Quick answer: a monitor arm (also called a monitor mount) replaces your monitor's factory stand with an adjustable gas-spring arm that clamps to the desk. To choose one, check three numbers: your screen size (inches), its weight (kg), and its VESA pattern (75×75 or 100×100 mm). If your monitor is 17"–32" and weighs 2–9 kg, an entry arm like the ERGONOZ Core Single (฿1,290) already covers it.
Why use a monitor arm at all?
The stand that comes in the box holds your screen at one fixed height — usually too low, which pushes your neck forward hour after hour. An arm gives you:
- Eye-level positioning — the top of the screen should sit at, or slightly below, eye height. This is the single biggest ergonomic win.
- A clear desk — the arm lifts the base footprint off your work surface entirely.
- Full motion — tilt, swivel, rotate to portrait, push the screen away when you want the desk back.
- Cable management — routed inside the arm instead of dangling behind the desk.
The three numbers that decide everything
1. Screen size and weight
Every arm is rated for a size range and a weight range per screen. Weight matters more than inches: a gas-spring arm that is under-loaded will drift up, and one that is over-loaded will sag. Find your monitor's weight without the stand in its spec sheet, and pick an arm whose range brackets it comfortably.
2. VESA pattern
Flip your monitor around: the four screw holes on the back are the VESA mount, either 75×75 mm or 100×100 mm on nearly all desk monitors. Every ERGONOZ arm supports both. If you see no holes, your monitor may need a VESA adapter bracket.
3. Desk mounting
Arms attach with a C-clamp (grips the desk edge, no drilling) or a grommet mount (bolts through a cable hole). Both are included with ERGONOZ arms. Check your desk edge thickness and make sure the rear edge is accessible.
ERGONOZ arms compared
| Model | Screens | Size / weight per screen | VESA | Warranty | Price |
|---|---|---|---|---|---|
| Core Single | 1 | 17"–32", 2–9 kg | 75/100 | 2 years | ฿1,290 |
| PYROZ Single | 1 | 17"–32", 2–9 kg | 75/100 | 1 year | ฿1,390 |
| Core Twin | 2 | 17"–32", 2–9 kg | 75/100 | 2 years | ฿2,200 |
| PYROZ Twin | 2 | 17"–32", 2–9 kg | 75/100 | 1 year | ฿2,290 |
| Astro Single | 1 | 13"–35", 2.5–12 kg | 75/100 | 2 years | ฿2,990 |
All five are full-motion gas-spring arms (tilt ±90°, swivel ±90°, rotation ±180°), support curved monitors, install by clamp or grommet, and include cable management. For most single-monitor desks the Core Single is the sensible default; heavy ultrawides up to 35" and 12 kg belong on the Astro, which also adds two USB 3.0 ports at the base.
Frequently asked questions
What is VESA and how do I check mine?
VESA is the standard screw pattern on the back of a monitor, measured hole-to-hole in millimetres — 75×75 or 100×100 for desk monitors. Measure the distance between the four holes, or check your monitor's spec page.
Do monitor arms work with curved screens?
Yes — a curved monitor mounts exactly like a flat one as long as it has VESA holes and its weight is within the arm's range. All ERGONOZ arms support curved monitors.
How thick can my desk be?
ERGONOZ desk clamps fit standard desktops (roughly 10–80 mm depending on model) and every arm ships with a grommet option as backup. Very thin or glass desks should use a reinforcement plate — see the ERGONOZ Reinforcement Plate.
What happens if my monitor is too heavy for the arm?
The gas spring cannot hold the position — the screen slowly sinks. If your monitor weighs over 9 kg, choose the Astro (up to 12 kg) rather than forcing an entry arm.
Is installation difficult?
No drilling is needed. Clamp the base to the desk edge, click the VESA plate onto the monitor, hang it on the arm, and adjust the gas-spring tension screw to your monitor's weight — about 15 minutes with the included tools.
The bottom line
Match weight, VESA, and mounting — in that order — and you cannot buy wrong. Browse the full range in our Monitor Arms collection; every arm ships free on orders over ฿800 and is backed by ERGONOZ Thailand's local warranty.
About ERGONOZ — a Thai ergonomics brand designing monitor arms, standing desks, and ergonomic chairs for the way you actually work. Read the brand story at ergonoz.com.