Compact, rugged design with large, easy-to-read digits. Fisherbrand Traceable Portable Dissolved Oxygen Meter Pen has a water-resistant design with O-ring seal and membrane keypad which assures a long life in severe lab or harsh plant environments.

Reliably measure dissolved oxygen (optical/polarographic) and temperature with this RDO/DO portable meter for advanced field analysis.

Take simple dissolved oxygen and temperature measurements with this portable meter with easy operation for basic field testing.

Traceable to NIST™ standards.

Accurately monitor dissolved oxygen (optical/polarographic) and temperature with this RDO/DO portable meter for challenging field testing.

Portable meter provides reliable and high quality dissolved oxygen (DO) measurements with simple click of a button