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.
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.
Application Scenarios
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.
Technical parameter
|
Model |
PH-220 |
PH-220B |
PH-220BW |
|
Measuring range |
pH: 0.01-14.0 |
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|
Resolution |
PH: 0.01; Temperature: 0.1°C 1F |
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|
Accuracy |
PH: ±0.01; Temperature: 1°C/2F |
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|
PH calibration |
25°C three-point calibration (4.0 6. 9 9.2) |
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|
Electrode |
Built-in electrode |
External electrode |
|
|
Ambient temperature |
0-50°C (32-122°F) |
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|
Power supply |
4*AAA batteries |
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|
Size |
Φ40*185mm |
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|
Weight |
88g |
||
|
Model |
PH-220 |
PH-220W |
|
Measuring range |
PH: 0.01-14.0 |
|
|
Resolution |
PH: 0.01; Temperature: 0.1°C 1F |
|
|
Accuracy |
PH: ± 0.02; Temperature: 1°C/2F |
|
|
PH calibration |
25℃ three-point calibration |
|
|
Electrode |
Built-in electrode |
External wire electrode |
|
Ambient temperature |
0-50°C (32-122°F) |
|
|
Power supply |
4*AAA batteries |
|
|
Size |
Φ40*185mm |
|
|
Weight |
88g |
|
|
Model |
PH-220BWZ |
PH-220WZ |
|
Measuring range |
PH: 0.01-14.0 |
|
|
Resolution |
PH: 0.01; Temperature: 0.1 °C 1F |
|
|
Accuracy |
PH: ± 0.02; Temperature:1°C/2F |
|
|
PH calibration |
25℃ three-point calibration |
|
|
Ambient temperature |
0-50°C (32-122°F) |
|
|
Power supply |
4*AAA batteries |
|
|
Size |
Φ40*185mm |
|
|
Weight |
88g |
|
Daily Care After Use
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.
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