Hanna Instruments
Hanna Instruments HI98107 pHep pH Tester
$64.99Cheaper
Best Ph Meters · head-to-head
Hanna Instruments HI98107 pHep pH Tester vs Bluelab pH Pen
A sourced, side-by-side comparison. Hanna Instruments HI98107 pHep pH Tester is cheaper at $64.99. Every spec and price links to its source.
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Bluelab
Bluelab pH Pen
$99
Which is better: the Hanna Instruments HI98107 pHep pH Tester or Bluelab pH Pen?
On the specs we track, they're closely matched. The Hanna Instruments HI98107 pHep pH Tester is the cheaper at $64.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Hanna Instruments HI98107 pHep pH Tester | Bluelab pH Pen |
|---|---|---|
| US price | $64.99 | $99 |
| Brand | Hanna Instruments | Bluelab |
| Released | — | — |
| Ph range | 0.0 to 14.0 pH | 0.0 to 14.0 |
| Resolution ph | 0.1 pH | 0.1 |
| Accuracy ph | ±0.1 pH at 25°C/77°F (Hanna's own spec table separately lists ±0.2 pH; the narrative accuracy claim ±0.1 pH is used here) | ±0.1 at 25°C/77°F |
| Calibration points | Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 | Two-point (pH 7.0 and pH 4.0 solutions), with a built-in 30-day calibration reminder |
| Atc | Automatic, 0 to 50°C | Yes, fully temperature compensated |
| Electrode type | Cloth-junction pH electrode (larger surface area than a standard ceramic junction) | Double-junction pH probe |
| Waterproof rating | Waterproof; rated to RH 100% max, 0 to 50°C | Waterproof; floats in any solution |
| Battery type | 1 x CR2032 3V lithium, approx. 1000 hours continuous use | 1 x AAA alkaline |
Sources — Hanna Instruments HI98107 pHep pH Tester: hannainst.com (verified 2026-08-12). Bluelab pH Pen: bluelab.com (verified 2026-08-12).
What's the difference between the Hanna Instruments HI98107 pHep pH Tester and Bluelab pH Pen?
Where the two actually differ on the specs we track (8 of 8). Matching specs are omitted.
- Ph range: Hanna Instruments HI98107 pHep pH Tester 0.0 to 14.0 pH vs Bluelab pH Pen 0.0 to 14.0
- Resolution ph: Hanna Instruments HI98107 pHep pH Tester 0.1 pH vs Bluelab pH Pen 0.1
- Accuracy ph: Hanna Instruments HI98107 pHep pH Tester ±0.1 pH at 25°C/77°F (Hanna's own spec table separately lists ±0.2 pH; the narrative accuracy claim ±0.1 pH is used here) vs Bluelab pH Pen ±0.1 at 25°C/77°F
- Calibration points: Hanna Instruments HI98107 pHep pH Tester Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 vs Bluelab pH Pen Two-point (pH 7.0 and pH 4.0 solutions), with a built-in 30-day calibration reminder
- Atc: Hanna Instruments HI98107 pHep pH Tester Automatic, 0 to 50°C vs Bluelab pH Pen Yes, fully temperature compensated
- Electrode type: Hanna Instruments HI98107 pHep pH Tester Cloth-junction pH electrode (larger surface area than a standard ceramic junction) vs Bluelab pH Pen Double-junction pH probe
- Waterproof rating: Hanna Instruments HI98107 pHep pH Tester Waterproof; rated to RH 100% max, 0 to 50°C vs Bluelab pH Pen Waterproof; floats in any solution
- Battery type: Hanna Instruments HI98107 pHep pH Tester 1 x CR2032 3V lithium, approx. 1000 hours continuous use vs Bluelab pH Pen 1 x AAA alkaline