Home head-to-head
Ergotron HX Desk Monitor ArmvsHumanscale M2 Pro
Same ballpark on the average, 7.8 and 8.0, and nothing alike on the axes: Humanscale M2 Pro wins Design by 1.5, 9.1 to 7.6.
Ergotron HX Desk Monitor Arm
Ergotron
7.8
Holds a 42-pound ultrawide steady. Anything under 20 pounds is too light for it.
Price and availability change constantly, so we don't quote them here — the link opens current listings on Amazon.
Humanscale M2 Pro
Humanscale
8.0
The slimmest arm here, with a fifteen-year warranty and the highest asking price by some distance.
Price and availability change constantly, so we don't quote them here — the link opens current listings on Amazon.
Where they diverge
The widest gap is Design, Humanscale M2 Pro ahead 9.1 to 7.6. They come closest on Durability, 9.2 to 9.0. Left of center is Ergotron HX Desk Monitor Arm, right is Humanscale M2 Pro.
Which one to pick
Take the Ergotron HX Desk Monitor Arm
Leads on Value and Durability.
- A 49-inch super-ultrawide or a heavy 4K monitor that other arms cannot lift
- Desks where the monitor rarely moves once positioned
Take the Humanscale M2 Pro
Leads on Ease of use and Design.
- A desk that is seen, like a reception area or a home office on video calls
- You want the longest warranty on the page
What each one gets wrong
Ergotron HX Desk Monitor Arm
- Your screen weighs under 20 pounds, because the arm will not hold it down
- You want a lot of height range for switching between sitting and standing
- Thin or hollow-core desktops, which a heavy arm and screen can crack
Humanscale M2 Pro
- You are buying on value; several arms here hold the same screen for far less
- You see an M2.1 listed and assume it takes 22 pounds, since the old rating is 15.5
Specs, side by side
| Spec | Ergotron HX Desk Monitor Arm | Humanscale M2 Pro |
|---|---|---|
| Monitor weight | 20 to 42 lb | 5 to 22 lb |
| Screen size | Up to 49 in, depending on weight | — |
| VESA | 75, 100, 200 x 100, 200 x 200 | — |
| Mechanism | Constant Force (mechanical spring) | Weight-compensating spring (mechanical) |
| Lift / reach | 11.5 in lift, 23.6 in extension | — |
| Tilt | +70° / -5° | — |
| Mounting | Clamp for 0.4 to 2.4 in desks, or grommet | Two-piece clamp or bolt-through |
| Warranty | 10 years | 15 years |
| Height adjustment | — | Up to 12 in |
| Replaces | — | M2.1 (rated 5 to 15.5 lb) |
Rankings they both appear in
Questions
- Only 0.2 separates them. What breaks the tie?
- Design does, at 9.1 against 7.6. That axis covers build quality and how it sits in a room. Ergotron HX Desk Monitor Arm takes Value and Durability; Humanscale M2 Pro takes Ease of use and Design. Neither leads on more axes than the other, so it comes down to which of those you care about.
- Why are the totals this close?
- The total is the plain average of the 4 Home axes, so opposite results cancel. Ergotron HX Desk Monitor Arm averages 7.8 and Humanscale M2 Pro averages 8.0, a gap of 0.2, while the individual axes run as far apart as 1.5.
- Which one ranks higher in "Monitor arms: the weight rating decides before the brand"?
- Humanscale M2 Pro sits at #2 in "Monitor arms: the weight rating decides before the brand", Ergotron HX Desk Monitor Arm at #3.