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The TMR sensors are a brand-new class of magnetic sensors that make use of a TMR element, a very sensitive HDD head replicating component. The magnetoresistance effect, which describes a change in resistance brought on by the application of an external magnetic field, serves as the foundation for the reading components of HDD heads.
A very thin, nanometer-thick nonmagnetic insulating layer sandwiched between two ferromagnetic layers makes up a TMR sensor element. Through the insulating layer, electrons can tunnel between two ferromagnetic layers. This is a manifestation of quantum mechanics.
Resistance goes down when the two ferromagnetic materials’ magnetization directions are parallel and goes up when they are antiparallel.
The Global high sensitivity TMR sensors market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
TMR1208/TMR1308 are ultra-high sensitivity TMR magnetic switch sensors from MultiDimension Technology Co., Ltd. (MDT), a provider of magnetic sensors with a focus on Tunneling Magnetoresistive sensors (TMR sensors).
They are the perfect options for battery-powered sensor applications that demand high-precision measurement, exact performance uniformity, and exceptional temperature stability because they have ultra-high sensitivity with 5 Gauss (0.5mT) switching points and ultra-low power at 1.5microAmperes in high-speed operation.
Wireless door access switches, intelligent medical gadgets like smart tablets, and portable drug delivery systems are examples of typical applications.
They make it possible to measure precisely while using a smaller magnet or a greater sensing distance, which lowers the cost of the entire system while improving usability. They are additions to the expanding TMR12xx/TMR13xx magnetic switch family from MDT, which is made for a range of commercial and residential applications.
TDK’s TMR sensors are a novel type of magnetic sensors that make use of a TMR element, which is a highly sensitive HDD head reproducing element. The magnetoresistance effect, which describes a change in resistance caused by an external magnetic field, serves as the foundation for the reading elements of HDD heads.
They have developed into AMR (anisotropic magnetoresistance effect) elements, GMR (giant magnetoresistance effect), and TMR (tunnel magnetoresistance effect) elements since the 1980s, promoting significant increases in HDD recording density.
The advancement of sensing technologies is significantly enhancing automobile fuel efficiency. Crank angle sensors or cam angle sensors are used by an engine’s electronic control unit (ECU) to determine the most effective timing and quantity of fuel injection.
Despite the fact that there are a variety of crank angle and cam angle sensors, non-contact magnetic sensors are the most common due to their resistance to dust and wear. A magnetic material-made toothed gear pulsar (pulsar rotor) is attached to a crankshaft or cam shaft, and a contactless bias magnet-applied magnetic field is applied to a magnetic sensor.
The projections and recesses of the gear teeth cause alternating changes in the density of the magnet’s magnetic flux as the engine starts and the gear pulsar rotates. The magnetic sensor takes this as a pulse signal and uses the number of pulses per unit time to determine the rotation speed. These sensors are also referred to as gear tooth sensors due to this mechanism.
When used as wheel velocity sensors for ABS (anti-lock braking) systems, TDK TMR sensors outperform sensors with a hall element in terms of sensitivity and output. In addition, it is likely that they will be used as current sensors that control battery charging and discharge to conserve energy.
In industries, automotive electronics, and consumer electronics, there has been an increase in demand for magnetic sensors in recent years. When it comes to sensors, some people hold the belief that, even if some of the elements’ characteristics are subpar, they can be compensated for by how they are used (software).
However, good conversion efficiency is still necessary because a sensor is a type of transducer. In addition, it is anticipated that automotive sensors will require approximately twice the detection accuracy of conventional sensors in order to achieve safer and more comfortable driving.
To meet the stringent and difficult requirements of the market, TDK TMR sensors are novel products with high output, high accuracy, low temperature drift, and low aging deterioration. They will be able to easily meet future strict accuracy requirements thanks to these characteristics. In order to cater to a wide range of applications, TDK is working on further product line expansion.
