Swivel chair

Every type of seating faces challenges when used at a 24-hour workstation. When the Sedus mr. 24 swivel armchair was being developed, these requirements were taken into account. The result is a design that is characterised by perfect ergonomics, an outstanding finish and absolute robustness. 24 hours a day.

Design: Michael Kläsener (Sedus Design Team)

Design your own unique Sedus product – after all, maximum comfort requires customised solutions.

Our configurator guides you step by step through the various options and customisation possibilities of the product. At the end of the configuration process, you can request a non-binding quote, download images and planning data and test the product directly in the room using augmented reality.

You can call up your personal configuration again at any time using your personal PIN code – just save it, come back later and make adjustments. Let's go!


Works continuously and never needs a holiday. A candidate for employee of the year

Fit for permanent use, the seat and backrest upholstery of Sedus mr. 24 are generously dimensioned and designed for heavy duty use, while the adjustment controls are user-friendly and very long-lasting. Even for people weighing up to 200 kilograms, this chair is comfortable and ideal for use  during shift work. The Sedus Similar mechanism enables a large opening angle and smooth motion of the body. This in turn enables relaxed working, even when the sitter leans far back in the chair. Comfortable neck supports and optimally adaptable armrests round off the extensive comfort characteristics of the chair.

DIN EN-1335-1:2023 Type A

Follows the most stringent requirements, is state of the art and provides comfortable seating for everyone. With the new office chair DIN EN 1335-1:2023 Type A standard, mr.24 meets the requirements for a diverse user base and their various demands.


Special features of a 24-hour chair

Office chairs that are in continuous use must meet special requirements in order to provide the best possible comfort even after many hours of use. This includes the neck support, the backrest and the seat, because the body should receive the right support in every position and at all times. That's why the 24-hour chair from Sedus is very robust, has top quality components and is guaranteed to be ergonomic.

•  High backrest with integrated lumbar support
•  Adjustable armrests with a locking mechanism
•  Similar mechanism with a 32° opening angle
•  Adjustable neck support
•  Sliding seat


Sustainable production

We purchase around two thirds of the steel, aluminium and wood which we require to produce our products in Germany and almost all the rest from Europe, this helps us to avoid long delivery routes whilst, at the same time, boosting the local economy. We use materials which have been tested and assessed with respect to potentially adverse effects on human health and the environment.


Sustainable production of mr. 24

  • Covers not glued into place
  • CFC-free foams
  • Galvanisation with chrome III
  • Use of certified upholstery fabrics in accordance with OEKO-TEX Standard 100
  • Produced using 100 % green electricity
  • Produced in accordance with EMAS III Environmental management
  • Produced in accordance with DIN ISO 14001 Environmental management
  • Produced in accordance with DIN EN 45001 Occupational safety



Leaning pressure adjustable
Adjustable backrest/lumbar support
Lumbar support depth adjustment


Armrests 3D armrests with soft-touch covers 3D armrests with leather covers 
Mechanism Similar mechanism with tension control  
Seat height-adjustment Sedo-lift mechanism 


Base Aluminium base black Aluminium base polished
Model colour / plastic parts black 



Sliding seat
Hard castors for soft flooring

Height-adjustable neck support in black leather for
models in fabric, for models in leather
Soft castors for hard flooring 
mr. 24

User weigt• Recommended for user weights up to 200 kg

• Comfortable upholstery with quilted seams for optimum pressure distribution
• Anatomically shaped seating surface with pelvis support and rounded front edge of seat 
• Upholstery thickness 50 mm 
• All-round edge frame in polyurethane for seat  to protect edges and upholste
• Seat upholstery can be changed
• Sliding seat with a seat surface depth adjustment of 420 to 480 mm and seat width of 470 mm, also available with a larger sliding seat and a seat depth adjustment from 455 mm to 515 mm

Seat height-adjustment • Sedo-lift mechanism: complete cushioning of body weight, even in lowest seating position, no compression of the spine when sitting downprovided by hydraulic interlock, completely free of wear and tear, mechanical failure or gas lift replacement, height adjustment between 420 - 520 mm
Base  • Aluminium base powder-coated black or polish
• Hard or soft castors with 65 mm diameter

• Comfortable upholstery with quilted seams for optimum pressure distribution
• Backrest covered in fabric on all sides  
• All-round edge frame in polyurethane for the backrest to protect edges and upholstery
• Thickness of foam on backrest upholstery 40 mm + 10 mm web
• Backrest upholstery can be changed
• Height- (70 mm) and depth-adjustable (40 mm) lumbar supp
• Optional neck support covered in black imitation leather, adjustable in height and tilt, vertical 50 mm, forward/back 22.5 °  
• Or neck support with ultra comfortable upholstery and covered in black leather, chrome-plated supports, with height adjustment 50 mm in five stages 


• 3D armrests with soft-touch or leather covers, height adjustment 110 mm (190 - 300 mm) 
• Armrest width adjustment 2 x 50 mm to the inside and outside to adjust the clear width (no tools required) 
• Additional width adjustment of 2 x 15 mm using tools
• Armrest depth adjustment 80 m

Mechanism • Similar mechanism with tension control: balanced force curve due to coordinated spring concept  
• Seat and backrest move completely synchronised with the body 
• Synchronicity relationship between seat and backrest 1:2.7
• Adaptation to different user weights enables sensitive latching of the rapid adjustment mechanism (leaning pressure 550 - 1500N [10N = 1 kg])  
• Backrest inclination to approx. 32°, can be locked in virtually continuously variable manner (11 different setting
• Permanent back support even when the backrest is inclined backwards at a wide angle, due to uniform force distribution of the mechanical spring
Standards / Certificates  • GS label by TÜV Rheinland LGA Products GmbH / DIN EN 1335 / DIN 4573 
• Ergonomics Certificate by TÜV Rheinland LGA Products GmbH
• Tested for harmful substances by TÜV Rheinland LGA Products GmbH
• AGR quality seal - Healthy Backs Campaign 
• BS 5459-2: 2000
Warranty 5 years 
30 years for Sedo-lift mechanism  

TO MEDIACENTER    You can also download all the images and documents from the Sedus Mediacenter.

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