Armoured Thalweg Instrument Enclosure. Stainless steel sensor housing and conduit, 20m.  Protect your sensitive sonde in rough water.  Patent-pending design keeps the sonde above the streambed, sediment free, and protected by “going with the flow”.  From the practice of Judo “Yanagi ni yukiore nashi” literally means, “Willow trees don’t break under the weight of the snow.”