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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Description Price 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庫存編號 434-2358
製造零件編號HI98129
HK$1,813.25
單位
+14pH 0pH 0.01pH ±0.05pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
RS庫存編號 434-2364
製造零件編號HI98130
HK$1,660.31
單位
+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庫存編號 218-970
製造零件編號HI-98107
HK$612.62
單位
+14pH 0pH 0.1pH ±0.1pH - - - - - - - - - -
RS庫存編號 479-8492
製造零件編號0563 2061
BrandTesto
HK$1,160.10
單位
+14pH 0pH 0.01pH ±0.02pH +60 °C 0°C 0.1°C ±0.4 °C - - - - - -
RS庫存編號 518-4967
製造零件編號HI 83141
HK$3,880.44
單位
+14pH 0pH 0.01pH ±0.01pH +100 °C 0°C 0.1°C ±0.4 °C - - - - +1999mV -1999mV
RS庫存編號 610-9030
製造零件編號HI 83141
HK$2,405.34
單位
+14pH 0pH 0.01pH ±0.01pH +100 °C 0°C 0.1°C ±0.4 °C - - - - +1999mV -1999mV
RS庫存編號 517-5070
製造零件編號HI 9812-5
HK$1,963.78
單位
+14pH 0pH 0.1pH ±0.1pH +60 °C 0°C 1°C ±1 °C 1990µS/cm 0µS/cm 10µS/cm ±2% - -
RS庫存編號 410-1400
製造零件編號HI-991300N
HK$7,094.01
單位
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
RS庫存編號 387-4400
製造零件編號HI2211-02
HK$4,360.00
單位
+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庫存編號 726-2696
製造零件編號HI-991001N
HK$4,077.34
單位
+16pH -2pH 0.01pH ±0.02pH +105 °C -5°C 0.1°C ±0.5 °C - - - - - -
RS庫存編號 366-6186
製造零件編號HI991300
HK$4,787.90
單位
+14pH 0pH 0.01pH ±0.01pH +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
RS庫存編號 410-0902
製造零件編號HI98127
HK$1,231.72
單位
+16pH -2pH 0.1pH ±0.1pH +60 °C -5°C 0.1°C ±0.5 °C - - - - - -
RS庫存編號 434-2370
製造零件編號HI98311
HK$1,353.64
單位
- - - - +60 °C 0°C 0.1°C ±0.5 °C 3999µS/cm 0µS/cm 1µS/cm ±2% - -
RS庫存編號 724-3677
製造零件編號HI 9811-5N
HK$2,712.27
單位
+14pH 0pH 0.1pH ±0.1pH +70 °C 0°C 0.1°C ±0.5 °C 6000µS/cm 0µS/cm 10µS/cm ±2% - -
RS庫存編號 214-855
製造零件編號HI98103
HK$539.34
單位
+14pH 0pH 0.01pH ±0.2pH - - - - - - - - - -
RS庫存編號 410-0918
製造零件編號HI-98128
HK$1,319.64
單位
+16pH -2pH 0.01pH ±0.05pH +60 °C -5°C 0.1°C ±0.5 °C - - - - - -
RS庫存編號 724-3689
製造零件編號HI 9813-5N
HK$2,449.34
單位
+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庫存編號 314-4692
製造零件編號HI981402-02
HK$1,074.85
單位
+14pH 0pH 0.1pH ±0.2pH - - - - - - - - - -
RS庫存編號 410-0930
製造零件編號HI-991301N
HK$6,440.49
單位
+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庫存編號 327-5033
製造零件編號201020/51-18-07-22-120/837,
BrandJumo
HK$1,454.64
單位
+12pH 0pH - - +80 °C -5°C - - - - - - - -