The Sony DSC-W810 has a CCD sensor type which is better than most similar spec cameras that came out in the last year. Most latest compact camera digital cameras have a MOS sensor type. CCD sensors produce high quality, low-noise images but consume a lot more power than CMOS sensors. CCD is the most common image sensor type used in digital cameras.
A CCD sensor type is in fact the best sensor type across all digital cameras that have been available for around the same time as the DSC-W810.
The worst sensor type amongst comparable types of digital camera is MOS.
There are a number of other cameras that have a CCD sensor currently available that you might want to look at including the Canon IXUS 175[plb_3191143_price] which has better reviews.