Hall Effect vs TMR vs Potentiometer: Which Sticks Drift

Why does a pad that costs more than a game drift after a year while some sub-fifty-dollar pads shrug off three? Mostly it comes down to a component the size of a fingernail and how it measures the angle of the stick. There are three ways to do it in production controllers today. One of them wears out by design.

What a stick sensor actually measures

Under the thumb cap sits a gimbal: two pivots at right angles, each turning a small shaft as you tilt. The sensor turns each shaft's angle into a number, and how it does that decides whether the stick wears, how much current it sips, how it behaves next to a magnet, and what a replacement costs.

Potentiometer: a wiper on a carbon track

The incumbent. Each shaft turns a wiper that drags along a curved resistive track; the resistance between wiper and track end changes with angle, the controller reads it as a voltage, done. It is cheap, it has decades of supply chain behind it, and it is what you will find in nearly every first-party controller. iFixit's look inside the Alps RKJXV module series finds that family in every PlayStation pad since the PS3, every Xbox pad since the One, and the Switch Pro controller. When iFixit documents the DualSense stick swap, the part being unsoldered is a module with "two potentiometers" inside.

The weakness is in the word "drags". The RKJXV datasheet gives the potentiometer two million direction cycles, but those cycles do not land evenly. The stick rests at centre, so the wiper polishes one short stretch of carbon every time it returns. That stretch thins first, contact there turns noisy, and the voltage the controller reads at rest creeps away from the midpoint. That creep is the stick drift most people mean, and it is the one failure mode on this page that gets worse the more you play. The stick drift page explains how we grade it; the short version is that past about 10 % offset no calibration holds.

A potentiometer stick can also drift for reasons that have nothing to do with the track (a tired spring, debris, a stretched housing), and those apply to the next two types as well.

Hall effect: a magnet over a chip

Replace the track with a small magnet on the shaft and a Hall sensor beneath it. As the magnet swings, the field through the chip changes and the chip outputs a voltage proportional to it. Nothing touches, so there is no track to wear, and that single fact is the whole sales pitch. Reviews of Hall-stick pads tend to report no measurable drift after extended use, and a healthy Hall stick should sit in our under-2 % band and stay there.

The trade-offs are real but smaller than the marketing on either side suggests.

Power. A linear Hall IC is a tiny powered circuit, and distributor spec listings for common parts put supply current in the single-digit milliamp range: about 9 mA for the Allegro A1324 family, roughly 4 to 6.5 mA for Melexis MLX90215 variants depending on the suffix. Two sticks, four sensors, always on. A potentiometer draws essentially nothing by comparison. On a wired pad nobody cares; on a wireless pad it is a few percent of battery life, which is why the current figure on a datasheet matters more than it looks.

Magnetic interference. The chip reads whatever field reaches it. Controller designs shield the sensor and keep stray magnets away, and the published joystick patents describe exactly that, a metal cap over the module to keep external fields out and the module's own field in. The best-known case where this constraint bit is the Switch 2: Nintendo confirmed to Nintendo Life that the Joy-Con 2 sticks are not Hall effect, and Lumafield's CT scan of the Joy-Con 2 points to the strong mounting magnets in the new rail as the reason Hall sensing would have been a poor fit there. For a normal gamepad sitting on a desk this is a non-issue; for a controller that clips to something magnetic, it is a design decision.

Centring. A Hall stick still has a spring and a housing. SCUF's explainer on drift makes the point bluntly: magnetic sensors do not fix centring problems on their own, because the return-to-centre is mechanical. A Hall stick with a soft spring reads a small offset honestly, and that offset is what you will see in a drift test. The difference from a potentiometer is that it does not compound.

TMR: resistance through a tunnel

Tunnel magnetoresistance is the newer magnetic option. The sensor is a stack of ultra-thin magnetic layers with an insulating film between them; electrons tunnel through the film, and how easily they do so depends on the angle of the external field. So where a Hall chip outputs a voltage that has to be amplified, a TMR element changes its resistance directly and by a large amount. Sensor makers pitch this as higher output signal, lower temperature drift and lower power, and the industrial parts bear it out in a general way: TechRadar's comparison table puts Hall at "usually around 1–10 mA" against TMR in the microamp to sub-milliamp range, and distributor listings for Infineon's TLE5501 TMR angle sensor show 1.67 to 2.5 mA depending on variant. That is less than the Hall parts above, though not the thousand-fold gap the keyboard world sometimes quotes; the microamp figures belong to TMR switches, not angle sensors. Treat any specific number as part-dependent and ask the controller maker, not the sensor type.

