Hall effect vs potentiometer vs TMR sticks: what makers say

Hall effect and TMR are the sensor labels makers print for thumbsticks; potentiometer sticks are the older design the pages mention only by contrast. Stick drift means a stick registering movement you did not make. This guide collects what 8BitDo, GameSir and Razer state, quotes the wording and marks the gaps.

What do makers call these stick types?

Three labels appear across the maker pages cited here. Hall effect is used by 8BitDo on its Ultimate Mobile Gaming Controller ("Hall Effect Joysticks and Triggers"), Ultimate Bluetooth and Pro 2 pads, and by GameSir on the G7 SE ("Anti-drift Hall Effect Sticks"). TMR appears as "TMR joysticks" on 8BitDo's Ultimate 2, Pro 3, Ultimate 3E and Ultimate 3C+ pages, and as "TMR Mag-Res Sticks" on GameSir's G7 Pro. Potentiometer appears on only one of these pages: GameSir's G7 Pro says it "delivers the smooth, linear precision of potentiometer sticks, with the unmatched durability of Hall Effect technology."

That sentence is worth reading closely. The same page names the sticks "TMR Mag-Res Sticks" and gives a 5M cycle durability figure for the joystick module, but it does not explain how a TMR sensor relates to Hall effect technology, nor what it means by potentiometer precision. We can report the claim; we cannot explain the mechanism from the page.

What does each maker claim about drift and durability?

Do all Hall effect sticks make the same promises?

No, and the table shows why. GameSir's G7 SE page connects the sensing method to drift directly: non-contact magnetic sensors, sticks that never wear down in their lifetime, and drift prevented. 8BitDo's Hall and TMR pages talk about precision, durability and power use, and leave drift out. Razer states Hall effect for triggers only and gives no sensor type for its Kishi Ultra thumbsticks. So a "Hall effect" label tells you the sensing method the maker chose; whether the maker promises something about drift is a separate question your page has to answer.

Wording like "never wear down" is also a maker promise, not a result we or anyone else has verified on a given unit, and the GameSir page gives no warranty terms or test method alongside it. The sensible reading is a statement of design intent.

Are triggers and sticks the same thing?

No. Several makers use Hall effect sensing on triggers while saying something different about sticks. The 8BitDo Pro 3 and Ultimate 2 pages list TMR joysticks and Hall effect triggers that switch between a linear mode and a non-linear tactile mode. Razer's Kishi Ultra lists Hall effect triggers and says nothing on sensor type for the sticks. GameSir's G7 Pro pairs TMR sticks with a trigger choice of Hall effect analog or micro switch. When you compare controllers, read the sticks and triggers rows separately.

What else affects how a stick behaves?

The sensor is only one part of the page's story. Makers also state:

• Resolution and sampling: 8BitDo lists a 12-bit ADC sampling chip on its Ultimate 2 and Pro 3 pages, and GameSir lists a 12-bit industrial-grade ADC and 4096-level joystick resolution on the G7 Pro. An ADC converts the sensor reading into a number the controller can send.
• Dead zones: Razer's Kishi Ultra page says you can decide how responsive the thumbsticks feel by adjusting how much they can move before inputs are registered, and the GameSir G7 Pro page says its Nexus app offers stick curve adjustments. Both are software settings, not hardware fixes.
• Stick rings: 8BitDo lists wear-resistant joystick rings and Razer lists anti-friction rings. Neither page ties them to drift.
• Tension: 8BitDo's Ultimate 3C+ lists a "Dual Force Ring" with adjustable tension on a TMR joystick.

What do the stated figures look like side by side?

Only some pages give numbers. This table lists the figures each maker prints about sticks, and "Not stated" where the page is silent.

Read down the durability column and the gap is plain: two GameSir pages print a cycle count, and none of the other pages in the table does. A cycle figure is also a claim about the module, with no test method beside it, so it tells you the maker's target rather than how a given unit will age.

What does 4096 levels mean?

A 12-bit converter can output 2 to the power of 12 values, which is 4,096. That is why GameSir's "4096-level" resolution and its 12-bit ADC line up: the second is the arithmetic behind the first. Across a stick's travel on one axis, the controller can therefore report up to 4,096 distinct positions. The same sum applies to the 12-bit ADC that 8BitDo lists for the Ultimate 2 and Pro 3, though those pages give no resolution figure of their own. Neither maker says how many of those levels you would notice in play, so treat the number as a specification, not a promise about accuracy.

Can you swap or tune the sticks?

Several pages describe changes you make yourself, which is a different matter from the sensor. The Ultimate 3E for Xbox page lists TMR joysticks and an accessory pack with two tall joysticks, one thick-neck joystick and one dome joystick, so the cap shape can change while the sensor stays the same. The Ultimate 3C+ page describes adjustable-tension TMR sticks with a soft-stop silicone ring beneath the joystick. GameSir lists Thumbstick Grip Caps for the G7 SE and Joystick Caps for the G7 Pro, each at $12.99. Those are maker store figures, not UK prices, and we have not checked them against a current listing.

Who should care about the stick sensor?

Reasoning only from the stated pages, three kinds of reader get different value from this topic.

• You want a number to compare: only the GameSir G7 Pro and Tarantula 8K PC pages print a cycle count and resolution. If a spec sheet matters to you, those are the two in this set that give one.
• You want a drift promise in writing: the G7 SE page is the one that links its sensor to drift prevention. The 8BitDo pages cited talk about sensitivity, precision, durability and power use. None of these pages gives warranty terms next to the claim, so check the maker's warranty page separately.
• You play on a phone: the Razer Kishi Ultra page names Hall effect only for the triggers. If the stick sensor type is a deciding factor, the page leaves that row empty.

If you simply want a controller that works with your device, the sensor is rarely the first filter. Connection mode and platform support come before it, and our guide to Bluetooth vs 2.4G vs wired covers those.

What should you check on a product page?

1. Find the sticks row and note the label used: Hall effect, TMR or nothing.
2. Find the triggers row separately, because the label often differs from the sticks.
3. Look for a cycle count, resolution or ADC figure, and note whether the page says what test lies behind it.
4. Look for the words drift or wear. If they are absent, record the row as unstated.
5. Look for warranty terms. Razer's Kishi Ultra page says "up to 1 year of warranty"; the two GameSir G7 pages do not mention a warranty.

How should you use this when choosing?

Start with the rows that your device and play style depend on: which sticks and triggers the controller has, what the maker says about them, and what it leaves out. Treat the sensor label as one row among many. If drift matters to you, look for a page that states drift-related wording and a warranty, and treat a page that is silent as unstated rather than as bad. If battery life matters, 8BitDo says its TMR joysticks consume less power, though its pages give no battery-life comparison between TMR and Hall models.

For the controllers themselves, see best controllers for retro handhelds and phones and the 8BitDo range compared. For connection types, read Bluetooth vs 2.4G vs wired. Our research method explains the sourcing, the controllers hub lists every controller guide, and how to choose a retro handheld covers the device side.

Related guides

• Mobile controllers: clip-on vs Bluetooth pads, as makers describe them