Development of high Precision Temperature Sensing device by MURATA
With miniaturization of electronic equipment and with their increasing mounting density, temperature control is becoming an ever vital issue to tackle. Also use of lithium-ion rechargeable batteries as the energy source for electronic equipment such as note-size PCs and electronic tools and HEVs is becoming more common creating a stronger demand for overheat detection of their battery cells. To address this need Murata manufacturing has developed and commercialized “Thermo-String” a tiny high-precision temperature sensing device which uses Chip POSISTOR or a chip NTC thermistor as the detector element.
The newly developed Thermo-String is capable of temperature sensing even in a tight space due to its ultra small sensing device at less than 1.6 x 0.8 mm and coated lead wire with flexible length between 25mm and 150mm. A Chip thermistor which has been used as the detector element enables a lineup with an extensive range of resistance and B-values which is a constant representing the variance in resistance corresponding with the temperature. The production of this device has already begun at 300 thousand units per month with sample pricing of 20 yen per unit.
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[...] it would lengthens battery operation time in mobile devices. The product is targeted to be used in note-PCs, netbooks, MIDs, Mobile phones, Digital still cameras and Portable audio players. The newly chip [...]