Turb 430 T: pocket opacimeter, for field use, with (no suggestions) to US EPA incl. AMCO Kal.Kit (0.02-10-1000 NTU) optional: LabStation with LSdata software as a small laboratory device up to 1100 NTU, GLP-compliant Data processing via PC incl. Battery pack (LS Flex / 430, 251 301), battery set TB Flex / 430 (251 300)