pH Meters

A pH meter or pH meter is a scientific instrument that measures the activity of the hydrogen ion in aqueous solutions, indicating its degree of acidity or alkalinity expressed as pH. The pH meter measures the difference in electrical potential between a pH electrode and a reference electro...

A pH meter or pH meter is a scientific instrument that measures the activity of the hydrogen ion in aqueous solutions, indicating its degree of acidity or alkalinity expressed as pH. The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode. This difference in electrical potential is related to the acidity or pH of the solution. The pH meter is used in many applications ranging from laboratory experimentation to quality control.

The pH meter is used in all those areas where it is important to detect this value. These areas are laboratories, industrial facilities and swimming pools. Above all, in private pools, located outside, it is necessary to control the pH value. This value indicates how acidic or alkaline the water is. The ideal value of a swimming pool is between 7 and 7.4 pH. Any value that deviates from this optimal value influences the quality of the water. The values that are measured with our pH meter influence the effectiveness of the water disinfection media.

In addition, a pH value that deviates a lot can cause damage to materials and the human body. If the value is too low, it can cause leakage damage or corrosion in metals. If the value is too high it can cause itching in the skin, because it is damaging the protective layer of our skin. You can purchase the pH meter in our

Operation of the pH-meter

Potentiometric pH meters measure the voltage between two electrodes and display the result converted to the corresponding pH value. It consists of a simple electronic amplifier and a pair of electrodes, or alternatively a combination electrode, and some kind of display calibrated in pH units. It usually has a glass electrode and a reference electrode, or a combination electrode. The electrodes, or probes, are inserted into the solution to be tested.

The design of the electrodes is the key part: These are rod structures, usually made of glass, with a bulb containing the sensor at the bottom. The glass electrode for measuring pH has a glass bulb specifically designed to be selective to the concentration of hydrogen ions. In immersion in the solution to be tested, the hydrogen ions in the test solution are exchanged for other positively charged ions in the glass bulb, creating an electrochemical potential through the bulb. The electronic amplifier detects the difference in electrical potential between the two electrodes generated in the measurement and converts the potential difference into pH units.

Types of pH Meters

pH meters range from simple and inexpensive pen-type devices, to complex and expensive laboratory instruments, with computer interfaces and various inputs for indicator and temperature measurements that must be introduced to adjust pH variation. The output can be digital or analog, and the devices can be powered by batteries or rely on line power.

Special meters and probes are available for use in special applications, such as harsh environments and biological microenvironments. There are also holographic pH sensors, which allow the measurement of pH colorimetrically, making use of the variety of pH indicators that are available. Additionally, there are commercially available pH meters based on solid-state electrodes, rather than conventional glass electrodes.

Calibration and Maintenance

Very precise measurements require the pH meter to be calibrated before each measurement. More typically, calibration is performed once a day of operation. Calibration is necessary because the glass electrode does not provide reproducible electrostatic potentials for extended periods of use times.

Calibration is performed with at least two standard buffer solutions that cover the range of pH values to be measured. For general purposes, buffers at pH 4.00 and pH 10.00 are appropriate. The pH meter has a calibration control to set the meter reading equal to the value of the first standard damper and a second control that is used to adjust the meter reading to the value of the second damper. A third control allows you to adjust the temperature. More accurate measurements sometimes require calibration to three different pH values.

Good laboratory practice dictates that after each measurement the probes are rinsed with distilled water to remove any trace of the solution being measured, cleaned to absorb the remaining water that could dilute the sample and thus alter the reading.

 

 

pH-meter PCE-HM 12 pH-meter PCE-HM 12

PCE-PH 12

pH Meters

pH-meter PCE-HM 12

The pH-meter is a handheld device to quickly and easily measure the pH value in a range of 0 to 14 and the temperature in a range of 0 to...
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pdf 3328245.pdf

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pH-meter PCE-PH 228-ICA incl. ISO calibration certificate pH-meter PCE-PH 228-ICA incl. ISO calibration certificate

PCE-PH 228-ICA

pH Meters

pH-meter PCE-PH 228-ICA incl. ISO calibration certificate

This high-end pH-meter is synonymous with precision, easy handling and conforms to the Good Laboratory Practices (BPL). The pH-meter...
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pdf 2859047.pdf

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€725.88 (inc. VAT)
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pH-meter PCE-HUH 25 pH-meter PCE-HUH 25

PCE-PH 25

pH Meters

pH-meter PCE-HUH 25

The pH-meter offers the user a wide range of measurements. In addition to determining pH value, pH-meter also measures conductivity, dry...
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pdf 2322425.pdf

