Hanna Instruments
Hanna Instruments HI98107 pHep pH Tester
$64.99Cheaper
Best Ph Meters · head-to-head
Hanna Instruments HI98107 pHep pH Tester vs Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe
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.
Atlas Scientific
Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe
$174.99
Which is better: the Hanna Instruments HI98107 pHep pH Tester or Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe?
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 Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe on Amazon
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
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 | Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe |
|---|---|---|
| US price | $64.99 | $174.99 |
| Brand | Hanna Instruments | Atlas Scientific |
| Released | — | — |
| Ph range | 0.0 to 14.0 pH | 0 to 14 pH |
| Resolution ph | 0.1 pH | 0.001 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) | ±0.002 pH (probe reading accuracy) |
| Calibration points | Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 | Up to 3-point; kit includes 6x 20ml calibration solution pouches (2x pH 4, 2x pH 7, 2x pH 10) |
| Atc | Automatic, 0 to 50°C | — |
| Electrode type | Cloth-junction pH electrode (larger surface area than a standard ceramic junction) | Double-junction Ag/AgCl Gen 3 Lab Grade pH probe (BNC connection to EZO pH circuit board) |
| Waterproof rating | Waterproof; rated to RH 100% max, 0 to 50°C | — |
| Battery type | 1 x CR2032 3V lithium, approx. 1000 hours continuous use | None — EZO circuit is powered by the host carrier/development board, no internal battery |
Sources — Hanna Instruments HI98107 pHep pH Tester: hannainst.com (verified 2026-08-12). Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe: atlas-scientific.com (verified 2026-08-12).
What's the difference between the Hanna Instruments HI98107 pHep pH Tester and Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe?
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 Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe 0 to 14 pH
- Resolution ph: Hanna Instruments HI98107 pHep pH Tester 0.1 pH vs Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe 0.001 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 Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe ±0.002 pH (probe reading accuracy)
- Calibration points: Hanna Instruments HI98107 pHep pH Tester Automatic, 1 or 2-point, using standard buffers 4.01/7.01/10.01 vs Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe Up to 3-point; kit includes 6x 20ml calibration solution pouches (2x pH 4, 2x pH 7, 2x pH 10)
- Electrode type: Hanna Instruments HI98107 pHep pH Tester Cloth-junction pH electrode (larger surface area than a standard ceramic junction) vs Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe Double-junction Ag/AgCl Gen 3 Lab Grade pH probe (BNC connection to EZO pH circuit board)
- Battery type: Hanna Instruments HI98107 pHep pH Tester 1 x CR2032 3V lithium, approx. 1000 hours continuous use vs Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe None — EZO circuit is powered by the host carrier/development board, no internal battery