Ergotron 45-384-026 LX HD Sit-Stand Desk Mount Monitor Arm

There is no Extension option for 45-384-026 monitor arm

Product ID 17795


  • Desk mounting LX arm 
  • 20" height adjustability: Provides sit-stand capability
  • 62" side-to-side adjustability
  • 14-30 lbs weightCan hold large monitors or mid-sized TVs weighing up to 30 lbs 
  • 49" screen size: Carries displays up to 49" in screen size
  • 33" horizontal extension: Extends display pushing it out of the way when not in use
  • Apple compatibility: Can mount 27" 2013 iMac with built-in VESA adapter
  • Please see, if your display is smaller and lighter


The Ergotron 45-384-026 is a versatile arm. Use it in your office to mount a large monitor to analyze data or mount a mid-sized TV for digital signage in a retail store weighing up to 30 lbs (13.6 kgs)

The LX provides unparalleled range of motion, being able to accommodate a user’s sitting or standing posture. Features include 20 inches (51 cm) of vertical adjustment and 62 inches (157 cm) of side-to-side motion.

Technical Drawing

Technical Drawing for Ergotron 45-384-026 LX HD Sit-Stand Desk Mount LCD Arm

Technical Specifications

LCD size Capacity Lift Tilt Pan Rotation VESA
Screen Capacity Lift Tilt Pan Rotation VESA
Up to 46"

14 - 30 lbs

6.3 - 13.6 kg


51 cm

80° 360° 90° MIS-D/E/F

Product Information

Part Number 45-384-026
Description LX HD Sit-Stand Desk Mount LCD Arm (polished aluminum)
  • LX HD sit-stand arm
  • Extension
  • Desk clamp base
  • Grommet-mount base
  • 40 cm pole
  • VESA brackets
Quality Tested 10,000-cycle test applied to lift mechanism, ensuring years of trouble-free height adjustment
Weight Capacity 14 to 30 lbs (6.3 to 13.6 kg). Monitor depth may affect weight capacity
Monitor Tilt 75° up and 5° down
Mounting Standards VESA MIS-D, 75/100 (hole pattern = 100 x 100 mm & 75 x 75 mm), MIS-E (hole pattern = 200 x 100 mm), MIS-F (hole pattern = 200 x 200 mm ONLY). Optional VESA Bracket Adaptor Kit (97-759) can be ordered separately for MIS-F interface with hole pattern of 400 x 200 mm, 400 x 300 mm or 400 x 400 mm
Locking Connections Between arm, extension and base offer increased theft deterrence and prevent potential disconnections caused by jarring or impacts
Mounting Options Desk clamp attaches to edge up to 2.5" (65 mm) thick; grommet mount attaches through hole 0.5" to 2.5" (7–65 mm) wide and up to 2.5" (65 mm) thick
Cable Management Clips on the under side of the arm route and hide cords
LX Sit-Stand Keyboard Arm To add an LX Sit-Stand Keyboard Arm to the configuration, order 45-354-026. Attach keyboard arm at base of pole while leaving the arm’s wall-mount base unused.
NOTE Computer systems mounted on this product may require extra long USB, power or video cables in order to span between standing and sitting heights
Product Weight 17.5 lbs (8 kg)
Shipping Dimensions 25" x 14.75" x 7.5" (64 x 38 x 19 cm)
Shipping Weight 20 lbs (9.1 kg)
Warranty Ten (10) years


  • 20" height adjustability allows users to alternate between sitting and standing positions while working on the display
  • Extends LCD up to 33" and pushes display out of the way when not in use
  • Vertical, horizontal adjustability provides ergonomic relief and relieves stress on the back, shoulder and neck
  • Increase viewing comfort - help reduce eye, back and neck strain
  • Upgrade LCD monitors and TVs with improved ergonomic adjustment
  • Patented CF motion technology provides premium ease-of-use adjustment
  • Cable management clips on the under side of the arm route and hide cords
  • Ideal for space-constrained spaces - folds to within 4.5" (12 cm) of back of desk in storage position
  • Secure installation - locking connections between arm, extension and base
  • Passes Ergotron’s 10,000-cycle motion test, which ensures years of trouble-free height adjustment

Frequently Asked Questions

q I have two questions about this Ergotron product. First question is my user is 5'7", will this work as a sit/stand option with the pole only being 16"? Secondly, with the dual monitor kit, how heavy can both monitors be and the arm still articulate for sitting/standing?

