Pocket pH Tester
Compact handheld pH meter with 0.01 pH resolution, ±0.2 pH accuracy, and automatic temperature compensation for portable pH measurements in laboratory and field applications.
Louise Corscadden, PhD
Neuroscience · ConductScience
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The Pocket pH Tester is a compact, handheld instrument designed for rapid pH measurement in laboratory and field environments. This portable meter provides 0.01 pH resolution with ±0.2 pH accuracy across its full measurement range, making it suitable for applications requiring moderate precision pH monitoring.
The instrument features automatic temperature compensation from 0-50°C and supports 1 to 3 point calibration for enhanced measurement reliability. Its compact form factor (31×18×155mm) and lightweight design (43g) enable convenient handheld operation in diverse sampling locations.
How It Works
The pH meter operates using a glass electrode system that generates a voltage proportional to hydrogen ion concentration. The glass membrane selectively responds to H+ ions, creating an electrochemical potential difference that correlates with solution pH according to the Nernst equation.
Automatic temperature compensation adjusts readings based on temperature-dependent changes in electrode response and solution pH. The instrument compares the sample electrode potential against a stable reference electrode, with the resulting voltage converted to pH units through calibrated algorithms.
Features & Benefits
Automation Level
- manual
pH
- Range
Calibration Points
- 1 to 3 points
Auto. Temp. Compensation
- 0~50℃
Power Requirements
- 2*1.5V(LR44)
External Size(W*D*H)
- 31*18*155mm
Package Size(W*D*H)
- 58*30*167mm
Brand
- ConductScience
Research Domain
- Analytical Chemistry
- Environmental Monitoring
- Food Science
- Materials Science
- Microbiology
- Pharmaceutical QC
Accuracy
- ±0.2pH
Weight
- 104g
Weight
- 0.09 kg
Dimensions
- L: 15.5 mm
- W: 3.1 mm
- H: 1.8 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Resolution | 0.01 pH | Entry-level meters often provide 0.1 pH resolution | Higher resolution enables detection of smaller pH changes in buffer optimization and quality control applications |
| Accuracy | ±0.2 pH | Basic handheld meters may offer ±0.5 pH or lower accuracy | Improved accuracy reduces measurement uncertainty in quantitative pH determinations |
| Temperature Compensation Range | 0-50°C automatic | Some models require manual temperature entry | Automatic compensation eliminates user error and speeds measurement workflow |
| Calibration Points | 1 to 3 points selectable | Fixed calibration schemes in basic models | Flexible calibration allows optimization for specific measurement ranges and applications |
| Weight | 43g compact design | Handheld meters typically range 50-200g | Lightweight construction reduces hand fatigue during extended measurement sessions |
The Pocket pH Tester combines 0.01 pH resolution with ±0.2 pH accuracy in a 43g handheld package. Its flexible calibration options and automatic temperature compensation provide measurement capabilities suitable for routine laboratory and field applications.
Practical Tips
Calibrate using buffers that bracket your expected sample pH range for optimal accuracy.
Why: Electrode response is most linear near calibration points, improving measurement precision.
Store electrode in pH 7 buffer or electrode storage solution when not in use.
Why: Proper storage maintains electrode hydration and extends operational lifespan.
Allow electrode to equilibrate for 30-60 seconds in each sample before recording readings.
Why: Equilibration time ensures stable electrode potential and accurate pH measurement.
If readings drift or appear sluggish, clean electrode with mild detergent and rinse thoroughly.
Why: Contamination on the glass membrane can interfere with electrode response and measurement stability.
Verify calibration with a check standard between sample batches during extended use sessions.
Why: Periodic verification detects electrode drift that could compromise measurement accuracy.
Rinse electrode with distilled water between samples to prevent cross-contamination.
Why: Cross-contamination can alter sample pH and compromise both current and subsequent measurements.
Setup Guide
What’s in the Box
- Pocket pH Tester main unit
- Protective electrode cap
- Two LR44 batteries (typical)
- User manual (typical)
- Calibration buffer solutions (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support available for calibration and operational guidance.
Compliance
What calibration buffers are recommended for this pH meter?
Standard pH 4.0, 7.0, and 10.0 buffer solutions are typically used, with 1-3 points selected based on your measurement range requirements.
How often should the instrument be recalibrated?
Calibration frequency depends on measurement requirements and sample types, but daily calibration is recommended for critical applications.
Can this meter measure pH in non-aqueous solutions?
The instrument is designed for aqueous solutions; consult product datasheet for compatibility with specific non-aqueous media.
What is the electrode's expected lifespan?
Electrode life varies with usage and sample types; proper maintenance and storage can extend operational life significantly.
Is the meter suitable for continuous monitoring applications?
This handheld unit is designed for spot measurements rather than continuous logging; consider dedicated monitoring systems for extended deployment.
How does temperature affect measurement accuracy?
Automatic temperature compensation from 0-50°C adjusts for temperature-dependent electrode response and solution pH changes.
Can measurements be recorded or exported?
Consult product datasheet for data logging capabilities and output options available with this model.
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