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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Beskrivning Pris 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
RS-artikelnummer 218-970
Tillv. art.nrHI-98107
VarumärkeHanna Instruments
562,90 kr
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+14pH 0pH 0.1pH ±0.1pH - - - - - - - -
RS-artikelnummer 410-0918
Tillv. art.nrHI-98128
VarumärkeHanna Instruments
1 192,02 kr
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+16pH -2pH 0.01pH ±0.05pH +60 °C -5°C 0.1°C ±0.5 °C - - - -
RS-artikelnummer 434-2364
Tillv. art.nrHI98130
VarumärkeHanna Instruments
1 743,88 kr
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+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-artikelnummer 410-0902
Tillv. art.nrHI98127
VarumärkeHanna Instruments
1 004,39 kr
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+16pH -2pH 0.1pH ±0.1pH +60 °C -5°C 0.1°C ±0.5 °C - - - -
RS-artikelnummer 410-0930
Tillv. art.nrHI-991301N
VarumärkeHanna Instruments
6 229,86 kr
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+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-artikelnummer 214-855
Tillv. art.nrHI98103
VarumärkeHanna Instruments
454,73 kr
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+14pH 0pH 0.01pH ±0.2pH - - - - - - - -
RS-artikelnummer 479-8492
Tillv. art.nr0563 2061
VarumärkeTesto
1 375,66 kr
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+14pH 0pH 0.01pH ±0.02pH +60 °C 0°C 0.1°C ±0.4 °C - - - -
RS-artikelnummer 726-2696
Tillv. art.nrHI-991001
VarumärkeHanna Instruments
4 150,00 kr
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+16pH -2pH 0.01pH ±0.02pH +105 °C -5°C 0.1°C ±0.5 °C - - - -
RS-artikelnummer 512-0373
Tillv. art.nr0563 2065
VarumärkeTesto
2 303,42 kr
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+14pH 0pH 0.01pH ±0.02pH +60 °C 0°C 0.1°C ±0.4 °C - - - -
RS-artikelnummer 195-0938
Tillv. art.nrP01710015
VarumärkeChauvin Arnoux
853,12 kr
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14pH 0pH 0.01pH - +60 °C 0°C 0.1°C - - - - -
RS-artikelnummer 434-2358
Tillv. art.nrHI98129
VarumärkeHanna Instruments
1 743,88 kr
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+14pH 0pH 0.01pH ±0.05pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2%
RS-artikelnummer 410-1400
Tillv. art.nrHI-991300N
VarumärkeHanna Instruments
6 229,86 kr
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+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2%
RS-artikelnummer 195-0936
Tillv. art.nrP01710010
VarumärkeChauvin Arnoux
6 217,11 kr
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16pH -2pH 0.01pH - +120 °C -10°C 0.1°C - - - - -
RS-artikelnummer 232-0515
Tillv. art.nr0563 2066
VarumärkeTesto
3 177,87 kr
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- - - - - - - - - - - -
RS-artikelnummer 232-0512
Tillv. art.nr0563 2062
VarumärkeTesto
2 303,42 kr
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14pH 0pH 0.01pH ±0.02pH +60 °C 0°C 0.1°C ±0.4 °C - - - -
RS-artikelnummer 232-0513
Tillv. art.nr0563 2063
VarumärkeTesto
1 119,72 kr
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14pH 0pH 0.01pH ±0.02pH 80 °C 0°C 0.1°C ±0.4 °C - - - -
RS-artikelnummer 327-5033
Tillv. art.nr201020/51-18-07-22-120/837,
VarumärkeJumo
2 128,53 kr
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+12pH 0pH - - +80 °C -5°C - - 5µS/cm 0.1 μS/cm - -
RS-artikelnummer 454-6926
Tillv. art.nrHI 38018
VarumärkeHanna Instruments
886,73 kr
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- - - - - - - - - - - -
RS-artikelnummer 366-6186
Tillv. art.nrHI991300
VarumärkeHanna Instruments
6 236,04 kr
Each
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+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2%