Price and maturity. TMR costs more per element and, as Keychron notes from the keyboard side, demands tighter process control to keep units consistent; Hall has the mature assembly lines and the known failure data. TMR sticks have only been in gamepads since roughly 2024, so nobody has ten years of field returns yet. That is not a knock, it is a gap.

Precision claims. Makers advertise TMR sticks as more precise than Hall, and the signal-to-noise is better on paper. Whether you can feel it through a 12-bit converter and a game's deadzone is something to measure rather than assert; the raw-axes view in the gamepad tester and the polling rate test are the honest tools for that.

Who uses what, by manufacturer spec

Read from the makers' own product and support pages on 30 October 2026. Where we could not find an official page we say so rather than repeat a retailer.

Controller	Stick sensor	Where it says so
Sony DualSense, DualSense Edge	Potentiometer	iFixit's DualSense guide unsolders a module with two potentiometers; Sony sells the Edge module as a swap part but does not state the sensor type
Xbox Wireless Controller (Series X|S), Elite Series 2	Potentiometer	iFixit's Alps RKJXV teardown, which covers Xbox pads from the One onward
Nintendo Joy-Con 2	Not Hall effect; teardowns report potentiometers	Nintendo of America to Nintendo Life; Lumafield CT analysis
GameSir Cyclone 2, G7 Pro	TMR ("Mag-Res TMR Sticks"), Hall effect triggers	gamesir.com product pages
8BitDo Ultimate 2 Wireless	TMR ("Joysticks: TMR"), Hall effect triggers	8bitdo.com product page
Razer Wolverine V3 Pro 8K PC	TMR	razer.com (Middle East page)
Razer Wolverine V3 Pro (Xbox)	Hall effect	razer.com US page

Two names people ask about are missing on purpose. GuliKit's KK3 Max and Flydigi's Vader 4 Pro are described everywhere as Hall effect, but neither maker's site gave us a readable product page when we checked, so they stay "widely reported" until we can quote the manufacturer. Steam Deck likewise: Valve has not published the sensor type, and we will not guess.

The pattern: in 2026 the three platform holders are still on potentiometers, and the magnetic sticks live in third-party pads and aftermarket modules. iFixit's parts list for the DualSense swap offers a TMR module next to the stock one for exactly that reason.

What this means for a replacement module

If you are already desoldering a worn module (the PS5 and Xbox pages describe what that involves), the sensor choice is yours. A potentiometer replacement is cheapest and restarts the same wear clock. A Hall module removes track wear at the cost of a few milliamps and a sensitivity to strong magnets you are unlikely to meet on a desk. A TMR module does the same with less current and a newer supply chain. Whichever you fit, the installed module has to read full range on both axes and sit under 2 % at rest, and that is a ten-second check in the stick drift test rather than something to take from the listing.

Questions people ask

Do Hall effect controllers drift? Not from wear; there is no track. They can show a small, stable offset from the spring or housing, which a drift test reads as a percent or two and which does not grow.

Hall effect vs TMR: which is better? Both remove the wear mechanism. TMR draws less power and has a stronger signal on paper; Hall is cheaper and has a longer track record in controllers. For most players the difference is smaller than the gap between either and a worn potentiometer.

How long do Hall effect joysticks last? No controller maker publishes a cycle rating the way Alps does for its potentiometer, so there is no honest number to give. The failure modes that remain (spring, housing, cap) are mechanical and shared with every stick type.

Can I calibrate a Hall effect or TMR stick? Yes, same as any other; see the calibration guide.

Does the PS5 or Xbox controller have Hall effect sticks? No. Both platform holders' current pads use potentiometer modules, per the teardowns above. Magnetic sticks on those platforms come from third-party pads or from an aftermarket module.