How Many Sensors are in a Sony camera?

Searching to buy a new camera, I did a lot of research, I browsed thousands of web pages in a very short time. I focused primarily on Canon XH A1s and Sony's FX1000, Z5 and Z7. I discovered amazing things:

1. Canon's sensor(1.67 million pixels) is about 30% bigger than Sony's (1.12 million) as measured in pixels.
   
2. Canon's sensor has 1440x1080 recording pixels while Sony's has only 1440x810
   
3. I doubt that above mentioned Sony cameras have three different CMOS sensors. The Sony manual of the cameras says: "6mm (1/3 type) 3CMOS sensor". Beware of the singular form of noun sensor. 3CMOS, as spelled in manual, could mean anything but not necessarily three CMOS sensors. More: 810 pixels height it means the sensor is wider thus has a smaller area for a given length of diagonal.
   
4. Canon manual clearly states 1/3 inch CCD x 3.
   

What mostly amazes me is that no single producer publishes the real absolute sensor size nor clearly states how many sensors are in it. Take a big look to what you wanna buy and read as much as you can before you pay.