VisibleDust, Inc recently announced the Brite Vue XL based technology Sensor Loupe which helps in examining sensor of a DSRL! The sensor of a DSLR is located in the camera chamber and difficult to reach and hence the unique BriteVue XL lighting system helps in examining the sensor without damaging it!

Sensor Loupe is pretty compact and has been outfitted with a high resolution lens made of e 5x magnified K9 optical glass with MgF2 coating. The Sensor Loupe comes bundled with a carrying case, a neck strap and a micro fiber cloth. It sells for U.S. $69.95 and for more info go here: http://www.visibledust.com/