pH Meters

A pH meter is an instrument designed to measure the hydrogen-ion level in water based solutions. A pH meter indicates the acidity and alkalinity and is sometimes also referred to as a potentiometric pH meter.


A pH meter works by measuring the voltage between two electrodes. The results are displayed by converting this information into a pH value.


The term 'pH' refers to a unit of measure with a range between zero and fourteen. The mathematical symbol 'p' represents potential, while the 'H' is the symbol for hydrogen.


Applications


    Harsh environments

    Biological micro-environments

    Laboratory experimentation

    Quality control

    Agriculture

    Municipal water supplies

    Brewing industry

    Swimming pools

    Food industry

Replacement parts are available, such as pH electrodes made from a special glass composed of alkali metal ions which sense the hydrogen ion concentration. As the electrode ages, the glass electrodes resistance changes.


pH meter calibration is required as electrodes run down eventually and need to be calibrated on a regular basis. Calibration in a pH buffer solution which has a constant pH value should always start with buffer 7.0 as this is point ’zero’. The pH scale has an equivalent mV scale from +420 mV to -420 mV. The buffer solution is available as a pre-mixed liquid or dry powder capsules.


What types of meters are there?


Pocket testers are a device with an LCD display which can deliver fast and accurate readings. They are lightweight and easy to transport making them ideal for field use. Pocket tester meters are popular with students and researchers which they use for measurements in test tubes and vials. Features of a pocket tester meter include automatic buffer recognition, easily replaceable electrodes and thousands of hours of battery life.


Portable pH meters are handheld and lightweight. They contain Bluetooth technology which allows the information to be downloaded to a mobile or tablet. Multi-parameter meters are suited to robust industrial environments and have PC connectivity.


Bench meters are accurate, easy to use and available with Bluetooth technology and built-in printers. It is easy to transfer data via Bluetooth onto a mobile or tablet, or onto a PC via a USB cable.


Test kits measure the strength or weakness of a chemical presence by the degree of colour saturation. If pale then the concentration is low, if strong then the concentration is high. Adding the reagent to the compound allows the colour to be tested against a colour chart.


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Omschrijving Prijs Maximum pH Minimum pH pH Resolution Best pH Accuracy Maximum Temperature Measurement Minimum Temperature Measurement Temperature Measurement Resolution Best Temperature Measurement Accuracy Maximum Conductivity Minimum Conductivity Conductivity Resolution Best Conductivity Accuracy Maximum Oxidation Reduction Potential Minimum Oxidation Reduction Potential
RS-stocknr. 724-3689
FabrikantnummerHI 9813-5N
€ 191,58
Each
Aantal stuks
+14pH 0pH 0.1pH ±0.1pH +60 °C 0°C 0.1°C ±0.5 °C 4mS/cm 0mS/cm 0.01mS/cm ±2% - -
RS-stocknr. 218-970
FabrikantnummerHI-98107
€ 45,32
Each
Aantal stuks
+14pH 0pH 0.1pH ±0.1pH - - - - - - - - - -
RS-stocknr. 410-0902
FabrikantnummerHI98127
€ 90,64
Each
Aantal stuks
+16pH -2pH 0.1pH ±0.1pH +60 °C -5°C 0.1°C ±0.5 °C - - - - - -
RS-stocknr. 214-855
FabrikantnummerHI98103
€ 41,20
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.2pH - - - - - - - - - -
RS-stocknr. 517-5070
FabrikantnummerHI 9812-5
€ 189,04
Each
Aantal stuks
+14pH 0pH 0.1pH ±0.1pH +60 °C 0°C 1°C ±1 °C 1990µS/cm 0µS/cm 10µS/cm ±2% - -
RS-stocknr. 434-2364
FabrikantnummerHI98130
€ 157,59
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.05pH +60 °C 0°C 0.1°C ±0.5 °C 20mS/cm 0mS/cm 0.01mS/cm ±2% - -
RS-stocknr. 327-5033
Fabrikantnummer201020/51-18-07-22-120/837,
FabrikantJumo
€ 156,70
Each
Aantal stuks
+12pH 0pH - - +80 °C -5°C - - - - - - - -
RS-stocknr. 454-6926
FabrikantnummerHI 38018
€ 80,34
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 434-2358
FabrikantnummerHI98129
€ 157,59
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.05pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
RS-stocknr. 410-0918
FabrikantnummerHI-98128
€ 107,12
Each
Aantal stuks
+16pH -2pH 0.01pH ±0.05pH +60 °C -5°C 0.1°C ±0.5 °C - - - - - -
RS-stocknr. 375-1830
FabrikantnummerPRIMO
€ 38,11
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 410-0930
FabrikantnummerHI-991301N
€ 564,44
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 20mS/cm 0mS/cm 0.01mS/cm ±2% - -
RS-stocknr. 724-3677
FabrikantnummerHI 9811-5N
€ 191,58
Each
Aantal stuks
+14pH 0pH 0.1pH ±0.1pH +70 °C 0°C 0.1°C ±0.5 °C 6000µS/cm 0µS/cm 10µS/cm ±2% - -
RS-stocknr. 610-9030
FabrikantnummerHI 83141
€ 283,25
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.01pH +100 °C 0°C 0.1°C ±0.4 °C - - - - +1999mV -1999mV
RS-stocknr. 518-4967
FabrikantnummerHI 83141
€ 398,20
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.01pH +100 °C 0°C 0.1°C ±0.4 °C - - - - +1999mV -1999mV
RS-stocknr. 366-6186
FabrikantnummerHI991300
€ 534,52
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
RS-stocknr. 410-1400
FabrikantnummerHI-991300N
€ 564,44
Each
Aantal stuks
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
RS-stocknr. 387-4400
FabrikantnummerHI2211-02
€ 487,19
Each
Aantal stuks
+16pH -2pH 0.01pH ±0.01pH +120 °C -9.9°C 0.1°C ±0.5 °C - - - - +399.9 mV, +2000 mV -2000 mV, -399.9 mV
RS-stocknr. 726-2696
FabrikantnummerHI-991001N
€ 375,95
Each
Aantal stuks
+16pH -2pH 0.01pH ±0.02pH +105 °C -5°C 0.1°C ±0.5 °C - - - - - -
RS-stocknr. 314-4692
FabrikantnummerHI981402-02
€ 89,61
Each
Aantal stuks
+14pH 0pH 0.1pH ±0.2pH - - - - - - - - - -
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