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 HQ40D [8505400] Portable pH & Luminescent Dissolved Oxygen Meter, Premium Field Kit w/ 5m Cable](image/cache/wp/gj/Products/Hach_HQ40D-8505400-200x200.webp "Hach HQ40D [8505400] Portable pH & Luminescent Dissolved Oxygen Meter, Premium Field Kit w/ 5m Cable")
Brand: Hach
Hach HQ40D [8505400] Portable pH & Luminescent Dissolved Oxygen Meter, Premium Field Kit w/ 5m Cable
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Rp.92,700,0000
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![Hach HQ40D [8507200] Portable pH and ORP/mV Meter, Laboratory Kit w/ 1m Cable](image/cache/wp/gj/Products/Hach_HQ40D-8507200-200x200.webp "Hach HQ40D [8507200] Portable pH and ORP/mV Meter, Laboratory Kit w/ 1m Cable")
Brand: Hach
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Rp.63,950,0000
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![Hach HQ40D [8507100] Portable pH and ORP/mV Meter, Laboratory Kit w/ 1m Cable](image/cache/wp/gj/Products/Hach_HQ40D-8507100-200x200.webp "Hach HQ40D [8507100] Portable pH and ORP/mV Meter, Laboratory Kit w/ 1m Cable")
Brand: Hach
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Rp.69,500,0000
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![Hach HQ40D [8506400] Portable pH Meter, Laboratory Kit w/ 1m Cable](image/cache/wp/gj/Products/Hach_HQ40D-8506400-200x200.webp "Hach HQ40D [8506400] Portable pH Meter, Laboratory Kit w/ 1m Cable")
Brand: Hach
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Rp.56,700,0000
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![Hach HQ40D [8507550] pH and ORP Meter, Laboratory Kit w/ 1m Cable](image/cache/wp/gj/Products/Hach_HQ40D-8507550-200x200.webp "Hach HQ40D [8507550] pH and ORP Meter, Laboratory Kit w/ 1m Cable")
Brand: Hach
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Rp.60,500,0000
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![Hach HQ11D [HQ11D53153000] pH Meter with Refill pH Electrode, 5m Cable](image/cache/wp/gj/Products/Hach_HQ11D53151000-200x200.webp "Hach HQ11D [HQ11D53153000] pH Meter with Refill pH Electrode, 5m Cable")
Brand: Hach
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Rp.31,500,0000
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Brand: Hach
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Rp.30,500,0000
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![Hach HQ30D [HQ30D53103000] Portable pH-Meter with Gel pH Electrode, 3 m Cable](image/cache/wp/gj/Products/Hach-HQ30D-HQ30D53103000-200x200.webp "Hach HQ30D [HQ30D53103000] Portable pH-Meter with Gel pH Electrode, 3 m Cable")
Brand: Hach
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Rp.36,500,0000
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![Hach HQ440D [HQ440D.98.00012] Two-Channel pH / ORP / Conductivity / DO (LDO) without Probes](image/cache/wp/gj/Products/Hach_HQ440D-1-200x200.webp "Hach HQ440D [HQ440D.98.00012] Two-Channel pH / ORP / Conductivity / DO (LDO) without Probes")
Brand: Hach
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Rp.59,700,0000
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![Hach HQ440D [HQ440D.98.00002] Two-Channel pH / ORP / Conductivity / DO (LDO) without Probes](image/cache/wp/gj/Products/Hach_HQ440D-200x200.webp "Hach HQ440D [HQ440D.98.00002] Two-Channel pH / ORP / Conductivity / DO (LDO) without Probes")
Brand: Hach
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Rp.59,700,0000
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![Global Water WQ201 [DB0000] pH Sensor w/ 25 ft. Cable](image/cache/wp/gj/Products/Global-Water_WQ201-DB0000-200x200.webp "Global Water WQ201 [DB0000] pH Sensor w/ 25 ft. Cable")
Brand: Global Water
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Rp.27,500,0000
Ex Tax:Rp.27,500,0000
![General Tools WK-7200 [WK7200] Complete Waterproof Self Calibrating Micro Processor Kit](image/cache/wp/gj/Products/General-Tools_WK7200-200x200.webp "General Tools WK-7200 [WK7200] Complete Waterproof Self Calibrating Micro Processor Kit")
![General Tools WK-7200 [WK7200] Complete Waterproof Self Calibrating Micro Processor Kit](image/cache/wp/gj/Products/General-Tools_%20CO502-1-200x200.webp "General Tools WK-7200 [WK7200] Complete Waterproof Self Calibrating Micro Processor Kit")
Brand: General Tools
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Rp.6,500,0000
Ex Tax:Rp.6,500,0000
