Using proven TMR (Tunneling Magnetoresistance) technology, the high-performance RedRock® RR112 analog TMR magnetic sensor series, the RR122 digital sensor series, and the RR132 digital switch series have numerous technologically-advanced applications in multiple markets and are ultra low power magnetic sensors. Offering both high sensitivity, ultra-miniature package size, ultra low power consumption and a highly-competitive price, the TMR Magnetic Sensor devices are ideally suited to the demands of next generation medical, automotive, instrumentation, consumer and industrial applications; and they are quickly becoming a popular alternative to Hall Effect and Reed Switch. The tiny solid state TMR Magnetic Sensors offer high magnetic sensitivity with high hysteresis, EMF resistance, a small package size, and ultra low power consumption to conserve battery power on critical devices.


Coto Technology is the worldwide leader of small signal switching products sold into the Automatic Test Equipment, Data Acquisition, Instrumentation, Process Control, Telecommunications, Medical and Security markets. Our Classic line of Relays & Switches contains a wide range of form and function. And all of our products are 100% tested!


CotoMOS® relays are a reliable and readily-available switching solution by Coto Technology. Utilizing highly-reliable, custom-designed MOSFET technology, CotoMOS® relays provide a high-performance, solid state solution for applications requiring low input power and virtually unlimited life. Ideally suited to the needs of industrial controls, security, metering, instrumentation and automatic test equipment, CotoMOS® relays are available in Form A, Form B, and Form A+B (Form C) form factors to service a wide range of switching requirements.


Located in Mexicali, Mexico, Coto’s manufacturing facility offers a full range of comprehensive services. Provisions include physical resources, engineering, procurement, and supply chain management - as well as production planning and product cell manufacturing using highly-automated, precision machinery in conjunction with complex hand-assembly processing. Finishing services include final product testing, marking, packaging , inventorying and shipping.

News & Events

Coto Adds New Distributor in Israel

Coto Technology welcomes its newest distributor, Telsys Ltd   Read More!

New RedRock Users Guide Helps with TMR Sensor Selection

Coto Technology has produced and posted a new Quick Reference Guide for its complete line of ultra low power RedRock® TMR Magnetic Sensor products.   Read More!

RedRock® RR122-1B12-511 / 512 TMR Digital Magnetic Sensor Released

The ultra low power RR122-1B12 TMR magnetic sensor features an operating frequency of 2 Hz, a voltage supply range of +1.7V to +5.5V and an extremely strong magnetic sensitivity (30 G or 3 mT) in an ultra-miniature package size at a highly-competitive price.  Read More!

RedRock® RR122-1A22-511 / 512 TMR Digital Magnetic Sensor Released

Coto Technology’s ultra low power RedRock® RR122-1A22-511 / 512 Series TMR Digital Magnetic Sensor offers the highest sensitivity and lowest power consumption available in an active magnetic sensor. Read More!

RedRock® TMR Sensors Featured on MikroE’s new Click Board

Coto has collaborated with MikroE in their new TMR mix-sens Click Board to target product development engineers who currently use or might use the MikroE ecosystem to speed prototype and development of products using Coto RedRock® TMR magnetic sensors.  Read More!

Covid-19 Update

Although we continue to manufacture at nearly full capacity, production lead times have been extended due to raw material supply issues that are being experienced throughout the world.  Meanwhile, we remain vigilant with regard to the on-going Coronavirus; we continue to maintain strict hygiene standards throughout our facilities and conduct scheduled health checks before and during workdays to ensure the safety and well-being of our employees. However, despite all advanced safety measures, adherence to strict guidelines and our “essential business” status, manufacturing sustainability is always a concern as the virus continues to surge worldwide and federal lockdowns become possibilities. We are hopeful that better times are ahead in the near future.

Coto Technology