The 2020 Turbidimeter is now available in a waterproof version. This is a handheld unit that can be used in the field or lab. It is rated waterproof to IP67 and features lithium rechargeable batteries, a backlit display, USB port and seven language options. The meter complies with the U.S. EPA 180.1 standard, using a tungsten light source protected by a waterproof chamber with removable cup.