Handheld PH Pen

Hangzhou Qiwei Instrument Co., Ltd. is one of the leading manufacturers and suppliers of handheld ph pen in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to wholesale bulk handheld ph pen in stock here from our factory. We also accept customized orders.

 

 

 

For regular solvent testing and portable pH measurement, the QiweiLab PH-220 series handheld pH pen is made. Users who need to transport a small tester between sampling locations will find it convenient thanks to its pen-style format. The series offers a product choice for customers who prefer lightweight pH testing to a larger benchtop instrument, including private label brands, distributors of laboratory supplies, resellers of water-testing equipment, and private label brands.

The design specifications for the PH-220, PH-220B, and PH-220BW models are listed in the published product information. Check the most recent product sheet for the specific model, electrode arrangement, calibration procedure, and accessories before placing an order.

 

product key technologies

The working principle of a handheld pH pen is mainly based on electrochemical sensor technology. Its core component is a pH electrode, which typically consists of a glass membrane and a reference electrode. When the electrode is immersed in the test solution, the glass membrane senses the hydrogen ion concentration in the solution and generates a potential difference proportional to that concentration. This potential difference is then converted into a pH value by the instrument's internal circuit and displayed on the screen.

When using a pocket pH pen, operators may check liquid samples from various locations without using a lab workstation. Depending on the anode and operating conditions, program water quality checks, education and training, sample screening, and common laboratory work are some examples.

Take into account more than just the size of a smartphone pH pen when evaluating it. Check whether the screen operates in the intended lighting conditions, whether the electrode is internally connected or publicly connected, and whether the sensing end is secured while being stored.

Include those requirements in your investigation if your target market demands an LCD light, an LCD light, or a particular micro-composite electrode design. Ask QiweiLab to confirm whether each element is recommended or available in the desired PH-220 construction. Do not assume that every type has the same display, power-management, or electrode functions.

1.Laboratory Research: In laboratories such as chemistry, biology, and environmental science, pen-type pH testers are often used to quickly measure the pH value of various solutions, providing accurate data support for experiments.

2.Industrial Production: In industrial production processes such as food, beverages, pharmaceuticals, and chemicals, pH control is critical. Pen-type pH testers can be used to monitor pH values in real time during production, ensuring stable product quality.

3.Water Quality Monitoring: In fields such as environmental monitoring, wastewater treatment, and aquaculture, water quality directly affects ecological balance and human health. Pen-type pH testers can be used to quickly measure the pH value of water bodies, providing a basis for water quality assessment.

4.Agricultural Application: In agriculture, soil pH has a significant impact on crop growth. Pen-type pH testers can be used to measure soil pH, helping farmers rationally adjust soil acidity/alkalinity to improve crop yields.

After finishing measurements, rinse the electrode end using distilled or demineralized water to protect it against corrosion from leftover substances. Use a clean soft cloth to lightly polish the sensing film (glass bulb / composite membrane). Rough rubbing and scratching are strictly prohibited. Do not use paper towels or abrasive materials for cleaning, which may damage the sensitive layer and compromise detection accuracy.

1. Why does the pH reading differ?

Unpredictable readings can result from a dirty or clean electrode, insufficient stability period, contaminated buffer solutions, temperature changes or an unsuitable sample-contact technique. Rinse the anode, inspect the sensing area and repeat the measurement using new, appropriate buffers if needed. If volatility continues, check the anode condition and instrument instructions.

2. Why does the tester neglect calibration?

Second verify that the cushion value matches the selected validation point and that the cushion is not contaminated or expired. Rinse the anode between options and ensure that the detecting end is properly immersed. If the design uses a particular validation sequence, follow its guide rather than applying a process intended for another pH pen.

3. Why is the displayed acidity distinct from the expected value?

Check the validation standing, cushion temperature, test temperature, electrode condition and sample preparation. The pH of a test does change with heat or substance conditions. Do not change the reading just to complement an anticipated result without investigating the measurement conditions.

4. How should I clean the anode after testing?

Rinse the detecting end with filtered or deionized water. If the sample leaves deposits, use a cleansing technique appropriate with the anode and the pollutant. Avoid abrasive linens, paper supplies that may scratch the sensing area and unauthorised solvents. Observe the electrode manufacturer's instructions for hard contamination.

5. How should the electrode be stored?

Use the storeroom method specified for the specific electrode. Some pH electrodes require a dedicated storage answer, while continuous storeroom in pure waters may become inadequate. Keep the safe cap in place when the system is not in use, and prevent allowing the detecting element to dry out if the anode instructions prohibit clean storage.

6. When may I remove the electrode?

Ponder replacement if the electrode has obvious damage, consistently sluggish response, repeated calibration failure or unpredictable readings after suitable cleaning and calibration. Before ordering a alternative, confirm whether your PH-220 design uses a built-in electrode or an outside electrode and examine the exact suitable part.

7. Does every PH-220 type have programmed shut-off and an LCD light?

These functions may be confirmed for the particular model. If programmed power-off or a illuminated screen is required for your target market, ask the supplier to determine the supported model and offer its existing specification.

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