This is another article on Sensors using Arduion platform. The first one ‘WSN Made Easy With Arduino Platform? can be found here. This will help you to understand some of the easiest methods to start implementing your sensor nodes.

1 Everything You Need To Know About Arduino

Ben teaches you everything you need to know to start using Arduino microcontrollers in your projects. It is important to note the limitation of Arduino platform and areas of improvement if you intend to use the platform for a first project run without spending too much money on new devices.

read it all here;
http://www.wsnmagazine.com/sensors-in-arduino-platform/