Wireless Optical Dissolved Oxygen Cap • PS-3250

Replacement cap for PS-3246 optical dissolved oxygen sensor. (The version with the 1 m cable). Cap contains a glass window with a phosphorescent coating covered by a neoprene scratch guard. Dissolved O2 quenches phosphorescent film, timed decay measured to find O2 levels. See this product's details for a complete description, specifications, and buying guide.