20 µL / 500 µm reaction chamber — our footprint (Fluidic 584)

Internal geometry — X-ray

See-through internal view. Left: fluid footprint in plan, true scale (teal); ports show as the wider circles. Right: isometric of the internal void, vertical z exaggerated 3× for visibility. The exterior is an opaque solid block — this is what is inside it.

Download: PNG (x-ray)

Longitudinal section & exterior

Longitudinal y=0 section of 20 µL / 500 µm reaction chamber — our footprint (Fluidic 584): grey solid, white voids

Exterior isometric render of 20 µL / 500 µm reaction chamber — our footprint (Fluidic 584) (the outside of the CAD model, drawn opaque)

Longitudinal section at y=0 (left): grey = solid, white = fluid voids. Exterior isometric (right): the outside of the CAD model, drawn opaque. Click either for full resolution.

Download: PNG (section) · PNG (top) · PNG (iso)

Description

A single monolithic resin-SLA block (Phrozen Sonic Mighty 12K, 19 × 24 µm non-square) with one 20 µL, 500 µm-deep stadium reaction chamber, two straight 0.5 mm feed channels on the same floor, and two Ø1.5 mm vertical access bores to the top surface. The vendor part is a COC body sealed with a foil lid — this is a different monolithic construction that reproduces the chamber's fluidic spec only. Footprint 27.86 × 7.0 × 2.3 mm.

The footprint here is ours, not the vendor’s. microfluidic ChipShop publishes only the chamber volume (20 µL), its depth (500 µm) and the port count. Those are the functional specification of a reaction chamber and the model reproduces them exactly. The shape is not on record: we chose a 4 mm chamber width and solved the stadium length from area = volume ÷ depth, which is why the chamber reads 27.86 mm long here. It will not fit a ChipShop holder and is not dimensionally interchangeable with the vendor part.

Verification

metric	value
Chamber volume — mesh	19.9955 µL (−0.022% vs 20 µL vendor)
Chamber depth — vendor	500 µm
Footprint (L × W × H) — OUR design	27.86 × 7.00 × 2.30 mm OUR DESIGN
Chip watertight	True
Chip Euler number	0 — genus-1: one cavity, two vents
Void connected bodies	1
Min feature vs Phrozen 12K X (px_min = 500/19)	26.32 px
Min feature vs Phrozen 12K Y (px_min = 500/24)	20.83 px

All geometry checks run with trimesh (merged vertices) on the exported STLs. See the bundled README for the full method.

Source & print adaptation

Chamber (source → ours): 0.50 mm deep — as published; no print enlargement applied
Chamber volume: 20 µL published / 19.9955 µL in the model (mesh)
Target printer: Phrozen Sonic Mighty 12K — 19 µm (X) × 24 µm (Y), non-square
Source: microfluidic ChipShop — Fluidic 584 (vendor product page)

Source dimensions are what the originating design publishes; ours are what our CAD model is drawn at. Where the two are the same number, no feature was resized to print. No public URL for the source is on record in this repository, so it is cited as plain text rather than linked.

Provenance & caveats

Vendor-attributed: the 20 µL chamber, 500 µm depth and 2 ports are from the vendor product page. OUR design (not the vendor’s): the footprint (27.86 × 7.0 × 2.3 mm), the stadium aspect, and the straight feed channels + cylindrical ports. The vendor TDS is robots-blocked. Ports = straight bores, standing in for the vendor’s MFCS Mini Luer sockets. Status — Phrozen Sonic Mighty 12K design, checked in CAD: the geometry is watertight and volumetrically checked in CAD — see the Verification table above for the numbers.

Files to download

SCADchamberchip_f584.scad11.8 KBDownload
STLchamberchip_f584.stl208.0 KBDownload
STLvoid_chamberchip_f584.stl205.9 KBDownloadFor inspection, not for printing: the fluid network, every space that holds liquid, as a solid.
PNGchamberchip_f584_xray.png172.5 KBDownload
PNGchamberchip_f584_section.png23.2 KBDownload
MDREADME.md1.2 KBDownload