A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode, and so the pH meter is sometimes referred to as a "potentiometric pH meter". The difference in electrical potential relates to the acidity or pH of the solution. The pH meter is used in many applications ranging from laboratory experimentation to quality control
![Hach HQ2100 [LEV015.53.21003] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable](image/cache/wp/gj/Products/Hach_LEV015.53.21003-200x200.webp "Hach HQ2100 [LEV015.53.21003] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable")
![Hach HQ2100 [LEV015.53.21003] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable](image/cache/wp/gj/Products/Hach_HQ1140-200x200.webp "Hach HQ2100 [LEV015.53.21003] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable")
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Rp.74,647,200
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![Hach HQ2100 [LEV015.53.21002] Portable Multi-Meter with Gel pH Electrode PHC101, 1 m Cable](image/cache/wp/gj/Products/Hach_LEV015.53.21002-200x200.webp "Hach HQ2100 [LEV015.53.21002] Portable Multi-Meter with Gel pH Electrode PHC101, 1 m Cable")
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Rp.59,748,000
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![Hach HQ2100 [LEV015.53.21001] Portable Multi-Meter with Gel pH Electrode PHC201, 1 m Cable](image/cache/wp/gj/Products/Hach_LEV015.53.21001-200x200.webp "Hach HQ2100 [LEV015.53.21001] Portable Multi-Meter with Gel pH Electrode PHC201, 1 m Cable")
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Rp.58,160,800
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![Hach HQ1110 [LEV015.53.11103] Portable Dedicated pH/ORP/mV Meter with Rugged Field Gel pH Electrode, 5 m Cable](image/cache/wp/gj/Products/Hach_LEV015.53.11103-200x200.webp "Hach HQ1110 [LEV015.53.11103] Portable Dedicated pH/ORP/mV Meter with Rugged Field Gel pH Electrode, 5 m Cable")
![Hach HQ1110 [LEV015.53.11103] Portable Dedicated pH/ORP/mV Meter with Rugged Field Gel pH Electrode, 5 m Cable](image/cache/wp/gj/Products/Hach_HQ1110-200x200.webp "Hach HQ1110 [LEV015.53.11103] Portable Dedicated pH/ORP/mV Meter with Rugged Field Gel pH Electrode, 5 m Cable")
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Rp.65,815,200
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![Hach HQ1110 [LEV015.53.11102] Portable Dedicated pH/ORP/mV Meter with Gel pH Electrode, 1 m Cable](image/cache/wp/gj/Products/Hach_LEV015.53.11102-200x200.webp "Hach HQ1110 [LEV015.53.11102] Portable Dedicated pH/ORP/mV Meter with Gel pH Electrode, 1 m Cable")
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Rp.51,095,200
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![Hach HQ1110 [LEV015.53.11101] Portable Dedicated pH/ORP/mV Meter with Gel pH Electrode PHC201, 1 m Cable](image/cache/wp/gj/Products/Hach_LEV015.53.11101-200x200.webp "Hach HQ1110 [LEV015.53.11101] Portable Dedicated pH/ORP/mV Meter with Gel pH Electrode PHC201, 1 m Cable")
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Rp.49,661,600
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Rp.29,053,600
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![Hach HQ2200 [LEV015.53.22009] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable](image/cache/wp/gj/Products/Hach_LEV015.53.22009-200x200.webp "Hach HQ2200 [LEV015.53.22009] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable")
![Hach HQ2200 [LEV015.53.22009] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable](image/cache/wp/gj/Products/Hach_HQ2200-port-200x200.webp "Hach HQ2200 [LEV015.53.22009] Portable Multi-Meter with Rugged Field Gel pH Electrode, 5 m Cable")
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Rp.84,477,600
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![Hach HQ2200 [LEV015.53.22006] Portable Multi-Meter with pH and Dissolved Oxygen Electrodes, 5 m Rugged Cables](image/cache/wp/gj/Products/Hach_LEV015.53.22006-200x200.webp "Hach HQ2200 [LEV015.53.22006] Portable Multi-Meter with pH and Dissolved Oxygen Electrodes, 5 m Rugged Cables")
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Rp.115,812,000
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![Hach HQ2200 [LEV015.53.22005] Portable Multi-Meter with pH and Dissolved Oxygen Electrodes, 1 m Cables](image/cache/wp/gj/Products/Hach_LEV015.53.22005-200x200.webp "Hach HQ2200 [LEV015.53.22005] Portable Multi-Meter with pH and Dissolved Oxygen Electrodes, 1 m Cables")
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Rp.96,151,200
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![Hach HQ2200 [LEV015.53.22002] Portable Multi-Meter with pH and Conductivity Electrodes, 5 m Rugged Cables](image/cache/wp/gj/Products/Hach_LEV015.53.22002-200x200.webp "Hach HQ2200 [LEV015.53.22002] Portable Multi-Meter with pH and Conductivity Electrodes, 5 m Rugged Cables")
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Rp.113,866,400
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![Hach HQ2200 [LEV015.53.22003] Portable Multi-Meter with pH and Conductivity Electrodes, 1 m Cables](image/cache/wp/gj/Products/Hach_LEV015.53.22003-200x200.webp "Hach HQ2200 [LEV015.53.22003] Portable Multi-Meter with pH and Conductivity Electrodes, 1 m Cables")
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Rp.85,834,400
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