Summary: ThermoWorks offers a range of pH meters from entry-level waterproof pens to high-precision professional kits. Selecting the right meter depends on your required accuracy (e.g., ±0.05pH vs. ±0.2pH) and whether you need a replaceable electrode.
Waterproof Pen-Style Meters (86 Series)
Compact, waterproof, and easy to use. Best for field work and quick spot checks.
| Model | Accuracy | Key Features | Price |
|---|---|---|---|
|
8680 (Entry Level) |
±0.3 pH | Waterproof, 3-point auto-cal. Good for rough checks. | $49.00 |
|
8681 (Standard) |
±0.2 pH | Adds ATC (Auto-Temp Compensation) and C/F switching. | $59.00 |
|
8682 (High Accuracy) |
±0.05 pH | High accuracy with ATC. Very precise. | $79.00 |
|
8689 (Premium) |
±0.05 pH | $45 Replaceable Electrode. Splash-proof, dual display. Long-term best value. | $99.00 |
Professional Portable Meters (8000 Series)
Separate meter and probe configurations for lab-quality results.
| Model | Accuracy | Includes | Price |
|---|---|---|---|
| Precision 8000 | ±0.05 pH | Meter & Glass Electrode. (3-pt auto-cal). | $149.00 |
| Precision 8100 Kit | ±0.05 pH | Meter, Glass Electrode, & Temp Probe. | $214.00 |
| 8100 Plus Kit | ±0.02 pH | Highest Accuracy. Includes Temp Probe & Glass Electrode. | $299.00 |
Essential Accessories
- Calibration Buffers ($28–$93): NIST-certified solutions available in 500ml bottles, 20ml sachets, or variety kits. Required for daily calibration.
- Replacement Electrode ($45): Specifically for the 8689 model.
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