News & Events

New TMR Analog Magnetic Sensor Product Released
Coto Technology’s RedRock™ RR111 Series TMR Analog Magnetic Sensors offer high sensitivity and
an even smaller package size than previous TMR analog technologies.

Coto Technology has announced the release of its new RedRock™ RR111 Series wafer-based TMR (Tunneling Magnetoresistance) analog sensors.  Offering extremely strong magnetic sensitivity in an ultra-miniature package size at a highly-competitive price, the RR111 analog sensor is ideally suited for liquid level sensing, precision linear proximity detection, linear positioners and encoders and anti-tampering applications. Available in both a tiny 1.4 x 1.4 x .45mm LGA-4 device package and an industry standard SOT-23-3 package, the RedRock™ RR111 fits well into space-constrained applications such as insulin management, ingestibles, and implantable devices that all need to be hermetically sealed.  With its high sensitivity, the RR111 operates continuously, changing its output voltage based on the applied magnetic field strength. The highly linear response of the RR111 provides reliable functionality with a wide range of magnets across wide activation distances.

Price & Delivery

The Coto Technology RedRock™ RR111-1DC2-331 and RR111-1DC2-332 TMR analog magnetic sensor are immediately available through Coto’s distributors at a single unit price under $1.00 (with high volume application pricing below $0.25).

More Information

Coto’s RedRock line of TMR magnetic sensors and switches also includes the RR121 and RR120 Series digital sensors and the RR130 Series digital switch, each catering to the needs of advanced magnetic sensing applications.  All offer high sensitivity and ultra-low power consumption in small and ultra-miniature device packaging.

For information and videos on Coto Technology’s RedRock™ line of sensor & switch products, please visit the Videos Tab on Coto’s Website Resource Library Page or email    Additionally, Coto’s engineers (at ) are readily available to answer your questions about how RedRock™ TMR products can work with your application.

Coto Technology Awarded “Best of Show” (Silver) at Sensors Midwest 2017
New RedRock TMR Magnetic Sensors capture attention of Electronic Engineers/Designers

Rosemont, IL – Coto Technology has been awarded Sensors Midwest’s Best of Show “Silver” award for its newly-released RedRock TMR RR121 Magnetic Sensor.  Seeking to replace aging magnetic sensor technology, the RR121 represents a huge breakthrough for design engineers seeking the lowest possible power consumption and highest sensitivity in an ultra-miniature package.  Released on October 3, the RR121 magnetic sensor series will address new generation requirements in multiple markets including medical, industrial, security, white goods and automotive.  Design engineers using older technology switches and sensors will no longer have to suffer the detractions in power, size, sensitivity and cost – and will now have greater flexibility and reliability as well as cost efficiency.  The RR121 offers the lowest power, highest sensitivity in the smallest package available in the world!

The RR121 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.  Specific medical applications include portable and battery-powered medical devices like ingestibles and implantables that are hermetically sealed and need a way to be triggered without compromising their protective encasement.  Many of these devices, such as capsule endoscopes, remain in “standby mode” on a doctor’s shelf for up to 18 months – so battery power conservation is critical.  The small size of these types of medical devices and the need for hermetic seals to survive the gastrointestinal tract necessitates a tiny, contactless means for “waking up” the microprocessor from outside of the body. Magnetic sensors are also used in some hearing aids to provide a means of mode

switching, whether it be for turning the device on or off, performing diagnostic checks, or tuning the hearing aid’s response when a telephone speaker is brought near the ear.  The RR121 is ideal for consumer appliances requiring accurate liquid level measurement, such as dishwashers, washing machines, coffeemakers, and refrigerators. The RR121 can replace historically-used large reed switches to provide a more accurate measure of the liquid level, saving energy, water usage, and costs for consumers while improving sustainability for the environment. It can also be used to measure flow of both liquids and gases in these same applications to ensure that the devices are operating accurately. That flow measurement can also be utilized 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.  With regard to utility meters, the RR121 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 aging infrastructure in the US and overseas.  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 doors jams and window sills to monitor their opening and closing and prevent unauthorized 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.


The Coto Technology RedRock RR121 TMR magnetic sensor is immediately available through Coto’s distributors at a single unit price of $1.00 (with high volume application pricing well below $0.50).


For more information or questions on RedRock™ as well as the rest of Coto Technology’s complete line of sensor & switch products, please visit or email .   For questions about how to convert your bare glass reed switch designs to higher reliability, more cost effective TMR solutions, please contact

Coto Adds New Partners in France and Israel

Coto welcomes to iSC-Distrel and DSL Components to our global channel partner network.  iSC-Distrel serves as a Coto Technology product Distributor and https://cotorelay Agent in France.  Being firmly established in the French market and well known as a highly service-oriented technical distributor, iSC-Distrell is a welcome addition as Coto’s local channel partner in France .
In addition, DSL Components (and in particular Mr. David Lipener), now represents Coto in the Israel market place.  Adding a local representative with more than 30 years of experience within the electronics industry allows us to enhance our service – as well as market reach – in Israel.  Please join us in welcoming DSL Components to our global channel network.

