# Extech PH100 ExStik II Waterproof pH Meter vs Oakton pHTestr 10 Waterproof BNC Pocket pH Tester (WD-35634-14): specs and price compared

A sourced, side-by-side comparison of the Extech PH100 ExStik II Waterproof pH Meter (Extech Instruments) and Oakton pHTestr 10 Waterproof BNC Pocket pH Tester (WD-35634-14) (Oakton Instruments) among ph meters. Extech PH100 ExStik II Waterproof pH Meter is the cheaper of the two at $124.

## Side by side

| Spec | Extech PH100 ExStik II Waterproof pH Meter | Oakton pHTestr 10 Waterproof BNC Pocket pH Tester (WD-35634-14) |
| --- | --- | --- |
| US price | $124 | $169.3 |
| Brand | Extech Instruments | Oakton Instruments |
| Ph range | 0.00 to 14.00 pH | — |
| Resolution ph | 0.01 pH | — |
| Accuracy ph | ±0.01 pH | — |
| Calibration points | — | Three-point, push-button calibration with auto-buffer recognition |
| Atc | Yes, automatic | — |
| Electrode type | Flat-surface electrode (rated for liquids, semi-solids, and solids) | Replaceable BNC pH probe |
| Waterproof rating | IP57 | IP67 |
| Battery type | 4 x CR2032 3V button cell | — |

## Key differences

- Electrode type: Extech PH100 ExStik II Waterproof pH Meter Flat-surface electrode (rated for liquids, semi-solids, and solids) vs Oakton pHTestr 10 Waterproof BNC Pocket pH Tester (WD-35634-14) Replaceable BNC pH probe
- Waterproof rating: Extech PH100 ExStik II Waterproof pH Meter IP57 vs Oakton pHTestr 10 Waterproof BNC Pocket pH Tester (WD-35634-14) IP67

## Sources

- Extech PH100 ExStik II Waterproof pH Meter: https://www.extech.com/products/PH100 (extech.com, verified 2026-08-12)
- Oakton pHTestr 10 Waterproof BNC Pocket pH Tester (WD-35634-14): https://www.amazon.com/Oakton-WD-35634-14-Waterproof-pHTestr-Pocket/dp/B012BSBPFW/ (amazon.com, verified 2026-08-12)

Canonical: https://frontdeskreview.com/gear/ph-meters/extech-ph100-vs-oakton-phtestr-10/
Cite: Per The Front Desk Review, Extech PH100 ExStik II Waterproof pH Meter ($124) vs Oakton pHTestr 10 Waterproof BNC Pocket pH Tester (WD-35634-14) ($169.3) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/ph-meters/extech-ph100-vs-oakton-phtestr-10/
License: CC BY 4.0.