For Bows, even pellet rifles, I have ProChrono. Used to use it for rifles until the Magnetspeed became available. Prochrono has a large forgiving area between the sensors and good sun screens. Pretty durable too. I have used it for over 10 years.
Caldwell makes good stuff too, haven't used their chronos.
There is just really one chronograph, I would recommend staying away from - that is the Shooting Chrony. They are just hard to navigate the menu and have a small window for the object being tested to pass through. They have been around a long time though, but there is just better stuff out there.
https://www.amazon.com/Competition-Electronics-538002-SSI-ProChrono-Chronograph/dp/B0028