Hanna Instruments
Hanna Instruments HI98107 pHep pH Tester
$64.99Cheaper
Best Ph Meters · head-to-head
Hanna Instruments HI98107 pHep pH Tester vs Extech PH100 ExStik II Waterproof pH Meter
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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Extech Instruments
Extech PH100 ExStik II Waterproof pH Meter
$124
Which is better: the Hanna Instruments HI98107 pHep pH Tester or Extech PH100 ExStik II Waterproof pH Meter?
On the specs we track, they're closely matched. The Hanna Instruments HI98107 pHep pH Tester is the cheaper at $64.99.
See Hanna Instruments HI98107 pHep pH Tester on Amazon See Extech PH100 ExStik II Waterproof pH Meter on Amazon
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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 | Extech PH100 ExStik II Waterproof pH Meter |
|---|---|---|
| US price | $64.99 | $124 |
| Brand | Hanna Instruments | Extech Instruments |
| Released | — | — |
| Ph range | 0.0 to 14.0 pH | 0.00 to 14.00 pH |
| Resolution ph | 0.1 pH | 0.01 pH |
| 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) | ±0.01 pH |
| Calibration points | Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 | — |
| Atc | Automatic, 0 to 50°C | Yes, automatic |
| Electrode type | Cloth-junction pH electrode (larger surface area than a standard ceramic junction) | Flat-surface electrode (rated for liquids, semi-solids, and solids) |
| Waterproof rating | Waterproof; rated to RH 100% max, 0 to 50°C | IP57 |
| Battery type | 1 x CR2032 3V lithium, approx. 1000 hours continuous use | 4 x CR2032 3V button cell |
Sources — Hanna Instruments HI98107 pHep pH Tester: hannainst.com (verified 2026-08-12). Extech PH100 ExStik II Waterproof pH Meter: extech.com (verified 2026-08-12).
What's the difference between the Hanna Instruments HI98107 pHep pH Tester and Extech PH100 ExStik II Waterproof pH Meter?
Where the two actually differ on the specs we track (7 of 8). Matching specs are omitted.
- Ph range: Hanna Instruments HI98107 pHep pH Tester 0.0 to 14.0 pH vs Extech PH100 ExStik II Waterproof pH Meter 0.00 to 14.00 pH
- Resolution ph: Hanna Instruments HI98107 pHep pH Tester 0.1 pH vs Extech PH100 ExStik II Waterproof pH Meter 0.01 pH
- 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 Extech PH100 ExStik II Waterproof pH Meter ±0.01 pH
- Atc: Hanna Instruments HI98107 pHep pH Tester Automatic, 0 to 50°C vs Extech PH100 ExStik II Waterproof pH Meter Yes, automatic
- Electrode type: Hanna Instruments HI98107 pHep pH Tester Cloth-junction pH electrode (larger surface area than a standard ceramic junction) vs Extech PH100 ExStik II Waterproof pH Meter Flat-surface electrode (rated for liquids, semi-solids, and solids)
- Waterproof rating: Hanna Instruments HI98107 pHep pH Tester Waterproof; rated to RH 100% max, 0 to 50°C vs Extech PH100 ExStik II Waterproof pH Meter IP57
- Battery type: Hanna Instruments HI98107 pHep pH Tester 1 x CR2032 3V lithium, approx. 1000 hours continuous use vs Extech PH100 ExStik II Waterproof pH Meter 4 x CR2032 3V button cell