Sleep Fragmentation Chamber

Model 80391


The Sleep Fragmentation Chamber is suitable for sleep deprivation and sleep fragmentation studies in rats and mice. System replaces the Model 80390 Sleep Deprivation Chamber.


The Model 80391 Sleep Fragmentation Chamber is used to provide researchers with the necessary tools for sleep fragmentation studies in both mice and rats. The 80391 maintains an animal environment that is virtually identical to that used in the original 80390 Chamber.  The divider wall has been removed since a much faster sweep time is now possible.  The sweep bar, food hopper, ad lib water and ventilated lid remain the same.  The living environment is now independent of the drive mechanism to reduce noise and greatly facilitate cleaning.  It resembles a standard living environment that includes food and water support.  The height of the sweeper bar is adjustable to accommodate bedding.

The cycle time selector includes a variety of different cycle times.  The continuous sweep setting now takes just 7.5 seconds.  Selectable inter-sweep cycle values start at 0.25 minutes (15 seconds) all the way up to 30 minutes.  Alternately, sweeps may be initiated from a remote device.

Sleep Fragmentation Bar


Power Supply

  • 9 VDC @ 2A center positive supply (included)

Cycle Times

  • Continuous: Approximately 7.5 seconds
  • Selectable (min): 0.25, 0.5, 1, 1.5, 2, 3, 4, 5, 10, 15, 20, 25, 30

External Initiate / Event Output

  • General: 2.5mm connection, 3 conductor
  • Base: Ground
  • Ring: Event Out - Open collector, Pull up if needed (30 VDC max)
  • Tip: Ext Initiate, active low switch closure


  • Outside: 16.0”L x 10.5”W x 14.5” H (40.6 x 26.7 x 36.8 cm)
  • Inside Living Space: 9.24”L x 7.49”W x 7.52”H (23.5 x 19.0 x 19.1 cm)
  • Weight: 12 lbs (5.4 kilograms)

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