Even though the pole is only 16", this arm will work as a sit-stand option for your user. If you add a dual monitor kit, the weight capacity of the arm will reduce from 30 lbs to 24 lbs as the dual monitor kit adds 6 lbs weight of its own. Also both the monitors need to be between 17-24" in screen size with an outside width of 14-24.5". Even if you add the dual monitor kit, arm will still articulate for sitting/standing, that is, 20" height adjustment.

q With the Ergotron 45-384-026 clamped onto a desk, at its highest extension how many inches above the desk does it hold the monitor? I know that'll ultimately vary by monitor size but just trying to understand how many inches higher this provides at its peak. Also, just to confirm is it flexible enough so that at its lowest point it holds the monitor as low as the surface of the desk?

At its highest extension, the LX HD Sit-Stand Mount Monitor arm is 26” above the desk from the center of the monitor. The post is 16”, so if you mount the arm at the top of the post, plus the 10” height adjustment (arm adjust 10” up and 10” down), you get the 26” at the highest at the center of the monitor. Yes, it is flexible enough it can go as low as hitting the bottom of the surface of the desk.

Model 45-384-026
Manufacturer Ergotron
Part Number 45-384-026
UPC 698833040098
Color Polished aluminum
Monitor Size Up to 46"
Weight Capacity 14–30 lbs (6.3–13.6 kg)
Adjustments 20" (51 cm) of vertical adjustment and 62" (157 cm) of side-to-side adjustment
Tilt Up 75 degree and down 5 degree
Pan 360 degree
Rotation 90 degree
Mounting Pattern VESA MIS-D, 75/100 (hole pattern = 100 x 100 mm & 75 x 75 mm), MIS-E (hole pattern = 200 x 100 mm), MIS-F (hole pattern = 200 x 200 mm ONLY)
Weight 17.5 lbs (8 kg)
Shipping Dimensions 25" x 14.75" x 7.5" (64 x 38 x 19 cm)
Shipping Weight 20 lbs (9.1 kg)
Warranty Ten (10) years
Mounting Options Desk
Monitor Arm Types 1 Monitor
Number of Monitors 1 Monitor

Customer reviews

  • 1 stars 0
  • 2 stars 0
  • 3 stars 0
  • 4 stars 0
  • 5 stars 11
(5 out of 11)
Works well

by Walter O Haas, SALT LAKE CITY, Utah, Aug 12, 2021

I bought this as a necessary upgrade from a smaller monitor arm when I got a larger, heavier monitor. This arm is longer than the old one so it was necessary to drill a new mounting hole in my desk. With that change everything now works well.

Excellent Product.

by University of Alaska Southeast, Juneau, Alaska, Apr 30, 2018

Excellent product. Easy to install. Versatile and easily changes to whatever position you need. Since there is no bulky desk stand it leaves the desk uncluttered, neat and tidy with more usable space.

Great Product

by Brian C, The Woodlands, Texas, Feb 21, 2017

We used this product to mount a TV in our living area. It was easy to mount and very sturdy. This is great product in both function and appearance.

works better than I could have hoped

by Teddy S, California, Jun 20, 2016

I got this arm for my new cintiq 27" and it works perfectly for all of my digital art needs allowing me to set it up in really any position I might need it in. Purchasing it I was a little afraid of it potentially dipping down because of the weight of my cintiq but after adjusting the tenting it doesn't dip at all. If you need or want this kind of range of motion for digital art or otherwise this is what you're looking for.


by Jose A, Florida, Mar 04, 2016

You get what you pay for, a well made solid sturdy stand. I mounted a 27 inch Imac, installation was a breeze. Monitor floats nicely, only thing is I regret not ordering the handle and maybe the keyboard attachment.

Great product

by kathy m, Washington, Jan 06, 2016

This product is everything I wanted and more. Really heavy duty. I use it to hold up a 27inch Cintiq display on my desk. It allows me to move the monitor any way I want including elevating it enough so I can draw standing up.
I installed the unit by drilling a hole in my desk because the frame of the desk at the edge isn't wide enough to hold anything. I would recommend this approach because, also it is more hassle, it is VERY solid.

Best Computer Accessory Purchase Ever

by Bob R, Pennsylvania, Jul 15, 2015

I don't normally write reviews of products, but I love this thing so much I feel I should. I was considering some of the other sit/stand options like the whole desktop that raises or the self contained monitor and keyboard type that slides up and down. I'm glad I settled on this, it gives me more options IMO. When I'm standing the proper height for the keyboard is always the same, so I found a nice monitor stand that is just the right height and place my keyboard and mouse on that. So when I'm sitting or standing the options to adjust everything in and out or up and down are endless. And it seems to be really, really well built, totally worth the price.

