Analogue, Mixed Signal, LSI


TMR magnetic sensor

15 November 2017 Analogue, Mixed Signal, LSI

Seeking to replace ageing magnetic sensor technology, RedRock’s RR121 is targeted at design engineers seeking the lowest power consumption and highest sensitivity in an ultra-miniature package.

The sensor, which recently received the silver award at Sensors Midwest’s best-of-show awards, is ideal for applications including medical, industrial, consumer, automotive, security and energy industries where very low average current consumption, high sensitivity and a small package size are required.

The RR121 is ideal for consumer appliances requiring accurate liquid level measurement, such as dishwashers, washing machines, coffee-makers and refrigerators. It can replace historically-used large reed switches to provide a more accurate measure of the liquid level. That flow measurement can also be utilised in residential and commercial water meters to provide accurate reporting of usage, while the unipolar response can act as an additional inherent resistance to tampering.

Based on patented tunnelling magnetoresistance (TMR) technology with CMOS integration, the device can replace reed switches used in the rotational counting common to gas and electric meters, as well as provide a fail-safe activation method for the wireless circuit that facilitates remote measurement as advanced metering systems replace ageing infrastructure.

The RR121 also provides a smaller, more robust solution for residential and commercial security systems. Its small size and high sensitivity allow it to be embedded into door jams and window sills to monitor their opening and closing and prevent unauthorised entry. They can even be integrated with ambient light sensors as part of automated window blinds that adjust to reduce solar heating, saving homes and businesses on HVAC energy costs.

For more information contact Callie Lombard, Hi-Q Electronics, +27 (0)11 894 8083, callie@hi-q.co.za, www.hi-q.co.za



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