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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Detalii produs Marca Stock Maximum pH Minimum pH Substances Tested pH Resolution Number of Tests Best pH Accuracy Sample Size Maximum Temperature Measurement Kit Contents Minimum Temperature Measurement Maximum Measurement Temperature Measurement Resolution Best Temperature Measurement Accuracy Maximum Conductivity Minimum Conductivity Conductivity Resolution Maximum Oxidation Reduction Potential Minimum Oxidation Reduction Potential Maximum Operating Temperature Best Oxidation Reduction Potential Resolution Power Source Oxidation Reduction Potential Range Minimum Operating Temperature Oxidation Reduction Potential Accuracy Model Number p Dimensions Length Weight Battery Life Height Width Battery Type Maximum Total Dissolved Solids Total Dissolved Solids Resolution Minimum Total Dissolved Solids
Hanna Instruments pH Meter, 0 → +14 pH HI98103 Hanna Instruments 136 +14pH 0pH - 0.01pH - ±0.2pH - - - - - - - - - - - - +50°C - Battery - 0°C - CHECKER1 66 x 50 x 25mm 66mm 50g 3000 h 25mm 50mm PR44 x 2 - - -
Hanna Instruments pH Meter, 0 → 1990 μS/cm, 0 → +14 pH HI 9812-5 Hanna Instruments 75 +14pH 0pH - 0.1pH - ±0.1pH - +60 °C - 0°C - 1°C ±1 °C 1990µS/cm 0µS/cm 10µS/cm - - +50°C - Battery - 0°C - HI 9812-5 165 x 75 x 45mm 165mm 180g 150 h 45mm 75mm 9V 1990ppm 10ppm 0ppm
Hanna Instruments pH Meter, -2 → +16 pH HI98127 Hanna Instruments 70 +16pH -2pH - 0.1pH - ±0.1pH - +60 °C - -5°C - 0.1°C ±0.5 °C - - - - - +50°C - Battery - -5°C - HI 98127 163 x 40 x 26mm 163mm 100g 300 h 26mm 40mm Button Cell (1.5 V) x 4 - - -
Hanna Instruments pH Meter, 0 → +14 pH HI-98107 Hanna Instruments 69 +14pH 0pH - 0.1pH - ±0.1pH - - - - - - - - - - - - +50°C - Battery - 0°C - HI 98107 175 x 41 x 23mm 175mm 95g 700 h 23mm 41mm Button Cell (1.5 V) x 4 - - -
Hanna Instruments pH Meter, 0 → 3999 μS/cm, 0 → +14 pH HI98129 Hanna Instruments 67 +14pH 0pH - 0.01pH - ±0.05pH - +60 °C - 0°C - 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm - - +50°C - Battery - 0°C - HI 98129 163 x 40 x 26mm 163mm 100g 100 h 26mm 40mm Button Cell (1.5 V) x 4 2000ppm 1ppm 0ppm
Hanna Instruments pH Meter, -2 → +16 pH HI-98128 Hanna Instruments 49 +16pH -2pH - 0.01pH - ±0.05pH - +60 °C - -5°C - 0.1°C ±0.5 °C - - - - - +50°C - Battery - -5°C - HI 98128 163 x 40 x 26mm 163mm 100g 300 h 26mm 40mm Button Cell (1.5 V) x 4 - - -
Alkalinity test kit Hanna Instruments 35 - - Alkalinity - 110 - 5ml - Bromophenol Blue Indicator, Calibrated Syringe with Tip, Calibrated Vessels, Phenolpthtalein Indicator (10 ml) - 300mg/L - - - - - - - - - - - - - - - - - - - - - - - -
Hanna Instruments pH Meter, 0 → 20 mS/cm, 0 → +14 pH HI98130 Hanna Instruments 28 +14pH 0pH - 0.01pH - ±0.05pH - +60 °C - 0°C - 0.1°C ±0.5 °C 20mS/cm 0mS/cm 0.01mS/cm - - +50°C - Battery - 0°C - HI 98130 163 x 40 x 26mm 163mm 100g 100 h 26mm 40mm Button Cell (1.5 V) x 4 10ppt 0.01ppt 0ppt