Love this monitor arm

by Colleen K, California, May 29, 2015

It works great with my 72" sit/stand/walk desk and holds my 27" monitor perfectly

30" 24lb monitor easily handled

by Carsten B, California, May 29, 2015

I wanted a sit stand work area. My cube has an adjustable-height keyboard area. I had Facilities raise the entire desk, so that the keyboard area lowest point was comfortable for sitting, and the keyboard area highest point was comfortable for standing. Now I just needed to adjust the monitor height. I chose this monitor arm because I have a large, heavier monitor, and this monitor arm could easily handle it. The vertical travel is enough to to match my eyeline both sitting and standing. I easilty mounted it to the desk with the clamp mechanism. After adjusting the tension, with two fingers I can raise or lower the monitor quickly. It doesn't shake. My colleagues are jealous.

Love It!

by JumpinJohn, Texas, Apr 27, 2015

This has solved my work space issue. I can stand, sit, move the monitor out of the way when I need the extra desk space, etc. It is very well made. Solid as a rock -- Very well made.

Quality atop quality

by Andrea M, Missouri, Apr 23, 2015

When looking for an arm to support a 32" monitor over a rather expensive audio recording console I wanted a quality product. The Ergotron arm was recommended to me by a close industry contact and am I ever pleased. This item is quite well engineered, constructed to a very high level of quality, easy to assemble and put into operation. Well worth the investment and highly recommended.


All Ergotron and OmniMount durable products will remain free of defects in material and workmanship for a period of five years from the date of receipt of the product, subject to any exclusions and limitations as set forth below.


  • Ten-year warranty on all HX Products, as well as LX and MX Products purchased on or after August 1, 2014

  • Zip and YES Charging Systems: Lifetime material/workmanship; three years electrical components; one year cables (power/Ethernet)

  • Ten-year warranty on LearnFit Sit-Stand Desks

  • Three-year warranty on all Neo-Flex Ergotron Products

  • Two-year warranty on WorkFit-Z Mini

  • Elevate and accessories: Lifetime material/workmanship. Five (5) years on electrical components. Cords, cables and plugs not warranted

  • The Peanut, Zido and accessories: Lifetime material/workmanship; five (5) years for pneumatic cylinder

  • One-year warranty on electronic components. For example: Auto Lock Drawers, Auto Lock Systems, Keyboard Lights, User Interface, Coiled Cord, Battery Harness, Cables from User I/F to Power Module (excludes AA batteries)

  • Two-year warranty on Power Modules by Ergotron

  • Sealed Lead-Acid (SLA) Power Systems, SLA Batteries

  • Two-year warranty on all SLA power system components by Ergotron

  • Up to one-year capacity warranty on SLA batteries (refer to Further Exclusions and Limitations section)

  • Six-month warranty against Manufacturer’s Defects on SLA batteries, or as mandated by local law

  • Lithium Iron (LiFe) Power Systems, LiFe Batteries

  • LiFe battery capacity is warranted for two years or 1200 discharge cycles, whichever comes first (refer to Further Exclusions and Limitations section)

  • Five-year warranty against Manufacturer’s Defects on LiFe factory-installed batteries (excludes LiFe replacement batteries). Factory-installed LiFe batteries are covered at 100% for the first three years; coverage for years four and five are prorated at 1/60th per month (refer to Further Exclusions and Limitations section)

  • Service Programs - 30-day warranty

  • Refurbished StyleView Carts - one-year warranty for Mechanical Components and Power Module (excludes batteries and cosmetic defects). The appropriate battery-type warranty applies

  • Original Equipment Manufacturer (OEM) Products resold by Ergotron are warranted by the respective manufacturer

  • StyleView Electric Lift motor: Three (3) years on motor and switch

Further Exclusions and Limitations

SLA Batteries

  • In Dual SLA battery systems, replacement of both batteries must occur at the same time (in accordance with the Ergotron User Manual), or the Warranty is automatically void

  • Warranties on SLA batteries (fully-charged or fully-uncharged) left in an unused state for more than three consecutive months are automatically void

  • Factory-installed SLA batteries, and replacement SLA batteries carry a Six-month Warranty Against Manufacturer’s Defects and a 90-day Performance Warranty, or as mandated by local law

