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pHrog - Handheld Spectrophotometric pH cover

pHrog - Handheld Spectrophotometric pH

CERN-OHL-S-2.0

An ultra-low cost Build-It-Yourself spectrophotometric pH meter.

Oceanography, Chemistry Hardware w/ Firmware pHalkon Industries updated 2026-09-17

This project was designed to create spectrophotometric pH meter that is as low-cost as possible, has high precision and accuracy, and can be built by anybody with the components using just a soldering iron.

It features only through hole components, no SMD parts.

Development is still in progress.

Maturity

Only some parts work so far (2/10, self-assessed)

Still in development

Contributors

Repositories

Project files

Funding

Self-Funded

Cite this project

DOI 10.5281/zenodo.22815611

Project DOI (always points at the latest version): 10.5281/zenodo.22815611

Latest version DOI (v1): 10.5281/zenodo.22815612 · All versions

Cite the project DOI for the work as a whole. Cite a version DOI when you need to point at exactly one snapshot.

Tags

diy low-cost ph spectrophotometric