Ever heard the common Thai phrase – “Same, same but different”? Well this applies well to the SonTek RiverSurveyor-M9 and HydroSurveyor-M9, albeit literally. Same hardware, but very different firmware, software and application between the two. Join Product Manager Isaac Jones in this short video as he summarizes the main differences. If you have questions about which is the best for your application, which one to measure river velocity and discharge or map bathymetry, Isaac clears up the differences in this video.