Neural Probes · A-Series (Polytrode & Tetrode)
Tetrode 4-Shank 32-Channel Probe, 2.5 mm
Sites clustered rather than spread — polytrode and tetrode groups a sorter can separate
Four short shanks side by side, closely spaced for coverage within one structure, 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), 2.5 mm shanks (8th percentile of the 366 measured), a 0.6 mm-deep site array (31st percentile), 83 sites/mm² (33rd percentile) and a 0.63 mm³ neural interface (49th 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 short shanks suit superficial targets.
Orders as a probe-plus-package assembly, in 2 package configurations. Silicon 15 µm thick. Z-coat available. Research use only.
SKU prb_ahc--a4x2_tet_2p5mm_550_200_121 · Neural Probes in the webstore
Specifications
| Channels | 32 |
|---|---|
| Shanks | 4 |
| Shank length | 2.5 mm |
| Shank separation | 200 µm |
| Site layout | Tetrode |
| Site area | 121 µm² |
| Site pitch | 18 µm |
| Vertical span | 596 µm |
| Substrate | Silicon |
|---|---|
| Site material | Iridium |
| Thickness | 15 µm |
| Site geometry | Estimated from the design name and similar designs |
| Neural interface volume | 0.628 mm³ (higher than 49% of 371 designs) |
| Site coverage density | 83.0 sites/mm² (higher than 33% of 371 designs) |
| Brain coverage density | 50.9 sites/mm³ (higher than 57% of 371 designs) |