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The Labshark pH pen (also referred to as a pH tester pen, pH meter pen, or pen type pH meter) is a portable, high-precision instrument designed for accurate pH measurement in water, beverages, and environmental applications. With automatic temperature compensation (ATC) across the full range of 0–50°C, this portable pH tester ensures reliable readings even in fluctuating temperatures.
Available in four models—PH-20, PH-220, PH-20W, and PH-220W—this pocket pH meter offers resolution of 0.1 pH or 0.01 pH and accuracy of ±0.2 pH or ±0.02 pH. The digital pH meter features a blue-effect glass bulb with low impedance for faster response, a built-in ceramic temperature electrode, and a replaceable electrode head. Whether you need a water pH tester for aquaculture or a pH meter for laboratory use, Labshark provides a reliable and user-friendly solution. This handheld pH meter is also a perfect ph measurement tool for field and lab.
Parameter | PH-20 | PH-220 | PH-20W | PH-220W |
|---|---|---|---|---|
Measurement Range | 0.1–14.0 pH | 0.01–14.0 pH | 0.1–14.0 pH | 0.01–14.0 pH |
Resolution | 0.1 pH | 0.01 pH | 0.1 pH | 0.01 pH |
Accuracy | ±0.2 pH | ±0.02 pH | ±0.2 pH | ±0.02 pH |
Operating Temperature | 0–50°C (32–122°F) | 0–50°C (32–122°F) | 0–50°C (32–122°F) | 0–50°C (32–122°F) |
ATC Range | 0–50°C (32–122°F) | 0–50°C (32–122°F) | 0–50°C (32–122°F) | 0–50°C (32–122°F) |
Display | LCD | LCD | LCD | LCD |
Power Supply | 4 × 1.5V button cell batteries | 4 × 1.5V button cell batteries | 4 × 1.5V button cell batteries | 4 × 1.5V button cell batteries |
Temperature Accuracy | ±1°C (1°F) | ±1°C (1°F) | ±1°C (1°F) | ±1°C (1°F) |
Temperature Resolution | 0.1°C (1°F) | 0.1°C (1°F) | 0.1°C (1°F) | 0.1°C (1°F) |
Electrode Type | Built-in | Built-in | External | External |
Product Dimensions | Diameter 40 × 190 mm | Diameter 40 × 190 mm | Diameter 40 × 190 mm | Diameter 40 × 190 mm |
Product Weight | 88 g | 88 g | 88 g | 88 g |
Package Contents: pH tester ×1, calibration powder ×3, batteries ×1 set, storage case ×1, instruction manual ×1, warranty card ×1.
The pH pen uses a blue-effect glass bulb with low impedance, providing faster response and more accurate readings. This pH tester pen is ideal for quick, on-site measurements in water, beverages, and environmental samples.
This pH meter pen features a built-in ceramic temperature electrode with automatic temperature compensation across the full range of 0–50°C. The portable pH tester ensures precise measurement even when sample temperatures vary, reducing measurement error.
The pocket pH meter has a replaceable electrode head, a fully waterproof design, and a built-in float. This makes it durable and easy to maintain, extending the lifespan of the digital pH meter.
The pH pen is equipped with Omron waterproof buttons with a service life of over 20,000 presses. This ensures reliable operation and long-term durability, even in demanding environments.
The pH tester pen features an LED wide-viewing-angle LCD display for clear readings. The LPH-100A model features a backlit display for even clearer readings in low-light conditions.
This handheld pH meter supports three-point automatic calibration with accuracy of ±0.05 pH. The digital pH meter ensures precise and reproducible measurements for laboratory and field applications.
The pH pen offers flexible power options: a long-standby battery model or a convenient rechargeable model. This ensures you can use the portable pH tester anywhere, anytime.
Your Need | Recommended Model |
|---|---|
Basic pH measurement (0.1 pH resolution) | PH-20 – Built-in electrode, ±0.2 pH accuracy. |
High-precision pH measurement (0.01 pH resolution) | PH-220 – Built-in electrode, ±0.02 pH accuracy. |
Basic pH measurement with external electrode | PH-20W – External electrode, ±0.2 pH accuracy. |
High-precision pH measurement with external electrode | PH-220W – External electrode, ±0.02 pH accuracy. |
Remove the protective cap from the electrode.
Rinse the electrode with purified or distilled water.
If using a rechargeable model, ensure the battery is charged.
Immerse the electrode in the standard buffer solution.
Press the "CAL" key. Do not remove the pH pen from the buffer solution until the "END" symbol is displayed.
For three-point calibration, repeat with additional buffer solutions.
Immerse the electrode in the sample solution.
Stir gently and wait for the reading to stabilize.
Read the pH value and temperature on the LCD display.
After each test, rinse the electrode thoroughly with purified or distilled water.
If the pen is not used for an extended period, remove the batteries.
Store the pH pen in its storage case.
Precautions:
After each test, rinse the electrode thoroughly with purified or distilled water.
If the pen is not used for an extended period, remove the batteries.
During calibration, do not remove the pH pen from the standard buffer solution until the "END" symbol is displayed.
Do not press the "CAL" key under non-standard calibration conditions, as this may cause incorrect calibration.
Low battery indication: When the battery symbol appears, the voltage is insufficient.
Our pH pen is widely used in:
Water Sources: Tap water, aquaculture, and environmental protection.
Industrial Processes: Printing and dyeing, electroplating.
Beverage Industry: Quality control and product testing.
Scientific Research: Laboratory pH measurement.
Education: Chemistry and biology experiments.
Whether you need a water pH tester for field work, a pH meter for laboratory use, or a digital pH pen tester for industrial applications, Labshark provides reliable and accurate solutions.
A: The PH-20 has a resolution of 0.1 pH and accuracy of ±0.2 pH. The PH-220 has a resolution of 0.01 pH and accuracy of ±0.02 pH.
A: The "W" models (PH-20W, PH-220W) feature an external electrode, while the non-W models have a built-in electrode.
A: Calibration frequency depends on usage. For accurate results, we recommend calibrating before each use or at least once a week.
A: The pH pen has an operating temperature range of 0–50°C. Do not use it outside this range.
A: Recalibrate the pH pen using fresh buffer solutions. If the issue persists, replace the electrode head.
Whether you are a water quality technician, laboratory researcher, or industrial operator, Labshark pH pens offer the perfect combination of portability, accuracy, and durability. Choose from PH-20, PH-220, PH-20W, or PH-220W to match your specific measurement needs.
Order your Labshark pH pen today! Bulk inquiries and custom configurations are welcome – contact our team for assistance.
