Hanna Optical Dissolved Oxygen Meter Kit Plankton Net Simply switch the head assembly

Simply switch the head assembly on your core tube to convert it for use in different applications

which provides a secure threaded connection for compatible needles

Pocket thermometer with plastic carrying case and pocket clip

The rotating impeller doesn't touch a thing

the SF41 is used in conjunction with the SF40 Controller or as part of the SF44 Controller/Timer Kit

Hanna Optical Dissolved Oxygen Meter Kit Plankton Net Simply switch the head assemblyProduct Code: HI98198 The Hanna HI 98198 Optical Dissolved Oxygen Meter Kit produces readings you can rely on. It's made from highly durable materials and advanced technologies to provide you with long lasting accuracy. It can even log up to 4,000 individual readings. Plus, the DO meter comes with a probe and various accessories and solutions. Features: Measures the concentration of dissolved oxygen in water Requires no membranes, no filling solution