I use a cheap plastic caliper like this one to measure food for calculating sous-vide times. Mine's smaller than this one... only opens a few inches.
Also, industrial nylon or polyester filter bags, down to 5 microns. These are the same thing as Superbags, but come in more (and finer) mesh sizes, and cost a fraction. Great for anytime a chinois isn't fine enough, but you don't need to actually clarify something. Make sure to get the mesh ones and not the felt ones (you can't clean and reuse the felt).
