Dear Sir/Madam My name is Nemat Mardani.I am Ph.D. student of textile engineering at Polytechnhc university in Tehran.It would be your kindness if send me some information about "microwave sensors" in this field: 1-can they be used to detect yarn responce to impact.if yes could you say in details. 2-do you have any idea about the price. 3-how they can be used in a cicuit. 3-which famous companies are dealing with. I am looking forward to hearing from you.