of HTX series
Heat Flux Sensors of HTX series – the series of ultra-high sensitive and self-calibrating Sensors with integrated Pt1000 thermistors. The Sensors are developed as a series of a range of sizes (diameters): 9, 16, 24, and 30 mm. Optional dimensions (size and thickness) as well as customized performance parameters are available on request. The Sensors were developed for measurement of conductive, convective and radiation heat fluxes in a wide range of heat flux intensities. The high sensitivity of the Sensors of the series provides accurate experiments and data on objects of investigations.
One of the feature of the Sensors is the self-calibration method (patent pending RU2014145948 dated 17.11.2014). It means possibility to calibrate precisely the Sensor by measurement of its thermoelectric performance parameters. It is not necessary to remove it and send to labs.
The calibration procedure is possible with use of Datalogger device of the DX8140 series, specially developed for thermoelectric Heat Flux Sensors, or by use of Z-meters. The calibration procedure is described in HTx Sensors Manual, Chapter 9.
HEAT FLUX SENSORS HTX SERIES KEY ADVANTAGES
The Heat Flux Sensors of the HTX series – the series of high sensitive and self-calibrating Sensors with integrated Pt1000 thermistors. The Sensors were developed for measurement of conductive, convective and radiation heat fluxes in a wide range of intensities.
HTx Heat Flux Sensors have a round shape. Inside there is an integrated miniature thermoelectric module and a Pt1000 thermistor. Electric connections come from the parts by a miniature FEP Flat Ribbon Cable (0.025” Pitch, 32 AWG). The standard length is 180 cm (6”). The cable output is ended by a 6pin miniature connector, type DFMC 0.5/6-ST-2.54 (Phoenix). Both sides of the Sensors are aluminum covered with black paint stable for working in wet ambient and even under water. Internal ambient of the Sensor is potted by a silicon compound of high temperature stability.
Specification
| Product name | HTD03-032-05D09 | HTD03-128-05D16 | HTD03-288-05D24 | HTD03-512-05D30 | |
| Detector Type | Thermoelectric | ||||
| Surface material | Aluminum, painted black | ||||
| Protection 2) | IP67 | ||||
| Surface dimensions, dia. A | mm2 | 9 | 16 | 24 | 30 |
| Sensing area S | mm2 | 64 | 201 | 452 | 707 |
| Thickness H | mm | 2.3 | 2.3 | 2.3 | 2.3 |
| Pellet pairs | 32 | 128 | 288 | 512 | |
| Sensitivity Se | uV/W/m2 | 40 | 150 | 345 | 570 |
| Integral sensitivity Sa | V/W | 0.69 | 0.77 | 0.77 | 0.81 |
| Heat Flux Range Pe , ± | W/m2 | 2500 | 3000 | 3000 | 3500 |
| Integral Heat Flux P a , ± | W | 0.2 | 0.7 | 1.5 | 2.6 |
| Thermal Time Constant t | S | 4.5 | 4.2 | 4.2 | 4 |
| Thermal Resistance RT | K/W/m2 | 0.00334 | 0.00294 | 0.00294 | 0.00273 |
| Integral Thermal Resistance RT | K/W | 52.5 | 14.6 | 6.5 | 3.9 |
| Electrical Resistance ACR | Ohm | 3.6 | 14.2 | 32 | 56.9 |
| Temperature Dependence 3) dS/dT | %/°C | 0.2 | 0.2 | 0.2 | 0.2 |
| Linearity with Power dS/dP,± | %/W/m2 | 0.000667 | 0.000589 | 0.000589 | 0.000547 |
| Homogeneity dS/dA, ± | % | 1 | 1 | 1 | 1 |
| Calibration Accuracy, ± | % | 3 | 3 | 3 | 3 |
| Calibration Temperature Range | °C | -40 … +85 | -40 … +85 | -40 … +85 | -40 … +85 |
| Operating Temperature Range | °C | -50 … +150 | -50 … +150 | -50 … +150 | -50 … +150 |
| Max. compressive force for clamping | kg | 3 | 12 | 26 | 46 |
| Thermistor | Pt1000 (1%, 0,375%/°C) | ||||
| Cable 4) Length L | cm | 180 | 180 | 180 | 180 |
| Connector 5) | FMC 0,5/6-ST-2,54-18211355 | ||||
1) Performance parameters shown in specifications are given for ambient temperature Ta=300 K (27 °C)
2) Application in water - not more than 1 hour. Maximal temperature 100°C.
3) Average value at Ta=300 K (27 °C). Detailed temperature dependence is given in table
4) Sensor is equipped with thin FEP Flat Ribbon Cable, 0.025” Pitch, 32 AWG, 1,8 m. Wire resistance 0,54 Ohm/m
5) Cable is ended (optionally) by miniature connector FMC 0,5/6-ST-2,54-18211355 (Phoenix). The female part must be - MCV 0,5/6-G-2,54 SMD R44-1821588