An advanced Mattress Replacement System (MRS) with alternating pressure redistribution.

The Nimbus® 4 system combines automatic adjustment of cell pressures, the Heelguard™ and unique vent valve technology to provide effective pressure relief and improved solutions for a wide range of resident/patient management issues.

The Nimbus 4 MRS provides effective alternating pressure relief combined with automatic adjustment to the weight, size and position of the individual, ensuring optimum pressure relief and comfort.

Mattress (specifications apply to both
the Nimbus 4 and Nimbus professional systems)

  Standard Narrow
Length 2060 mm (81") 2060 mm (81")
Width 890 mm (35") 800 mm (31 1/2")
Maximum height 215 mm (8 1/2") – at edges 215 mm (8 1/2") – at edges
Maximum profile height 380 mm (15") – at edges 380 mm (15") – at edges
Cell height 203 mm (8") – inflated 203 mm (8") – inflated
Weight (including packaging) 15.5 kg (XX lbs) 14.3 kg (XX lbs)
Cover material PU coated knitted fabric PU coated knitted fabric
Cell material 0.3 mm (XX") PU flexible sheeting 0.3 mm (XX") PU flexible sheeting
Max patient weight 250 kg (550 lbs) 250 kg (550 lbs)


Length 508 mm (20")
Height 220 mm (8 3/4")
Depth 100 mm (4")
Weight 5.7 kg (25")
Case material ABS/polycarbonate blend
Supply voltage UK 220-240 VAC, 50Hz
Electrical rating 35 VA
Fuse rating F500mA
Filters All service replaceable
Operating cycle 10 minutes

Tube set

Length 1000 mm (39 1/2")
Tube material 5-way moulded PVC
Tube connectors Moulded nylon

Electrical safety standards

IEC601-1 IEC 60601-1 (BS EN 60601-1) IEC 60601-1-2 (BS EN 60601-1-2) VDE 0750 Teil 1
Degree of protection against electric shock Class I, type BF
Degree of protection of ingress of liquids Ordinary
Mode of operation Continuous

Key features

  • The mattress is designed to support residents/patients up to 250 kg and provides the best possible pressure redistribution for all resident/patient types all stages of tissue damage.
  • An Automatt sensor pad, below the entire length of the mattress, works with the automatic pump to constantly readjust cell pressures keeping the interface pressure below 10 mmHg for up to 40% of the operating cycle.
  • Five heel cells incorporate vent valve technology, allowing the caregiver to fully remove interface pressure from this high risk area, and providing zero pressure for the most vulnerable residents/patients, such as those with limb ischaemia or existing wounds.
  • The unique mattress design provides a 200 mm (8”) inflated cell height withan anti-sink torso section, supporting residents/patients in lying or profiled positions, thereby reducing the risk of bottoming out.
  • Cardio Pulmonary Resuscitation (CPR) and Rapid Air Deflate Release (RADR) is a quick release, single-handed function located on the mattress control unit that enables rapid air deflation for emergencies, short-term physiotherapy, resident/patient transfers and handling or storage.
  • Vapour permeable, water resistant 2 way stretch cover offers optimum pressure redistribution and comfort. This loose fitting top cover is attached to the mattress base by concealed zips to reduce ingress of unwanted fluids. The cover is also flame retardant, easy to clean and can be completely removed for laundering.