Bio Shop™ presents the Digital pH Meter Pen, a compact and easy-to-use testing tool designed for DIY skincare makers, cosmetic formulators, soap makers, haircare creators, and laboratory-style home users. Whether you are checking the pH of face wash, shampoo, toner, cream, soap solution, or water-based cosmetic formulas, this digital pH meter helps you measure acidity and alkalinity quickly and conveniently.

With a wide testing range of 0.00 to 14.00 pH, a clear LCD display, and one-touch calibration support, this pH meter is an essential tool for anyone who wants to create safer, more balanced, and better-performing formulations.

At Bio Shop™, we recommend using a pH meter whenever you are making water-based skincare or haircare products, especially formulas containing acids, preservatives, surfactants, or active ingredients.

Key Features

• Digital LCD screen for easy reading
• Measures pH from 0.00 to 14.00
• Resolution: 0.01 pH
• Accuracy: ±0.01 pH
• One-touch calibration button
• Compact pen-style design
• Lightweight and easy to carry
• Protective storage case included
• Buffer powder sachets included for calibration
• Suitable for skincare, haircare, soap testing, water testing, and DIY cosmetic formulation

Product Specifications

Product Name: Digital pH Meter Pen
Measuring Range: 0.00–14.00 pH
Resolution: 0.01 pH
Accuracy: ±0.01 pH
Power Supply: 2 × 1.5V LR44 button cells
Operating Temperature: 0°C–60°C
Calibration: Automatic calibration
Size: Approx. 155mm × 31mm × 18mm
Weight: Approx. 50g

What’s Included

• 1 × Digital pH Meter Pen
• 1 × Protective Storage Case
• 1 × Instruction Leaflet
• pH Buffer Powder Sachets
  • pH 4.00
  • pH 6.86
  • pH 9.18, depending on kit variant/stock

Best Uses

This pH meter is useful for testing:

• Face wash
• Shampoo
• Conditioner
• Toner
• Serum
• Creams and lotions
• Soap solution
• Liquid soap
• Herbal extracts
• Hydrosols
• Water-based cosmetic formulas
• DIY skincare batches
• General water testing

Why pH Testing Is Important

pH balance is very important in cosmetic making. Agar product ka pH skin ya hair ke liye suitable na ho, to irritation, dryness, instability, ya preservative failure ka risk ho sakta hai.

For example:

• Facial skincare products are usually kept mildly acidic
• Shampoo and conditioner need suitable pH for hair comfort
• Preservatives often work only within a specific pH range
• Acid-based products require careful pH checking before use

This pH meter helps makers check formulas more confidently before final use.

Specifications

How to Use

1. Remove the protective cap.
2. Rinse the electrode with distilled water.
3. Gently dry with clean tissue or filter paper.
4. Press the ON/OFF button.
5. Dip the electrode into the solution to be tested. Do not immerse above the safe immersion line.
6. Stir gently and wait around 30 seconds for the reading to stabilize.
7. Note the pH reading from the LCD screen.
8. After use, rinse the electrode with distilled water.
9. Dry gently and replace the protective cap.

Calibration Method

For accurate results, calibrate the meter before important testing.

1. Prepare calibration solution by mixing each buffer powder sachet with 250ml distilled water.
2. Use separate clean containers for each buffer solution.
3. Turn on the pH meter.
4. Place the electrode in the pH 6.86 buffer solution.
5. Press and hold the CAL button for about 5 seconds.
6. Wait until calibration completes.
7. Rinse with distilled water before testing another buffer.
8. Repeat with pH 4.00 and pH 9.18 if three-point calibration is required.

For general DIY use, pH 6.86 calibration is usually enough. For higher accuracy, use all three buffer points.

Maintenance Tips

• Always rinse the electrode after use.
• Do not store the electrode dirty.
• Do not scratch or touch the sensor tip roughly.
• Always replace the protective cap after use.
• If the electrode becomes dry, soak it in distilled water for a few hours before use.
• Replace the batteries if the display becomes weak, unclear, or unstable.
• Store the meter in its protective case.

Important Safety & Usage Notes

This pH meter is a measuring tool, not a medical device. Results may vary depending on calibration, liquid temperature, sample preparation, and electrode condition.

For cosmetic formulation, always test pH in a properly diluted or fully mixed sample. Thick creams, gels, and emulsions should be tested carefully because very thick textures may not give stable readings directly.

Use distilled water for calibration and cleaning whenever possible.