The CGO-ET thermal camera for the Yuneec H520 builds on the model introduced for the Typhoon H craft. However, new capabilities have been added which make thermal pictures and video much more useful and easy to capture. The ET is an affordable entry into the thermal camera world.
Note that the 520 ET WILL NOT work on the TH, or vice versa.
Yuneec's overview of the ET. (Use your page return to come back here after reading)