Hanna Instruments pH Meter, 0 → 6000 μS/cm, 0 → +14 pH HI 9811-5N Hanna Instruments 27 +14pH 0pH - 0.1pH - ±0.1pH - +70 °C - 0°C - 0.1°C ±0.5 °C 6000µS/cm 0µS/cm 10µS/cm - - +50°C - Battery - 0°C - HI 9811-5N 145 x 80 x 36mm 145mm 230g 150 h 36mm 80mm 9V 3000mg/L 10mg/L 0mg/L
Hanna Instruments pH Meter, 0 → 3999 μS/cm HI98311 Hanna Instruments 15 - - - - - - - +60 °C - 0°C - 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm - - +50°C - Battery - 0°C - HI 98311 163 x 40 x 26mm 163mm 100g 100 h 26mm 40mm Button Cell (1.5 V) x 4 2000ppm 1ppm 0ppm
Hanna Instruments pH Meter, 0 → +14 pH HI 83141 Hanna Instruments 12 +14pH 0pH - 0.01pH - ±0.01pH - +100 °C - 0°C - 0.1°C ±0.4 °C - - - +1999mV -1999mV +50°C 1mV Battery ±1999 mV 0°C ±1mV HI 83141 164 x 76 x 45mm 164mm 180g 100 h 45mm 76mm 9V - - -
Hanna Instruments pH Meter, 0 → 4 mS/cm, 0 → +14 pH HI 9813-5N Hanna Instruments 9 +14pH 0pH - 0.1pH - ±0.1pH - +60 °C - 0°C - 0.1°C ±0.5 °C 4mS/cm 0mS/cm 0.01mS/cm - - +50°C - Battery - 0°C - HI 9813-5N 165 x 75 x 45mm 165mm 180g 150 h 45mm 75mm 9V 1999ppm 1ppm 0ppm
Testo pH Meter, 0 → +14 pH 0563 2061 Testo 8 +14pH 0pH - 0.01pH - ±0.02pH - +60 °C - 0°C - 0.1°C ±0.4 °C - - - - - +60°C - Battery - 0°C - Testo 206 pH1 197 x 33 x 20mm 197mm 69g 80 h 20mm 33mm CR2032 - - -
Hanna Instruments pH Meter PRIMO Hanna Instruments 7 - - - - - - - - - - - - - - - - - - +50°C - Battery - 0°C - PRIMO 180 x 50 x 25mm 180mm 50g 200 h 25mm 50mm Button Cell (1.5 V) x 2 1999ppm 1ppm -
Hanna Instruments pH Meter, 0 → +14 pH HI981402-02 Hanna Instruments 5 +14pH 0pH - 0.1pH - ±0.2pH - - - - - - - - - - - - +50°C - Mains - 0°C - HI 981402 86 x 110 x 43mm 86mm 150g - 43mm 110mm - - - -
Hanna Instruments pH Meter, 0 → 20 mS/cm, 0 → +14 pH HI-991301N Hanna Instruments 5 +14pH 0pH - 0.01pH - ±0.01pH - +60 °C - 0°C - 0.1°C ±0.5 °C 20mS/cm 0mS/cm 0.01mS/cm - - +50°C - Battery - 0°C - HI 991301 150 x 80 x 36mm 150mm 210g 500 h 36mm 80mm AAA 10ppt 0.01ppt 0ppt
Hanna Instruments pH Meter, 0 → 3999 μS/cm, 0 → +14 pH HI-991300N Hanna Instruments 5 +14pH 0pH - 0.01pH - ±0.01pH - +60 °C - 0°C - 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm - - +50°C - Battery - 0°C - HI 991300 150 x 80 x 36mm 150mm 210g 500 h 36mm 80mm AAA 2000ppm 1ppm 0ppm
Jumo pH Meter, 0 → +12 pH 201020/51-18-07-22-120/837,
  • Nr. Stoc RS 327-5033
  • Marca Jumo
  • Cod Producator 201020/51-18-07-22-120/837,
Jumo 3 +12pH 0pH - - - - - +80 °C - -5°C - - - - - - - - +80°C - - - -5°C - 201020/51-10-07-21-120/837 - - - - - - - - - -
ANALYSE DE CHLORE Hanna Instruments 2 - - Cl - 200 - 10ml - Checker Disc, Chlorine Reagent, Demineralizer Bottle with Filter Cap, Glass Vials, Pipette - 3.5mg/L - - - - - - - - - - - - - - - - - - - - - - - -
Hanna Instruments pH Meter, 0 → +14 pH HI 83141 Hanna Instruments 1 +14pH 0pH - 0.01pH - ±0.01pH - +100 °C - 0°C - 0.1°C ±0.4 °C - - - +1999mV -1999mV +50°C 1mV Battery ±1999 mV 0°C ±1mV HI 83141 164 x 76 x 45mm 164mm 180g 100 h 45mm 76mm 9V - - -
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