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pH-meter PCE-H 26F pH-meter PCE-H 26F

PCE-PH 26F

pH Meters

pH-meter PCE-H 26F

The digital pH-meter is used to measure the pH value of viscous media. Thanks to the flat electrode construction, this pH-meter is ideal...
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pdf 2322413.pdf

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pH-meter PCE-PH 26F-ICA incl. ISO calibration certificate pH-meter PCE-PH 26F-ICA incl. ISO calibration certificate

PCE-PH 26F-ICA

pH Meters

pH-meter PCE-PH 26F-ICA incl. ISO calibration certificate

The digital pH-meter is used to measure the pH value of viscous media. Thanks to the flat electrode construction, this pH-meter is ideal...
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pdf 2322414.pdf

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pH-meter PCE-PH 28L-ICA incl. ISO calibration certificate pH-meter PCE-PH 28L-ICA incl. ISO calibration certificate

PCE-PH 28L-ICA

pH Meters

pH-meter PCE-PH 28L-ICA incl. ISO calibration certificate

The digital pH-meter is equipped with a flat membrane electrode. The electrode of the digital pH-meter is elongated. Thus you can enter...
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pdf 2314317.pdf

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€368.93 (inc. VAT)
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PH 12 calibration solution PCE-PH12-500

PCE-PH12-500

pH Meters

PH 12 calibration solution PCE-PH12-500

PH 12 calibration solution- Value EC: @25°C / pH 12 ±0.05- Size: 500 mL - Packaging: 1 bottle - Certificate of analysis: Yes
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pH-meter PCE-PH20M-ICA incl. ISO calibration certificate pH-meter PCE-PH20M-ICA incl. ISO calibration certificate

PCE-PH20M-ICA

pH Meters

pH-meter PCE-PH20M-ICA incl. ISO calibration certificate

The pH-meter is an easy-to-manage handheld device for the feeding sector. The large screen that has the pH-meter allows easy reading of...
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€580.68 (inc. VAT)
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pH-meter PCE-PH20M-IR 80-KIT for the food sector pH-meter PCE-PH20M-IR 80-KIT for the food sector

PCE-PH20M-IR 80-KIT

pH Meters

pH-meter PCE-PH20M-IR 80-KIT for the food sector

The pH-meter is an easy-to-manage handheld device for the feeding sector. The large screen that has the pH-meter allows easy reading of...
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pdf 2310517.pdf

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€587.94 (inc. VAT)
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pH-meter PCE-PH20P-ICA incl. ISO calibration certificate pH-meter PCE-PH20P-ICA incl. ISO calibration certificate

PCE-PH20P-ICA

pH Meters

pH-meter PCE-PH20P-ICA incl. ISO calibration certificate

The measurement of pH in the cosmetics is to perform checks with the priority, not only to check that the pH value of the product is...
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pdf 2323784.pdf

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pH-meter PCE-PH20S-ICA incl. ISO calibration certificate pH-meter PCE-PH20S-ICA incl. ISO calibration certificate

PCE-PH20S-ICA

pH Meters

pH-meter PCE-PH20S-ICA incl. ISO calibration certificate

This soil pH-meter has been developed to directly determine the pH value of the soil. With the help of the pH-meter it is possible to...
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pdf 2323716.pdf

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€249.14 (inc. VAT)
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PH 2 calibration solution PCE-H2-500

PCE-PH2-500

pH Meters

PH 2 calibration solution PCE-H2-500

PH 2 calibration solution- EC value: @25°C / pH 2 ±0,015- Size: 500 mL - Packaging: 1 bottle - Certificate of analysis: Yes
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pH-meter PCE-PHD-1-KIT1 pH-meter PCE-PHD-1-KIT1

PCE-PHD-1-KIT1

pH Meters

pH-meter PCE-PHD-1-KIT1

The pH-meter is a multiparametric equipment for water quality inspection. The portable pH-meter controls pH values, conductivity,...
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pdf 2323795.pdf

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€723.46 (inc. VAT)
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pH-meter PCE-PHM 12-ICA incl. ISO calibration certificate pH-meter PCE-PHM 12-ICA incl. ISO calibration certificate

PCE-PHM 12-ICA

pH Meters

pH-meter PCE-PHM 12-ICA incl. ISO calibration certificate

The pH-meter has been specially designed to measure pH value in aquariums. The aquarium pH-meter can be connected to a universal mounting...
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