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Ergotron HX Desk Monitor ArmvsHUANUO FlowLift Single Monitor Arm (HNSS6)

Same ballpark on the average, 7.8 and 7.7, and nothing alike on the axes: Ergotron HX Desk Monitor Arm wins Durability by 2.2, 9.2 to 7.0.

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.

A gas-spring arm for pocket change that moves smoothly. The cable covers are where it feels cheap.

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 Durability, Ergotron HX Desk Monitor Arm ahead 9.2 to 7.0. They come closest on Ease of use, 7.8 to 7.4. Left of center is Ergotron HX Desk Monitor Arm, right is HUANUO FlowLift Single Monitor Arm (HNSS6).

Ergotron HX Desk Monitor Arm versus HUANUO FlowLift Single Monitor Arm (HNSS6) — axis scores out of 10Horizontal bar chart of editorial scores out of 10 across 4 axes. Bars for Ergotron HX Desk Monitor Arm run left from the axis labels, bars for HUANUO FlowLift Single Monitor Arm (HNSS6) run right. Ergotron HX Desk Monitor Arm: Value 7.0, Durability 9.2, Ease of use 7.4, Design 7.6. HUANUO FlowLift Single Monitor Arm (HNSS6): Value 9.0, Durability 7.0, Ease of use 7.8, Design 7.0.Ergotron HX Desk Monitor Arm (left)HUANUO FlowLift Single Monitor Arm (HNSS6) (right)ValueErgotron HX Desk Monitor Arm — Value 7.0 out of 107.0HUANUO FlowLift Single Monitor Arm (HNSS6) — Value 9.0 out of 109.0DurabilityErgotron HX Desk Monitor Arm — Durability 9.2 out of 109.2HUANUO FlowLift Single Monitor Arm (HNSS6) — Durability 7.0 out of 107.0Ease of useErgotron HX Desk Monitor Arm — Ease of use 7.4 out of 107.4HUANUO FlowLift Single Monitor Arm (HNSS6) — Ease of use 7.8 out of 107.8DesignErgotron HX Desk Monitor Arm — Design 7.6 out of 107.6HUANUO FlowLift Single Monitor Arm (HNSS6) — Design 7.0 out of 107.0Editorial score out of 10 — higher is better

Which one to pick

Take the Ergotron HX Desk Monitor Arm

Leads on Durability and Design.

  • 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 HUANUO FlowLift Single Monitor Arm (HNSS6)

Leads on Value and Ease of use.

  • Your first monitor arm, for a standard 24 to 27 inch screen
  • Thick desktops that some clamps cannot open wide enough for

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

HUANUO FlowLift Single Monitor Arm (HNSS6)

  • Tidy cable routing matters to you
  • You want an arm that will still hold tension a decade from now

Specs, side by side

SpecErgotron HX Desk Monitor ArmHUANUO FlowLift Single Monitor Arm (HNSS6)
Monitor weight20 to 42 lb4.4 to 19.8 lb
Screen sizeUp to 49 in, depending on weight13 to 32 in
VESA75, 100, 200 x 100, 200 x 20075 x 75, 100 x 100
MechanismConstant Force (mechanical spring)Gas spring
Lift / reach11.5 in lift, 23.6 in extension—
Tilt+70° / -5°+80° / -50°
MountingClamp for 0.4 to 2.4 in desks, or grommetC-clamp for 0.59 to 3.54 in desks, or grommet
Warranty10 years—
Lift—Up to 15.75 in
Extras—USB ports on the base

Rankings they both appear in

Questions

Only 0.1 separates them. What breaks the tie?
Durability does, at 9.2 against 7.0. That axis covers failure and fade reports past the one-year mark. Ergotron HX Desk Monitor Arm takes Durability and Design; HUANUO FlowLift Single Monitor Arm (HNSS6) takes Value and Ease of use. 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 HUANUO FlowLift Single Monitor Arm (HNSS6) averages 7.7, a gap of 0.1, while the individual axes run as far apart as 2.2.
Which one ranks higher in "Monitor arms: the weight rating decides before the brand"?
Ergotron HX Desk Monitor Arm sits at #3 in "Monitor arms: the weight rating decides before the brand", HUANUO FlowLift Single Monitor Arm (HNSS6) at #4.