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Ergotron HX Desk Monitor ArmvsErgotron LX Pro Desk Monitor Arm
Two Ergotron models that average 7.8 and 8.5. Ergotron LX Pro Desk Monitor Arm takes Ease of use, 8.6 to 7.4.
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.
Ergotron LX Pro Desk Monitor Arm
Ergotron
8.5
The arm cheaper ones copy, rebuilt in 2025 with a lower weight ceiling than the original LX.
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 Ease of use, Ergotron LX Pro Desk Monitor Arm ahead 8.6 to 7.4. They come closest on Durability, 9.2 to 9.0. Left of center is Ergotron HX Desk Monitor Arm, right is Ergotron LX Pro Desk Monitor Arm.
Which one to pick
Take the Ergotron HX Desk Monitor Arm
Leads on 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 Ergotron LX Pro Desk Monitor Arm
Leads on Value, Ease of use and Design.
- A single monitor you move several times a day, between sitting and standing
- You want the arm to outlast the next two monitors
- Deep desks, where 25 inches of reach lets the screen come forward
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
Ergotron LX Pro Desk Monitor Arm
- Your monitor is over 22 pounds, which includes many large ultrawides
- You are replacing an old LX and assumed the same 25-pound rating carries over
Specs, side by side
| Spec | Ergotron HX Desk Monitor Arm | Ergotron LX Pro Desk Monitor Arm |
|---|---|---|
| Monitor weight | 20 to 42 lb | 4 to 22 lb |
| Screen size | Up to 49 in, depending on weight | Up to 34 in |
| VESA | 75, 100, 200 x 100, 200 x 200 | 75 x 75, 100 x 100 |
| Mechanism | Constant Force (mechanical spring) | Constant Force (mechanical spring) |
| Lift / reach | 11.5 in lift, 23.6 in extension | 13 in lift, up to 25 in extension |
| Tilt | +70° / -5° | +70° / -15° |
| Mounting | Clamp for 0.4 to 2.4 in desks, or grommet | Two-piece clamp or grommet |
| Warranty | 10 years | 10 years |
Rankings they both appear in
Questions
- Both are Ergotron. Which one do I want?
- Ergotron LX Pro Desk Monitor Arm leads on Value, Ease of use and Design. If Durability matters more to you, take the Ergotron HX Desk Monitor Arm instead. Ergotron HX Desk Monitor Arm averages 7.8 and Ergotron LX Pro Desk Monitor Arm averages 8.5, over the 4 axes Home is scored on.
- Where do the two Ergotron models actually differ?
- Ease of use is the widest gap, Ergotron LX Pro Desk Monitor Arm ahead 8.6 to 7.4. Every axis lands somewhere different, so the profile shapes differ as much as the totals.
- Which one ranks higher in "Monitor arms: the weight rating decides before the brand"?
- Ergotron LX Pro Desk Monitor Arm sits at #1 in "Monitor arms: the weight rating decides before the brand", Ergotron HX Desk Monitor Arm at #3.