Jenco Benchtop DO/Temperature Kit, Includes 9251N Handheld Polarographic DO Meter With RS-232 Interface, LD-900-10/10 Stainless Steel, 3/4” NPT Front W/ 10-ft, Waterproofed Cable, 8-Pin, LD-900-3A Membrane Kit 6-Caps, DO Kcl Powder, Sandpaper Learn More