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, closely spaced for coverage within one structure, with sites staggered in two columns so neighbouring sites see the same units. Among the 371 probe designs in the design space it is mid-range: 128 sites (96th percentile), 5 mm shanks (a common choice — 107 of 363), a 0.73 mm-deep site array (38th percentile), 273 sites/mm² (54th percentile) and a 0.7 mm³ neural interface (56th 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 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 not available on this close-spaced poly layout. Optical stimulation runs from a separate laser or LED source. Research use only.
SKU prb_ahc--a4x32_poly2_5mm_23s_200_177 · Neural Probes in the webstore
Specifications
| Channels | 128 |
|---|---|
| Shanks | 4 |
| Shank length | 5 mm |
| Shank separation | 200 µm |
| Site layout | Poly2 |
| Site area | 177 µm² |
| Site pitch | 23 µm |
| Vertical span | 728 µm |
|---|---|
| Substrate | Silicon |
| Site material | Iridium |
| Thickness | 15 µm |
| Neural interface volume | 0.703 mm³ (higher than 56% of 371 designs) |
| Site coverage density | 272.7 sites/mm² (higher than 54% of 371 designs) |
| Brain coverage density | 182.1 sites/mm³ (higher than 96% of 371 designs) |