Magnetic field sensors have been widely used in various industries for current sensing, position detection, and more.
In the keyboard switch market, HE(Hall Effect) sensors have long been a popular choice — especially among gamers and keyboard enthusiasts — for their high sensitivity and durability.
However, the emergence of TMR (Tunnel Magnetoresistance) sensors has elevated the public perception of magnetic switch keyboards to a new level, offering even greater precision and responsiveness.
So, what exactly sets HE and TMR apart?
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Working Principle
HE (Hall Effect) switches operate on a non-contact mechanism, unlike traditional metal contact switches. When a key is pressed, a magnet attached to the key stem moves closer to a Hall sensor positioned beneath it. This change in proximity strengthens the magnetic field detected by the sensor, which in turn generates a corresponding voltage signal that is sent to the controller to register the keypress.
TMR (Tunnel Magnetoresistance) sensors rely on the principles of ferromagnetism and quantum tunneling to detect input signals and transmit them to the controller.
Structurally, a TMR sensor resembles a sandwich: two ferromagnetic layers are separated by an ultra-thin insulating barrier. When a key is pressed, the relative alignment and distance between the magnetic layers change. As the insulating layer becomes thin enough, electrons are able to quantum tunnel through it, resulting in a tunnel current. The resistance of this current depends on the magnetic alignment of the two layers — which is then interpreted as a keystroke signal.
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Comparison
|
Category |
HE (Hall Effect) |
TMR (Tunnel Magnetoresistance) |
|
Performance |
Susceptible to temperature and environmental conditions |
High consistency across varying conditions |
|
Sensitivity |
Requires stronger magnetic fields |
Detects weak magnetic fields with high sensitivity |
|
Accuracy |
Lower precision in detecting fine key movements |
Higher precision; ideal for analog input and rapid trigger features |
|
Power Consumption |
Higher, particularly in continuous sensing |
Low power consumption; ideal for energy-efficient and battery-powered devices |
|
Cost |
Lower cost due to mature technology and simpler manufacturing process |
Higher cost due to complex processes, material purity, and limited production scale |
High Precision and Accuracy:
TMR sensors are sensitive to magnetic fields, allowing them to detect even the slightest changes in magnetic force. This ensures that every keystroke is highly accurate, providing an exceptional level of responsiveness and consistency in key actuation.
usage: Competitive gaming where fast and accurate inputs are critical.
RT (Rapid Trigger):
TMR technology delivers ultra-precise and adjustable rapid trigger functionality. The magnetic switch keyboard, Womier SK75 TMR, offering a 0.125ms ultra-low latency, provides a significant advantage for gamers who require fast and accurate responses during intense gameplay.
usage: Keyboard enthusiasts who want full control over key actuation distances.
Long-Lasting Performance:
TMR switches offer superior durability compared to HE switches. Each keystroke consumes significantly less energy, resulting in reduced wear and extended switch lifespan.
usage: Keyboard high-demanders who require long-lasting, smooth typing performance.
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Conclusion
Both HE and TMR magnetic switch keyboards play an important role in today’s keyboard market.
If you’re a keyboard enthusiast or competitive gamer seeking ultra-fast response and high-precision control, TMR keyboards—Womier SK75 TMR—offer a next-level experience.
For users seeking excellent tactile feedback on a budget, HE keyboards—Womier M68 HE—deliver outstanding value with smooth performance and proven reliability.
