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Omron launches sensitive Air Quality Sensor for pollution control and monitoring
Omron Electronic Components Europe has launched a new Air Quality Sensor module, offering four times greater sensitivity compared with other LED based dust sensors on the market.

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Perfect fit of PTC thermistors for LED driver circuits

  EPCOS has developed a new series of PTC thermistors in the EIA 0603 case size specifically for LED driver circuits.

Compared to conventional PTC limit temperature sensors they offer two decisive benefits: their rated resistance has a narrow tolerance of ±15 percent and their R/T characteristic is more exactly specified.

This facilitates the design of LED driver circuits and at the same time enables the thermal management of LEDs to be improved. Thus, LEDs can be operated with almost the maximal permissible temperature-dependent current without having to use a driver IC with integrated temperature measurement.

The new B5960* series comprises four types with resistances of 110 Ω and 470 Ω and various R/T characteristics. The thermistors are designed for a maximum operating voltage of 32 V DC.

Further information on this topic can be found at

For more information on the full range of EPCOS products available from Anglia please call +44 (0)1945 474747 or email

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This news article was originally published in December 2009.

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