Ultimate Patient Positioning Chair

The S3 chair is part of our Next Generation Sonesta line. With three motors, seat, back and lift, a wide range of accessories and a user-friendly design it is the most versatile chair on the market. The ultimate patient positioning chair with infinite positioning creates a pleasant and ergonomic user experience as well as ultimate patient comfort. The three-motor chair enables a variety of different examinations and procedures.


  • Locking mechanism for one touch movement for precise
  • Versatile
  • Three motors are offered for height, seat and back adjustments
  • Easy access for the elderly and persons with disabilities
  • Engineered Ergonomics
  • Infinite adjustments as low as 40 cm (16”) to 105 cm (41″) high
  • Light weight and easy to move
  • Supporting 210 kg (465 lbs.) weight capacity
  • UL Certified

Video: Sonesta S3 – Presentation

Video: Sonesta S3 – Daily Use and Care Tutorial

Technical specification

CE-marked in accordance with guidelines in Medical Device Directive 93/42EEC

Length without extension cushion: 143 cm / 76”
Length with extension cushion: 193 cm / 56”
Width (total): 77 cm / 30”
Height with seat cushion (min.): 40 cm /16”
Height with seat cushion (max.): 105 cm /41”
Patient weight (max): 210 kg / 465 lbs
Wheel diameter (2 lockable + 2 directional): 10 cm / 4”
Net weight: 125 kg / 276 lbs


Power consumption: max 2.7A (120V~) 1.5A (230V~).
Input voltage: 120 ~ 60 Hz 230V ~ 60/50 Hz
Output voltage: 24VDC

Satisfies the requirements for EMC according to IEC 60601-1-2


Electric shock protection: Type B (Body):
Protection against water incursion and foreign objects: IPX6
Operating cycle (Intermittent): 10%