Toilet and urinal automatic flush-valve retrofit kits streamline installation by eliminating the need for fixture-specific kits. They pair with either tankless toilets or urinals and convert flushometers from manual to automatic operation for hands-free flushing.
https://www.grainger.com/product/SLOAN-Automatic-Flush-Valve-Retrofit-20CM32?searchQuery=20cm32&searchBar=true