Neural Probes · A-Series (Polytrode & Tetrode)
Tetrode 4-Shank 32-Channel Probe, 6.937 mm
Sites clustered rather than spread — polytrode and tetrode groups a sorter can separate
Four long shanks side by side, with sites grouped in tetrodes at intervals, for unit isolation at set depths. Among the 371 probe designs in the design space it is mid-range: 32 sites (a common choice — 155 of 369), 6.9 mm shanks (61st percentile of the 366 measured), a 0.21 mm-deep site array (13th percentile), 231 sites/mm² (50th percentile) and a 0.41 mm³ neural interface (26th percentile).
Small sites read a local patch at higher impedance, sharpening single-unit isolation, packed densely enough to track a unit across neighbouring sites. The long shanks reach deep targets.
Orders as a probe-plus-package assembly, in 5 package configurations. Silicon 15 µm thick. Z-coat available. Research use only.
SKU prb_ahc--a4x2_tet_7mm150_200_121 · Neural Probes in the webstore
Specifications
| Channels | 32 |
|---|---|
| Shanks | 4 |
| Shank length | 6.937 mm |
| Site layout | Tetrode |
| Site area | 121 µm² |
| Site pitch | 24 µm |
| Vertical span | 210 µm |
| Substrate | Silicon |
|---|---|
| Site material | Iridium |
| Thickness | 15 µm |
| Neural interface volume | 0.412 mm³ (higher than 26% of 371 designs) |
| Site coverage density | 230.5 sites/mm² (higher than 50% of 371 designs) |
| Brain coverage density | 77.6 sites/mm³ (higher than 77% of 371 designs) |