WEMA
The tank depth is not the sender length, sender depth is less by usually about 3/4 inch, so anyone stepping on the tank top doesn't crush the sender into the bottom.
Contact Grady and ask for sender length, make sure you tell WEMA sender length, not tank depth.
The WEMA unit are very substantial in construction, no exposed electrical parts or connections, cast stainless flange, and welded stainless tube, no no hinged arm business.