Myron L Ultrapen PT5 Dissolved Oxygen (DO) & Temperature Pen

The Myron L Ultrapen PT5 measures dissolved oxygen and temperature in a pocket-sized, waterproof pen. It uses an optical (luminescent) DO sensing approach that needs no membranes to replace and no electrolyte to refill, so there is far less to maintain than on a traditional Clark-cell DO meter — and no stirring dependency to bias a reading. Application Suited to groundwater and surface water sampling, low-flow purge monitoring, aquaculture and fish hatcheries, wastewater aeration checks, and any field round where DO drives a decision. Automatic temperature compensation is built in, the sensor is user replaceable (order RPT5), and a single N-type battery powers the pen. Features Dissolved oxygen and temperature in one pen No membranes or electrolyte to service Automatic temperature compensation User-replaceable DO sensor cap Waterproof housing with fully encapsulated electronics Documentation PT5 Data Sheet (PDF) PT5 Operation Manual (PDF) PT5 Quick Start Guide (PDF) Replacement DO sensors, calibration solutions and accessories: see our Myron L Parts & Accessories collection.