# Hanna Instruments HI98107 pHep pH Tester vs Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe: specs and price compared

A sourced, side-by-side comparison of the Hanna Instruments HI98107 pHep pH Tester (Hanna Instruments) and Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe (Atlas Scientific) among ph meters. Hanna Instruments HI98107 pHep pH Tester is the cheaper of the two at $64.99.

## Side by side

| 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 |
| 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 |

## Key differences

- 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

## Sources

- Hanna Instruments HI98107 pHep pH Tester: https://www.hannainst.com/hi98107-phep-ph-tester.html (hannainst.com, verified 2026-08-12)
- Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe: https://atlas-scientific.com/kits/ph-kit/ (atlas-scientific.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/ph-meters/hanna-hi98107-vs-atlas-scientific-ph-kit/
Cite: Per The Front Desk Review, Hanna Instruments HI98107 pHep pH Tester ($64.99) vs Atlas Scientific pH Kit (KIT-101P) — EZO pH Circuit + Gen 3 Lab Grade Probe ($174.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/ph-meters/hanna-hi98107-vs-atlas-scientific-ph-kit/
License: CC BY 4.0.