TMR vs Hall Effect sensors in keyboards

After a year full of Hall Effect keyboards there are now TMR keyboards popping up. But how’s that different than Hall effect keyboards with magnetic switches?

TMR is basically a slight upgrade from the Hall effect technology. In the case of the first TMR keyboard I’ve used – Monsgeek FUN60 Ultra the switches are just regular hall effect switches. But the PCB of the keyboard uses TMR magnetic sensors instead of Hall effect magnetic sensors.

And what’s the difference between TMR and Hall effect sensor in the context of mechanical keyboards?

Feature	Hall Effect Sensors	TMR Sensors
Sensing Mechanism	Detects changes in magnetic field perpendicular to the sensor	Detects changes in magnetic field in-plane with the sensor
Sensitivity	Lower	Significantly Higher (approx. 1000x)
Power Consumption	Higher: 5-10mA	Lower: 0.001~0.01mA
Accuracy	Lower	Slightly higher
Size	Generally larger	Potentially smaller
Cost	Lower	Higher
Thermal Stability	Medium	High
Consistency	Potentially less consistent part-to-part performance	Potentially more consistent part-to-part performance

The first released keyboard with TMR sensors seems to be the Monsgeek FUN60 Ultra (there are wired and wireless versions).

There are now also a few keyboards released with inductive switches such as Ducky One X and Epomaker Magcore 87. This is yet another technology.