PH Digital Meter Pen

The Digital pH Meter Pen is a professional yet affordable instrument designed for fast, accurate, and reliable pH measurement of liquids in a wide range of applications. Whether you're maintaining a healthy aquarium, balancing pool chemistry, monitoring a hydroponic nutrient solution, or running quality checks in a food or beverage process, this pocket-sized pH meter delivers laboratory-grade accuracy in a portable package.

The meter features an advanced Korean glass-bulb electrode that provides a sensitive, direct contact reading with the tested solution — ensuring quick stabilization and high accuracy. Built-in 2-point automatic calibration with automatic identification of standard buffer solutions makes calibration effortless, completing in just 5 seconds.

One of the standout features is automatic temperature compensation (ATC). Since the pH of a solution naturally varies with temperature, this meter automatically adjusts its reading for the current temperature, eliminating one of the most common sources of measurement error. You can confidently take readings in cold water, room-temperature samples, or warm liquids up to 80°C without manual correction.

The large LCD display provides easy-to-read pH values, and the waterproof construction allows the meter to handle accidental splashes and immersion of the electrode — perfect for fieldwork, poolside testing, and aquarium maintenance.

Using the meter is simple:

1. Remove the protective cap
2. Immerse the electrode in the solution
3. Press the button and read the displayed value

That's it — fast, accurate, and reliable measurements every time.

Specifications

• Condition: 100% Brand New
• Measuring Range: 0.00 to 14.00 pH
• Accuracy: ±0.01 pH
• Resolution: 0.01 pH
• Operating Temperature: 0°C to 80°C
• Probe Type: Glass bulb electrode (Korean-made)
• Calibration: 2-Point Automatic Calibration
• Temperature Compensation: Automatic (ATC)
• Display: Large LCD with waterproof construction
• Power Supply: 2 × 1.5V batteries (NOT included)
• Dimensions: Approximately 155 × 29 × 16 mm (6.1 × 1.1 × 0.6 inches)
• Package Weight: Approximately 88 grams
• Form Factor: Pocket-sized handheld pen

How to Use

1. Remove the protective cap covering the electrode
2. Power on the meter using the on/off button
3. Immerse the electrode into the solution to be tested (only the lower portion, not the entire device)
4. Gently stir the electrode in the solution for a few seconds
5. Wait for the reading to stabilize on the LCD display
6. Read the pH value directly from the screen
7. After use, rinse the electrode with clean (preferably distilled) water and replace the protective cap

Calibration Procedure

1. Power on the meter and immerse the electrode in a standard buffer solution (typically pH 4.00, 6.86, or 9.18)
2. Press the calibration button — the meter will automatically identify the buffer and calibrate
3. Repeat with a second buffer solution to complete 2-point calibration
4. The meter is now ready for accurate measurements

Applications

• Aquarium & Fish Tanks – Maintain proper pH for freshwater and saltwater fish
• Swimming Pools & Spas – Monitor and adjust pool chemistry
• Hydroponics & Gardening – Optimize nutrient solution pH for plant growth
• Aquaponics Systems – Balance pH for fish and plants
• Fish Farming & Aquaculture – Commercial fish farm water quality monitoring
• Drinking Water Testing – Check tap, well, or filtered water pH
• Food & Beverage Industry – Quality control for dairy, brewing, fermentation, and processing
• School Laboratories – Educational chemistry and biology experiments
• Wine & Beer Brewing – Monitor fermentation and final product pH
• Soil Testing (with extraction) – Check soil pH for agriculture and gardening
• Cosmetics & Personal Care – Verify pH of creams, lotions, and shampoos
• Industrial Quality Control – Process water and effluent pH monitoring
• Photography & Darkroom – Monitor chemical bath pH
• Cheese Making & Dairy – Track pH during curdling and fermentation
• Home Use – Test household water, beverages, and homemade products