Dissolved Oxygen Meters

Accurate dissolved oxygen (DO) readings matter in many fields, from wastewater treatment and environmental monitoring to aquaculture, food production and laboratory research. Our range of dissolved oxygen meters covers both quick field checks and demanding lab analysis, so you can find the right instrument for your application.

Choose from three measurement technologies. Optical DO meters, such as the opdo HI-98198 and the HI-6421 benchtop meter, use luminescence-based sensors that need no warm-up, use no oxygen while measuring and need very little maintenance. Polarographic and galvanic probes are proven, cost-effective options. They include the HI-9147 for fish farming and the easy-to-use HI-9142.

For laboratories, our benchtop meters range from the HI-2640 and the HI-2641 with data logging to the modular HI-6000 series. The HI-6000 lets you combine DO with pH, ORP, ISE and EC in one flexible system. The edge hybrid meters work as benchtop, wall-mounted or portable units, so you can measure wherever you need to.

For fieldwork, our waterproof portable and multiparameter meters, such as the HI-98194, HI-98196 and the Bluetooth-enabled HI-98494 and HI-98594, measure DO alongside pH, conductivity and other key parameters in a single device. The HI-98193 also supports BOD measurements, which makes it a strong choice for wastewater applications.

We also stock replacement membranes, DO modules and accessories to keep your instruments working at their best. Need help choosing? Our team is happy to help you find the right dissolved oxygen meter.