Hanna Instruments
Hanna Instruments HI98107 pHep pH Tester
$64.99
Best Ph Meters · head-to-head
Hanna Instruments HI98107 pHep pH Tester vs VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics
A sourced, side-by-side comparison. VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics is cheaper at $8.55. Every spec and price links to its source.
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VIVOSUN
VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics
$8.55Cheaper
Which is better: the Hanna Instruments HI98107 pHep pH Tester or VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics?
On the specs we track, they're closely matched. The VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics is the cheaper at $8.55.
See Hanna Instruments HI98107 pHep pH Tester on Amazon Check VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics price
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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 | VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics |
|---|---|---|
| US price | $64.99 | $8.55 |
| Brand | Hanna Instruments | VIVOSUN |
| Released | — | — |
| Ph range | 0.0 to 14.0 pH | 0.00 to 14.00 |
| 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 | 3-point (calibration buffer powders included) |
| Atc | Automatic, 0 to 50°C | Yes |
| Electrode type | Cloth-junction pH electrode (larger surface area than a standard ceramic junction) | — |
| Waterproof rating | Waterproof; rated to RH 100% max, 0 to 50°C | — |
| Battery type | 1 x CR2032 3V lithium, approx. 1000 hours continuous use | 2 x 1.5V button cell (built-in) |
Sources — Hanna Instruments HI98107 pHep pH Tester: hannainst.com (verified 2026-08-12). VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics: amazon.com (verified 2026-08-12).
What's the difference between the Hanna Instruments HI98107 pHep pH Tester and VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Ph range: Hanna Instruments HI98107 pHep pH Tester 0.0 to 14.0 pH vs VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics 0.00 to 14.00
- Resolution ph: Hanna Instruments HI98107 pHep pH Tester 0.1 pH vs VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics 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 VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics ±0.01 pH
- Calibration points: Hanna Instruments HI98107 pHep pH Tester Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 vs VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics 3-point (calibration buffer powders included)
- Atc: Hanna Instruments HI98107 pHep pH Tester Automatic, 0 to 50°C vs VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics Yes
- Battery type: Hanna Instruments HI98107 pHep pH Tester 1 x CR2032 3V lithium, approx. 1000 hours continuous use vs VIVOSUN Digital pH Meter Pen Tester for Water & Hydroponics 2 x 1.5V button cell (built-in)