Ultraminiature TMR-Based RedRock Switches / Sensors Products Debut at Electronica Germany, 2016

Exhibiting in Hall B1, Booth #525 at Electronica Germany, Coto Technology Inc. will be showcasing its newly-released RedRock™ RR110 analog sensor, RR120 digital sensor, and RR130 digital switch.  With a standard SOT-23 package, these devices are half of the size of Coto’s CT05 molded reed switch. The high-performance RedRock RR110, RR120, and RR130 have numerous technologically-advanced applications in multiple markets.   Offering both high sensitivity and small package size, the devices are ideally suited to the demands of next generation medical, automotive, instrumentation, and industrial applications. The tiny sensors offers high magnetic sensitivity with high hysteresis, EMF resistance, and a small package size, all while consuming very little power.

The RR110, RR120, and RR130 meet the strict power constraints of battery-operated portable devices and electronics, suiting the needs of emerging medical device applications including ingestibles and implantables. The small package size addresses the needs of current medical applications including portable insulin pumps, capsule endoscopes, next generation hearing aids, insulin pens, medical wearables, and other small, battery-powered medical electronic devices. Other applications include consumer smart wearables, high precision fluid level sensing, security and anti-tampering, “wake up” mode switching on a microprocessor, and more.


The Coto Technology RedRock RR110, RR120, and RR130 TMR magnetic sensors and switches are immediately available through Coto’s distributors at a single unit price of $2.95 (with high volume application pricing under $0.99). An evaluation kit (RR110-EK) is also available through Coto’s distributors. The kit contains a motherboard, both an RR110 and RR130 mounted at opposite ends, a magnet, and other accessories along with documentation.


For more information on RedRock™ sensors and switches as well as other Coto Technology products, please visit or email directly.
See Coto Technology at Electronica Germany, Hall B1, Booth #525  (Nov. 8-11).

Notice! Some Mercury (HG) Products will Soon Be Obsolete!

Obsolete HG Parts List

Some parts within these HG series will soon be obsolete. Click on this image to open a .pdf file showing which products will remain active & which will soon be obsolete

March 14, 2016

Re: Notification of Discontinuance of Certain Mercury Relays

In 2007 Coto acquired the assets of SRC Devices.  As part of the acquisition there were over 500 different Mercury parts that were in the portfolio.  Since then we have been utilizing components manufactured by a number of former SRC Vendors, many of which are no longer supporting components, either due to tool wear or a number of other factors.  In addition, there are several parts that have not had any requirements in the ensuing 8 year period.  At this point, Coto does not intend to invest or support selected parts within the following part families, which will be considered obsolete effective immediately. The list of specific parts is too large to include in this notification, so we have provided a link to a PDF file listing all of Coto’s Mercury products – both active and obsolete.   If you would like a sortable, .xls version of this file, you can request one from

This action is specific to the listed part numbers designated as “obsolete.” All “active” parts that will continue to be supported are also included in the list to ensure clear direction for parts available for general sale.

As there is a considerable installed base for these discontinued parts we realize that some of you may want to request LTB’s (Last Time Buys).  Please contact your Account Manager for review within the next 30 days.  Please understand that if we are able to support LTB parts then there will be minimum lot sizes and setup costs, assuming components can be made available.



New 2362 SMD, 2 Form C Relay Offers Long Life / Reliability

Coto Technology has a developed a surface mountable 2 Form C reed relay designed for high reliability and long life. Coto Technology 2362 2-Form C Relay

Coto Technology, Inc. has announced the development and release of the new Coto 2362 Series surface mountable 2 Form C relay. The 2362, which is a surface mount version of Coto’s popular 2342 2-Form C pico relay, offers a proven reed design with longer life than competing 2-Form C EMR products. The 2362 is ideally suited to the needs of automated test, instrumentation and telecommunication applications to increase system reliability and life where high density is required.

The 2362 has a lead time of 10-12 weeks. A detailed datasheet on the new 2362 Series is available on Coto’s website.



Coto Technology has just released the 9913 Series ultra-miniature surface mount reed relay. The 9913 has the smallest footprint available in the market.Coto Technology 9913 Series Ultra-Miniature Reed Relay

Coto Technology, Inc. has announced the release of the 9913 ultra-miniature surface mount reed relay. With a footprint of only 0.054 in2, the 9913 has the smallest footprint available in the market today. The 9913 Series is ideally suited to the needs of the Automated Test Equipment, Instrumentation, and Telecommunications designer.

The Coto Technology 9913 Series surface mount reed relay is available in a compact J-Bend SMD package and includes a standard external magnetic shield for reduced magnetic interaction and to maximize density where high pin count and high performance is required.   As with all Coto relays, the 9913 Series is 100% tested. In addition to having high-reliability, hermetically-sealed contacts for long life, the 9913 is RoHS compliant.

The Coto Technology 9913 Series is available for immediate delivery through Coto’s distribution partners; high-volume lead times range 12 to 14 weeks. A detailed datasheet for the 9913 Series with mechanical drawings and electrical specifications is available by download on Coto’s website.

Technical & Application Support

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