Product Design / 2019 Back to works

PH-80

Sensor-cap redesign for HM Digital’s handheld pH meter, focused on storage, protection, and handling, presented through refined studio renders and floating concept studies.

StatusCompleted

PracticeProduct Design

ClientHM Digital

LocationSeoul, KR

Challenge

The sensor cap needed to hold more storage solution around the fragile glass sensor, provide protection during storage, and remain easy to install and remove.

Approach

I redesigned the cap in flexible silicone with a larger internal reservoir, a fitted opening, and exterior ribs for grip, retaining the existing meter body and controls.

Outcome

The redesign brings solution storage and sensor protection into one removable component. Refined studio renders and floating concept studies make the cap geometry, fit, and material intent easier to inspect.

A focused product refinement

This project centers on the sensor cap of HM Digital’s PH-80 handheld pH and temperature meter. The cap combines space for storage solution with a flexible protective enclosure around the glass sensor. Exterior ribs provide a grip for fitting and removing it from the meter body.

Form, fit, and material

The translucent amber cap makes its depth and internal volume visible against the satin white housing. The fitted opening follows the body profile, while the ribbed grip and rounded rim give the removable component a clear physical identity.

Refined views and floating studies

The updated studio views show the assembled product, interface, and cap details. Floating compositions and selective-focus close-ups explore the same design through light, translucency, and surface transitions.

Original design project: 2019. Portfolio visualization update: 2026. The concept images are presentation studies of the cap redesign.

Three-quarter studio view of the PH-80 pH meter with a white body and ribbed amber sensor cap. — Refined product — The complete meter pairs a satin white housing with a translucent amber sensor cap.

Front view of the PH-80 with its LCD, three controls, and amber sensor cap. — Refined product — A straight-on view shows the meter proportions, compact interface, and cap-to-body fit.

Close-up of the PH-80 LCD and Power, Temp/Cal, and Hold controls on the white housing. — Refined detail — The LCD and three labeled controls remain integrated into the existing meter body.

Selective-focus studio close-up of the PH-80 translucent amber sensor cap and grip ribs. — Refined detail — Translucency reveals the cap volume, while exterior ribs define the grip area.

Floating three-quarter presentation of the PH-80 meter with its amber sensor cap in the foreground. — Floating study — The assembled design is presented without a ground shadow to emphasize the body-to-cap relationship.

Opposite floating three-quarter view of the PH-80 showing its white housing, controls, and amber cap. — Floating study — An opposite angle shows how the cap follows the meter silhouette and wraps around its sensor end.

Close-up floating view of the PH-80 ribbed amber cap, fitted opening, and adjacent HM Digital branding. — Floating detail — Rib spacing, the fitted opening, and the rounded cap rim are visible in one close view.

Diagonal floating detail of the PH-80 display and three controls on the satin white body. — Floating detail — A diagonal composition brings the display, button labels, and housing transitions into focus.

Shallow-depth-of-field view of the PH-80 amber sensor-cap rim with the white meter body receding into blur. — Selective-focus study — Focus on the amber rim draws attention to the protective cap and its rounded edge.