# channelchip_f145 — reference-chip bundle (channel-chip family)

ADAPTATION — **NOT A REPLICA** — of microfluidic ChipShop *Fluidic 145*.

One straight rectangular channel, 50 µm deep × 50 µm wide, 58.5 mm
port-to-port, in a monolithic resin-SLA block with two Ø1.5 mm vertical access bores.

## Provenance / honesty

- **Vendor-attributed (product page):** channel cross-section H × W = 50 × 50 µm,
  channel length 58.5 mm, and the fact that the real part carries
  **4 identical parallel channels**.
- **OURS (not the vendor's):** the chip footprint (63.0 × 4.5 × 1.85 mm).
- **NOT REPRODUCED:** the 4-channel array. This models ONE channel. The vendor
  publishes no channel pitch and no chip outline, so copying the array would require
  inventing the spacing.
- **Construction differs:** the vendor part is a sealed polymer body + lid; this is a
  monolithic print.
- **Ports:** straight cylindrical bores. They stand in for the vendor's MFCS Mini Luer sockets.

## Verification (trimesh, merged vertices)

| metric | value |
|---|---|
| channel volume — analytic | 0.1463 µL |
| channel volume — mesh | 0.1473 µL |
| Δ (mesh − analytic) | +0.68% (uniform 0.4 mm boolean overrun) |
| void watertight / bodies | True / 1 |
| chip watertight / Euler | True / 0 |
| px_min @ 19 µm/px (Phrozen 12K, X) | 2.63 px |
| px_min @ 24 µm/px (Phrozen 12K, Y) | 2.08 px |
| px_min @ 7.6 µm/px (BYU Nordin) | 6.58 px |
| tier | not-printable-enclosed |

**Phrozen Sonic Mighty 12K design** — geometry verified in CAD.

## Rebuild

    /usr/local/bin/python3 build_batch2.py     # OpenSCAD 2021.01 + trimesh 4.12.2