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. Results are shown after 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.

Different Types of pH Meters

Pocket testers

Pocket testers are pH devices with an LCD display which can deliver fast and accurate values. They are lightweight and easy to transport, making them ideal for field use. Pocket tester meters are popular with students and researchers, and they are used for measurements in test tubes and vials. Features of an electronic pocket tester meter include automatic buffer recognition, easily replaceable electrodes and thousands of hours of battery life.

Portable pH meters

Portable pH meters are handheld and lightweight. These pH readers 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

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

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.

pH Meters Applications

• Harsh environments: pH meters are designed to withstand extreme conditions, providing accurate readings in challenging environments like industrial settings and chemical plants.
• Biological micro-environments: In delicate biological systems, pH meters ensure precise measurement to monitor and maintain optimal conditions for cell cultures and other sensitive applications.
• Laboratory experimentation: Essential for precise scientific research, pH meters in labs help scientists achieve accurate results in various experiments and analyses.
• Quality control: Just like air quality testers, which are used to test air quality, industries use pH meters to monitor and maintain product quality by ensuring that the pH levels meet specific standards.
• Agriculture: Farmers use pH meters to test soil and nutrient solutions, optimising plant growth and ensuring effective use of fertilisers.
• Municipal water supplies: pH meters are crucial for monitoring and managing the pH levels in drinking water, ensuring it is safe and meets health standards.
• Brewing industry: Brewers use pH meters to control the acidity of ingredients and the final product, which is crucial for achieving the desired taste and quality in beverages.
• Swimming pools: Maintaining proper pH levels in swimming pools ensures water safety and comfort for swimmers, and prevents equipment damage.
• Food industry: pH meters are used in the food industry to ensure product safety, quality, and consistency by monitoring acidity levels during production and processing.

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 electrode 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 in pre-mixed liquid or dry powder capsules.

How to Choose the Right pH Meters?

When choosing the right pH meter, consider factors such as accuracy, range, and ease of calibration. Look for features like automatic temperature compensation and durability, especially if you need these pH detectors for various environments or frequent use.

If you are looking for high-quality pH meters, explore our selection at RS HK. We offer a diverse range of pH meters that meet stringent standards, ensuring you receive precise and reliable instruments. Our dedication to quality is matched by exceptional customer support and detailed product information, making it easy to find the perfect pH meter for your needs.

How to Order pH Meters from RS?

When it comes to offering high-quality pH meters, RS HK is a trusted supplier. You can buy from top brands such as Extech, Testo, Endress+Hauser and more. To place your order, you can visit our online platform or directly call us at 852 2421 9898. We will try to ensure quick delivery, as fast as the next day, or you can also opt for collection at your local branch.

You can also set up a blanket order if you need pH meters frequently. This way, you can manage multiple orders under a single number with a fixed spend limit. Get in touch with us to set up this service and track your transactions efficiently.

How Delivery Works at RS HK?

At RS HK, we offer flexible delivery options to meet your needs when it comes to delivering pH meters. We strive to ensure prompt delivery of your orders, with services tailored to your schedule.

Besides this, you can opt for flexible delivery with an additional delivery charge. Our delivery charges depend on the amount of your order. For more information about delivery timings and charges, please visit our delivery information page.