Abstract: Now there is an acute problem of duly inspection of overhead power lines. To solve this problem, the devices with a possibility of wireless data transmission without reference to the transmitting stations that comprise a set of sensors needed to measure diagnosed overhead transmission line parameters have been developed. The use of modern electronic technologies and power supply circuits provides self-sufficiency of the devices since they do not depend on external sources of power supply and perform power take off directly from the line. Wireless data transmission is carried out by means of PAW modules. Such communication channel allows arrangement of not only inexpensive networks but also capable to self-recovery.