  • The 90-day Performance Warranty on factory-installed SLA batteries (excludes SLA replacement batteries) is extended to one-year provided that:
  1. StyleLink software is installed and remains continually operational to show compliance with exclusions and limitations

  2. SLA Battery is not discharged below 25% capacity more than 25 times as recorded by the StyleLink software history

  3. SLA Battery is fully recharged at least once every 36 hours as recorded by the StyleLink software history

LiFe Batteries

  • LiFe batteries that fail to deliver 70% of their rated capacity during the first 1200 discharge cycles of battery life are deemed not to have met performance standards (capacity retention)

  • The LiFe battery discharge cycle is defined as starting at the fully-charged state through the fully discharged state and back to the fully-charged state. Discharge cycle counts are calculated by the software within the battery.

These warranties do not cover product abuse, modification and failure to adhere to product instructions, improper operations and/or misuse. Ergotron is not responsible for damage arising from failure to follow instructions relating to the product’s intended use. Ergotron is not responsible for injury or loss caused by or associated with the installation and/or use of equipment in any manner other than in strict conformance with the instructions set forth in its installation manuals, supplemental assembly and installation instruction sheets, technical bulletins and/or product literature. You will provide Ergotron immediate written notice of any personal injury resulting from the use of Ergotron products.

Ergotron does not warrant damages or defects to the Ergotron product under the following conditions: an Act of God, unauthorized service or repair of the Ergotron products, damage from electrical power problems, usage of parts or components not supplied by Ergotron, failure to follow product instructions and guidelines, unauthorized changes to the Ergotron product, shipping damage (other than original shipment from Ergotron), failure to perform preventative maintenance, or damage caused by peripherals or software or from other external sources.

Exclusive Remedy

Warranty Repair: In the event that any Ergotron equipment becomes defective in material or workmanship during the warranty period, Ergotron will determine with you if the product defect is covered under warranty. Ergotron, at its sole discretion, may replace or repair the unit determined to be under warranty at a designated Ergotron location or at your location. The labor costs associated with the repair of the product may be the responsibility of Ergotron if determined to be under warranty. You must receive pre-approval by Ergotron for the labor costs prior to repair or replacement of warranty products. You must contact Ergotron to obtain a Return Material Authorization (RMA) number. An RMA number may be obtained by contacting Ergotron Customer Care online or by telephone within your specific region. Contact information is available to you on the Ergotron web site at www.ergotron.com. Performance of any repair or replacement on product under warranty does not renew or extend the warranty period.

Non-Warranty Repair: You may return a product for repair that is not covered by warranty only if you have received a preapproved RMA number from Ergotron Customer Care. Labor costs and freight charges associated with non-warranty repair will be the sole responsibility of the customer, reseller or installer/integrator. A standard repair fee, specific to the product, is charged for any product that is repaired outside of the warranty period. Repairs on products out of warranty also carry a 90-day warranty, effective the day that you receive the item after repair.

For products that are not covered under warranty, Ergotron offers you the following options:
  1. You may upgrade to a newer, functionally equivalent product at a normal MSR list price

  2. Ergotron will return the product to you

  3. You can request in writing that Ergotron appropriately dispose of the product for you. A fee may apply for this service as designated by local law

Non-Defective Products: You are notified if, after examining and testing a returned product, Ergotron concludes that the product is not defective. The product is returned to you and you would be responsible for the freight charges associated with the return.

Warranty Disclaimer

Except as expressly set forth in this Limited Warranty and to the greatest extent allowed by law, Ergotron makes no other representations, warranties or conditions, express or implied, including any implied representations, warranties or conditions of merchantability, fitness for a particular purpose, non-infringement, and non-interference. Ergotron does not warrant that your use of the Ergotron product will be uninterrupted or error free. Any implied warranties that may be imposed by law are limited in duration to the Limited Warranty period, to the greatest extent allowed by law. Some states or countries do not allow a limitation on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages for consumer products. In such states or countries, some exclusions or limitations of this Limited Warranty may not apply to you. This Limited Warranty is subject to change without notification.

Ergotron devices are not intended to cure, treat, mitigate or prevent any disease.

Warranty Transferability

This Limited Warranty is available only to the original end consumer and is non-transferable. For this warranty to be valid, the Ergotron product must have been purchased directly from an authorized distributor, reseller and/or authorized representative of Ergotron.