Patent Profile
| Patent No: | IN306910 [India] | Application No: | 0047DEL2009 |
| Title: | Ferrofluid based temperature sensor | ||
| Issue Date: | 06-02-2019 | File Date: | 12-01-2009 |
| Inventor(s): | PANT RAJENDRA PRASAD, RANA ANU, VINOD KUMAR, JAIN VINOD KUMAR, HALDER SUJIT KUMAR, SINGH YESH PAL, VIKRAM KUMAR | ||
| IPC Classification: | G01C | ||
| Abstract: | The present invention provides a selective range temperature sensor using ferrofluid bearings. Ferrofluids are colloidal dispersion of nano size superparamagnetic particles and are technologically advanced materials having magnetic nature. The unique property of magnets levitation and sealing by ferrofluid is exploited here for making the temperature sensing device. The basic principal of the present invention is based on sensing minute change in air volume on standard gas law (PV=nRT). The device consists of a closed container with very low friction ferrofluid bearing based piston which moves when the temperature changes inside the container. The coefficient of friction of the magnets motion is tremendously reduced using ferrofluid material. An electrical signal has been produced at the output to sense the change in temperature by using AC input signal. We believe that this technique is unique for high sensitive temperature. The device as well, which is capable of sensing very low precision temperature i.e. < 2.5mK in terms of AC mV signal generated at constant atmospheric pressure. The one mV signal corresponds to 2.5 mK. This device has many useful applications viz. standards, calibration of thermometers, defense, medical and biomedical applications etc. | ||
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