The DR1900 by Hach is a portable spectrophotometer with over 220 pre-programmed test methods, accepting the Hach and the Lange chemistry. It is rugged and has a large, clear screen, with easy to use navigation, making it great for use in the field. [caption id="attachment_15657" align="aligncenter" width="300"] The DR1900 portable spectrophotometer[/caption] The DR1900 will accept the followi...