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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Nombre de résultats par page
Description Prix 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
N° de stock RS 410-0902
Référence fabricantHI98127
91,00 €
Each
Unité
+16pH -2pH 0.1pH ±0.1pH +60 °C -5°C 0.1°C ±0.5 °C - - - - - -
N° de stock RS 305-9702
Référence fabricantHI3890
26,78 €
Each
Unité
- - - - - - - - - - - - - -
N° de stock RS 434-2364
Référence fabricantHI98130
158,00 €
Each
Unité
+14pH 0pH 0.01pH ±0.05pH +60 °C 0°C 0.1°C ±0.5 °C 20mS/cm 0mS/cm 0.01mS/cm ±2% - -
N° de stock RS 218-970
Référence fabricantHI-98107
51,00 €
Each
Unité
+14pH 0pH 0.1pH ±0.1pH - - - - - - - - - -
N° de stock RS 724-3689
Référence fabricantHI 9813-5N
191,58 €
Each
Unité
+14pH 0pH 0.1pH ±0.1pH +60 °C 0°C 0.1°C ±0.5 °C 4mS/cm 0mS/cm 0.01mS/cm ±2% - -
N° de stock RS 434-2358
Référence fabricantHI98129
158,00 €
Each
Unité
+14pH 0pH 0.01pH ±0.05pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
N° de stock RS 410-1400
Référence fabricantHI-991300N
564,44 €
Each
Unité
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
N° de stock RS 214-855
Référence fabricantHI98103
41,20 €
Each
Unité
+14pH 0pH 0.01pH ±0.2pH - - - - - - - - - -
N° de stock RS 410-0918
Référence fabricantHI-98128
108,00 €
Each
Unité
+16pH -2pH 0.01pH ±0.05pH +60 °C -5°C 0.1°C ±0.5 °C - - - - - -
N° de stock RS 366-6186
Référence fabricantHI991300
565,00 €
Each
Unité
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
N° de stock RS 387-4400
Référence fabricantHI2211-02
487,00 €
Each
Unité
+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
N° de stock RS 517-5070
Référence fabricantHI 9812-5
191,32 €
Each
Unité
+14pH 0pH 0.1pH ±0.1pH +60 °C 0°C 1°C ±1 °C 1990µS/cm 0µS/cm 10µS/cm ±2% - -
N° de stock RS 518-4967
Référence fabricantHI 83141
403,03 €
Each
Unité
+14pH 0pH 0.01pH ±0.01pH +100 °C 0°C 0.1°C ±0.4 °C - - - - +1999mV -1999mV
N° de stock RS 610-9030
Référence fabricantHI 83141
283,25 €
Each
Unité
+14pH 0pH 0.01pH ±0.01pH +100 °C 0°C 0.1°C ±0.4 °C - - - - +1999mV -1999mV
N° de stock RS 327-5033
Référence fabricant201020/51-18-07-22-120/837,
MarqueJumo
163,92 €
Each
Unité
+12pH 0pH - - +80 °C -5°C - - 5µS/cm 0.1 μS/cm - - - -
N° de stock RS 454-6926
Référence fabricantHI 38018
80,34 €
Each
Unité
- - - - - - - - - - - - - -
N° de stock RS 410-0930
Référence fabricantHI-991301N
564,44 €
Each
Unité
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 20mS/cm 0mS/cm 0.01mS/cm ±2% - -
N° de stock RS 195-0936
Référence fabricantP01710010
550,00 €
Each
Unité
16pH -2pH 0.01pH - +120 °C -10°C 0.1°C - - - - - - -
N° de stock RS 512-0373
Référence fabricant0563 2065
MarqueTesto
209,00 €
Each
Unité
+14pH 0pH 0.01pH ±0.02pH +60 °C 0°C 0.1°C ±0.4 °C - - - - - -
N° de stock RS 726-2696
Référence fabricantHI-991001N
376,00 €
Each
Unité
+16pH -2pH 0.01pH ±0.02pH +105 °C -5°C 0.1°C ±0.5 °C - - - - - -