# Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester vs Extech PH100 ExStik II Waterproof pH Meter: specs and price compared

A sourced, side-by-side comparison of the Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester (Apera Instruments) and Extech PH100 ExStik II Waterproof pH Meter (Extech Instruments) among ph meters. Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester is the cheaper of the two at $110.

## Side by side

| Spec | Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester | Extech PH100 ExStik II Waterproof pH Meter |
| --- | --- | --- |
| US price | $110 | $124 |
| Brand | Apera Instruments | Extech Instruments |
| Ph range | -2.00 to 16.00 pH | 0.00 to 14.00 pH |
| Resolution ph | 0.01 / 0.1 pH (selectable) | 0.01 pH |
| Accuracy ph | ±0.01 pH ±1 digit | ±0.01 pH |
| Calibration points | Automatic, 1 to 3 points; auto-recognizes buffers 1.68, 4.00, 7.00, 10.01, 12.46 | — |
| Atc | Automatic, 0 to 50°C (32 to 122°F) | Yes, automatic |
| Electrode type | Replaceable single-junction ceramic pH probe, lead-free lithium-based glass bulb membrane, Ag/AgCl reference, KCl gel electrolyte | Flat-surface electrode (rated for liquids, semi-solids, and solids) |
| Waterproof rating | IP67, floats | IP57 |
| Battery type | 4 x AAA (DC3V), up to 2000 hours continuous use | 4 x CR2032 3V button cell |

## Key differences

- Ph range: Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester -2.00 to 16.00 pH vs Extech PH100 ExStik II Waterproof pH Meter 0.00 to 14.00 pH
- Resolution ph: Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester 0.01 / 0.1 pH (selectable) vs Extech PH100 ExStik II Waterproof pH Meter 0.01 pH
- Accuracy ph: Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester ±0.01 pH ±1 digit vs Extech PH100 ExStik II Waterproof pH Meter ±0.01 pH
- Atc: Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester Automatic, 0 to 50°C (32 to 122°F) vs Extech PH100 ExStik II Waterproof pH Meter Yes, automatic
- Electrode type: Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester Replaceable single-junction ceramic pH probe, lead-free lithium-based glass bulb membrane, Ag/AgCl reference, KCl gel electrolyte vs Extech PH100 ExStik II Waterproof pH Meter Flat-surface electrode (rated for liquids, semi-solids, and solids)
- Waterproof rating: Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester IP67, floats vs Extech PH100 ExStik II Waterproof pH Meter IP57
- Battery type: Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester 4 x AAA (DC3V), up to 2000 hours continuous use vs Extech PH100 ExStik II Waterproof pH Meter 4 x CR2032 3V button cell

## Sources

- Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester: https://aperainst.com/ph60-premium-waterproof-ph-tester-ph-meter-with-replaceable-probe-and-blacklight-apera-instruments (aperainst.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/apera-ph60-vs-extech-ph100/
Cite: Per The Front Desk Review, Apera Instruments PH60 Premium Series Waterproof Pocket pH Tester ($110) vs Extech PH100 ExStik II Waterproof pH Meter ($124) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/ph-meters/apera-ph60-vs-extech-ph100/
License: CC BY 4.0.