The DR900 by Hach is a robust, portable colorimeter, capable of performing many dozens of different tests, supporting the Hach chemistry type. It can accept a number of different sizes cuvettes/samples cells – 1 inch round sample cells 1cm sample cells 16mm COD/TNT vials [caption id="attachment_15641" align="aligncenter" width="300"] Hach DR900 colorimeter[/caption] Every Hach method c...