Micaz... We can use Contiki OS and make simulation with Cooja before deploiment.

Micaz is a good choice

TelosB... we are using this with PIR Sensor in TinyOS... Its a Platform for low power research development...

Thank you for your answers.

in fact, we look for the most appropriate sensor node (to buy) for lab experiments.

Micaz

Thank you for your answer

Hi Mohamed, 

I hope you are doing well, 

Try zolertia motes (RE-Motes or Z1) I am using  this platform for my courses IoT. 

Please check this link : http://zolertia.io/

Hi Rafik,

I'm fine, II hope you are doing well

Thanks alot for your answer.