Several Sentria versions were made from 2007 to 2010. A007kirbyman provided a good list of the differences between the years. How is the manufactured year identified from the bottom label?
2007 xx ~~ New Handi-Butler discontinued
2007 xx ~~ Redesigned Zipp Brush (only recently released due to prior inventory)
2008 02 ~~ Two (2) New Pet Owner Brushrolls introduced (G3/4 & G5/G10)
2008 12 ~~ Polymer base pan
2008 12 ~~ "F" style bag top adaptor & bags
2009 12 ~~ Straight zipper
2010 09 ~~ New style Mini Em-Tor®
2010 11 ~~ New LED headlight, circuit board & harness assy

2007 xx ~~ New Handi-Butler discontinued
2007 xx ~~ Redesigned Zipp Brush (only recently released due to prior inventory)
2008 02 ~~ Two (2) New Pet Owner Brushrolls introduced (G3/4 & G5/G10)
2008 12 ~~ Polymer base pan
2008 12 ~~ "F" style bag top adaptor & bags
2009 12 ~~ Straight zipper
2010 09 ~~ New style Mini Em-Tor®
2010 11 ~~ New LED headlight, circuit board & harness assy
