Long Range WiFi

Hello every one,

I need a long range routers to transmit data for a distance of about 1 Km.

My application is a "robotic deflectometer" that works under ground (5m under soil).
This robot will move in fiber glass pipes, making measurements and taking snapshots, then sending data by WiFi.

<<The two routers can see each others (the 1st router will be placed at the entrance of the pipe ( stationary ) which receives data,
While the 2nd router will move in the pipe ( mobile ) and transmit data for the first router ) but there might be some curved paths in the pipes, so routers may be out of sight.>>

So i am interested in long range WiFi routers with a long range.

So could any one please advise a certain system for my application.

Thanks all,

Hello the engenius eoc2611p would be a good one to try.

Keenan Systems Wireless Store - EnGenius 600mW EOC2611P 802.11bg outdoor AP / Bridge w 10dBi

The have a 10dBi directional antenna and 600mW of power LOS range is more than 3 miles.