Nereid · Interface Catalog Rev A

Nereid Program · Rev A

Nereid

Eighteen submersible touch-interface designs for a sealed phone — built to the same depth and weight math, different sensing channels.

18Designs · 4 families

6–100 mDepth range

96–205 gWeight targets

810HMIL-STD design basis

The problem

Phones die in water. Dive computers don’t show your apps.

Nereid puts a sealed dry-air pocket over the phone’s own screen, with a water-immune sensing layer on the outside. One physics stack — many interfaces.

Capacitive touch fails underwater and through gloves
Hard cases usually kill the screen as an input surface
Mission profiles need different trade-offs: weight, depth, precision, hands-free

Shared architecture

Same envelope. Different signal path.

Every card in the catalog fixes on sensing architecture, construction, a weight budget from material densities, sealing, and the one trade-off that decides whether you’d choose it.

Dry-air pocket over phone glass

Outer sensing water-immune

First-principles weight targets

810H immersion / shock / salt fog goals

Force / strain Whole window as a load path — Family A

Alt. physics Magnetic, EMR, acoustic, resistive, gap-cap — B

No window sense Keys, puck, IMU, voice — where weight drops — C & D

Catalog map

Four families. Eighteen interfaces.

A · FORCE

Force-Sensed Rigid

Four corner load cells. Housing material is the design question.

A1 · A2 · A3 · A4

B · SENSE

Alternative Sensing

Same shell envelope — swap the physics for gloves, precision, or cost.

B5 · B6 · B7 · B8 · B9

C · CONTROL

Control Surfaces

Window becomes a viewport. Keys, puck, tilt, voice — real weight savings.

C10 · C11 · C12 · C13

D · MISSION

Non-Rigid & Mission

Packability, 100 m depth, float, torso, wrist nav.

D14 · D15 · D16 · D17 · D18

Family A

Force-sensed rigid housings

A1 Lightline Mg — lightest full-aperture, 153 g
A2 Carbonshell — stiffness per gram, RF window
A3 Skeleton — field-swap window cartridge
A4 Titan-20 — max abuse, spinel, 205 g

A1153 g · 6 m

A3168 g · 10 m · flagship

A2147 g · CFRP

A4205 g · 20 m

Family B

Alternative sensing

Trade resolution or gestures for waterproof magnetics, acoustics, or thirty-year industrial reliability.

B5 Hall-GloveThick gloves · magnetic

B6 Stylus-EMRSub-mm precision

B8 ResistiveShip-first · lowest risk

B7 Lamb-Wave · clearest aperture

B9 Gap-Cap · weeks of standby

Families C & D

When the window stops sensing

C12 Tilt-Cursor96 g — lightest in catalog

D15 Oilfill-100100 m — real depth

D18 GauntletWrist nav + mechanical compass

C10 Crownpad · fewest failure modes

C11 Tether-Puck · phone stays stowed

C13 Voice-PTT · hands-free

D14 Rolltop · packs flat

D16 Floatline · won’t sink

D17 Chestboard · MOLLE torso

Decision surface

What you’d actually ship first

Priority	Pick	Why	Weight	Depth
Prove the category	B8 Resistive	Lowest tech risk & cost	144 g	6 m
Fielded product	A3 Skeleton	Swap scratched glass in under a minute	168 g	10 m
Minimum mass	C12 Tilt	Deletes the sensing stack	96 g	6 m
Real diving depth	D15 Oilfill	Pressure compensation, not thicker walls	178 g	100 m
Max abuse	A4 Titan-20	Spinel + Ti, past standard drop heights	205 g	20 m

Deliverables

The catalog is built — not just written.

18 concept blueprint renders
18 printable SVG orthographic sheets
56 STL + 56 STEP prototype models
BOM, assembly, and print guide per design

Open interactive catalog

112

CAD files ready for FDM / CNC soft tooling — PETG or ASA shells, COTS seals, pressure-test before water.

Recommended path

Three moves from catalog to hardware

01

Print B8 + C10

Fastest fit-check shells. Validate seal geometry and phone cavity on the bench.

02

Pilot A3

Field-replaceable cartridge is the product story — prove the two-seal interface.

03

Gate depth later

Oilfill-100 and Titan-20 only after recreational 6–20 m stack is proven.

Nereid Program

Use the phone. Keep it dry.

Interface Catalog Rev A — engineering targets from first-principles geometry. MIL-STD-810H methods as design goals, not certified results.

D14 manufacturing approval D15 manufacturing approval Customer love film Tech demos Browse catalog