![Hach HQ1110 Portable Dedicated pH/ORP/mV Meter with General-Purpose Gel pH Electrode, 1 m Cable from Cole-Parmer Hach HQ1110 Portable Dedicated pH/ORP/mV Meter with General-Purpose Gel pH Electrode, 1 m Cable from Cole-Parmer](https://pim-resources.coleparmer.com/item/l/hach-lev015-53-11102-portable-dedicated-ph-orp-mv-meter-with-general-purpose-gel-ph-electrode-1-m-cable-5900503.jpg)
Hach HQ1110 Portable Dedicated pH/ORP/mV Meter with General-Purpose Gel pH Electrode, 1 m Cable from Cole-Parmer
![Amazon.com: PH?803W PH ORP Controller Digital pH Meter Acidity Alkalinity Controller Water Quality Monitor(US Plug 110V) : Industrial & Scientific Amazon.com: PH?803W PH ORP Controller Digital pH Meter Acidity Alkalinity Controller Water Quality Monitor(US Plug 110V) : Industrial & Scientific](https://m.media-amazon.com/images/I/71rtCo85GpS._AC_UF894,1000_QL80_.jpg)
Amazon.com: PH?803W PH ORP Controller Digital pH Meter Acidity Alkalinity Controller Water Quality Monitor(US Plug 110V) : Industrial & Scientific
![Hanna Instruments HI 9125N Portable pH/mV Meter, with Enhanced Design: Science Lab Ph Meters: Amazon.com: Industrial & Scientific Hanna Instruments HI 9125N Portable pH/mV Meter, with Enhanced Design: Science Lab Ph Meters: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/71wWbJD8GxL.jpg)
Hanna Instruments HI 9125N Portable pH/mV Meter, with Enhanced Design: Science Lab Ph Meters: Amazon.com: Industrial & Scientific
![Bante 221 Handheld pH Meter | Portable pH ORP Meter | Equipped with pH and ORP Electrodes | Accuracy ±0.002 pH, ±0.2 mV | 500 Sets of Data Storage: Amazon.com: Industrial & Scientific Bante 221 Handheld pH Meter | Portable pH ORP Meter | Equipped with pH and ORP Electrodes | Accuracy ±0.002 pH, ±0.2 mV | 500 Sets of Data Storage: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61zkpFmLX4L.jpg)
Bante 221 Handheld pH Meter | Portable pH ORP Meter | Equipped with pH and ORP Electrodes | Accuracy ±0.002 pH, ±0.2 mV | 500 Sets of Data Storage: Amazon.com: Industrial & Scientific
![Bante 900P Portable pH/Conductivity/Dissolved Oxygen Meter | Multiparameter Water Quality Meter | for Measuring pH, ORP, Ion, Conductivity, TDS, Salinity, Resistivity, Dissolved Oxygen: Amazon.com: Industrial & Scientific Bante 900P Portable pH/Conductivity/Dissolved Oxygen Meter | Multiparameter Water Quality Meter | for Measuring pH, ORP, Ion, Conductivity, TDS, Salinity, Resistivity, Dissolved Oxygen: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61KpFk4wD4L.jpg)