ORP Meters

An ORP (oxidation-reduction potential) meter measures a solution’s ability to oxidise or reduce, given in millivolts (mV). It’s a key measurement wherever disinfection, water treatment or chemical processes need to be checked. Common uses include pool and spa water, drinking water and wastewater, aquaculture, food production and laboratory research.

At HannaNorden we offer a full range of ORP meters from Hanna Instruments, so you can find the right instrument for the job:

• Pocket testers: Compact, easy-to-use testers such as the HI-98120 and HI-98121 for quick checks in the field. There’s also the HI-981214 Pool Line, made for pool owners and service technicians.
• Portable waterproof meters: Rugged instruments like the HI-98190, or the multiparameter HI-98195 and HI-98196, which combine pH, ORP, EC or DO in one device.
• Benchtop meters: Precise lab meters such as the HI-2620 and HI-2621 (with data logging), and the research-grade HI-5222. All support stable, repeatable measurements.
• Advanced multiparameter systems: Modular solutions such as the HI-6000 series and the HI-9829 for demanding monitoring of several parameters at once.

Most models measure ORP together with pH and temperature, so you get a fuller picture of your water quality. For accurate results, calibrate regularly and keep your electrodes clean. You’ll find calibration solutions and electrodes in our range.

Need help choosing? Contact our team for expert advice.