# Hanna Instruments HI98107 pHep pH Tester vs Extech PH100 ExStik II Waterproof pH Meter: specs and price compared

A sourced, side-by-side comparison of the Hanna Instruments HI98107 pHep pH Tester (Hanna Instruments) and Extech PH100 ExStik II Waterproof pH Meter (Extech Instruments) 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 | Extech PH100 ExStik II Waterproof pH Meter |
| --- | --- | --- |
| US price | $64.99 | $124 |
| Brand | Hanna Instruments | Extech Instruments |
| 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 |

## Key differences

- 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

## Sources

- Hanna Instruments HI98107 pHep pH Tester: https://www.hannainst.com/hi98107-phep-ph-tester.html (hannainst.com, verified 2026-08-12)
- Extech PH100 ExStik II Waterproof pH Meter: https://www.extech.com/products/PH100 (extech.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/ph-meters/hanna-hi98107-vs-extech-ph100/
Cite: Per The Front Desk Review, Hanna Instruments HI98107 pHep pH Tester ($64.99) vs Extech PH100 ExStik II Waterproof pH Meter ($124) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/ph-meters/hanna-hi98107-vs-extech-ph100/
License: CC BY 4.0.