Heavy-Duty Operator Chair
One of our many Bariatric Office Chairs, the Sigma Operator Chair is designed for 24 hours daily use - for users up to 27 stone (170kg). It features robust construction with simple and professional aesthetics. It includes features that allow users to adjust the ergonomics to their needs throughout the day. Order today to enjoy a 3-year warranty for peace of mind, as it is certified and rigorously tested to high industry standards for safety and durability.- Tested for persons of up to 170kg (27 stone)
- Backrest, arms, and seat are generously padded and faced in a soft, comfortable fabric
- Designed for commercial use: shift workers, call centres, security and offshore facilities
- TUV and BIFMA tested gas lift seat for easily adjustable height
- These chairs are BS5459 certified
- Twin paddle levers offer infinite locking positions
- Reclining function with tilt tension control and swivel mechanism makes for easy manoeuvring
- Solid steel base is powder-coated in a luxurious silver shade
- Comes complete with twin wheel castors with silver detail
- Designed for 24 hours of use a day
- Multiple finishes available, order now for a 3-year manufacturer’s warranty
- View all Bariatric Office Chairs
Why You Should Trust Us At Office Furniture Online
We have many years within the industry and have developed strong relationships with our customers through our customer service and ease of upgrading office workspaces. With Office Furniture Online, you're guaranteed to find the best-selling office furniture products at discounted prices! With huge investments in distribution and warehousing, we can offer an unrivalled nationwide rapid despatch service on furniture products.Choose Office Furniture Online for dependable office equipment such as Chairs and Desks that will improve your workplace productivity. We specialise in all things office, shop with us today for the best products and enjoy our unbeatable customer service.
Suitable for All-Day Use
Produced with high-quality, strong and sturdy materials, making it ideal for heavy-duty use, 24 hours a day. Invest in adjustable, ergonomic seating that will ensure your staff work comfortably and remain focused during long shifts. Featuring a padded fabric seat and supportive backrest, this popular bariatric chair is eligible for our Next Day Delivery service - shop now!Bariatric Office Chair
The Sigma Bariatric Operator Chairs are suitable for users up to 170kg (27 stone). From its initial design to its robust construction, every step has been carefully considered to meet the needs of larger users without compromising on comfort or style. Suitable for 24-hour daily use in environments such as call centres, offices, and other demanding commercial settings.Adjustable Heavy-Duty Operator Chairs
With various adjustability settings, staff members can personalise the ergonomics of the Sigma Bariatric 27 Stone Operator Chairs to their preferences. The twin paddle levers allow infinite locking positions for reclining, while the gas lift mechanism ensures smooth seat height adjustment to match desk setups. The tilt tension control adapts to the user’s weight, offering a balanced recline without strain. The design of these operator chairs is to promote better posture while reducing discomfort, allowing users to focus more intently on work.Contact Office Furniture Online
Office Furniture Online is a leading supplier of high-quality 24-Hour Operator Chairs. If you’re planning a large project, we provide a Free Commercial Space Planning service to help you save time, space, and money by providing the best layout!For anything else, please contact us on 0333 7777 575.
Dimensions | (mm) |
Back Width | 520 |
Back Height | 500 |
Total Height | 887 to 962 |
Seat Height | 462 to 537 |
Seat Depth | 480 |
Seat Width | 520 |
Overall Depth | 660 |
Overall Width | 630 |
Warranty | 3 Years |

24 Hour Usage
Suitable for up to 24 hours a day, 7 days a week

Up to 170 KG
Suitable for users up to 170 KG

Fixed Arms
Maintains and support a natural posture while seated.

Gas Lift Adjustment
Adjust seat height to the optimum height for the user.

Tilt Lock - Infinitely Lockable
Lockable in any position. Seat and back move together.
What is BS EN 5459?
BS EN 5459 is a British Standard that specifies the requirements for office furniture, and is widely recognised within the industry. It ensures office furniture, like chairs, is built to withstand continuous and demanding environments.
BS EN 5459 is a British Standard that specifies the requirements for office furniture, and is widely recognised within the industry. It ensures office furniture, like chairs, is built to withstand continuous and demanding environments.