Neural Probes · A-Series (Polytrode & Tetrode)
4-Shank 128-Channel Probe, 5 mm
Sites clustered rather than spread — polytrode and tetrode groups a sorter can separate
Four mid-length shanks side by side, spread for lateral coverage across columns, with sites staggered in five columns so neighbouring sites see the same units. Among the 371 probe designs in the design space it sits at the top: 128 sites (96th percentile), 5 mm shanks (a common choice — 107 of 363), a 4.38 mm-deep site array (95th percentile), 29 sites/mm² (9th percentile) and a 3.66 mm³ neural interface (97th percentile).
Mid-sized sites balance unit isolation against field-potential pickup, packed densely enough to track a unit across neighbouring sites. The mid-length shanks reach structures a few millimetres down.
Orders as a probe-plus-package assembly, in 14 package configurations, 3 of them microdrive-compatible. Silicon 15 µm thick. Z-coat available. Optical stimulation runs from a separate laser or LED source. Research use only.
SKU prb_ahc--a4x32_poly5_5mm_40s_300_225 · Neural Probes in the webstore
Specifications
| Channels | 128 |
|---|---|
| Shanks | 4 |
| Shank length | 5 mm |
| Shank separation | 300 µm |
| Site layout | Poly5 |
| Site area | 220 µm² |
| Site pitch | 20 µm |
| Vertical span | 4383 µm |
|---|---|
| Substrate | Silicon |
| Site material | Iridium |
| Thickness | 15 µm |
| Neural interface volume | 3.664 mm³ (higher than 97% of 371 designs) |
| Site coverage density | 29.2 sites/mm² (higher than 9% of 371 designs) |
| Brain coverage density | 34.9 sites/mm³ (higher than 40% of 371 designs) |