Fusion Double-Sided Probes
360° electrode coverage, 2× active site density — drop-in compatible with existing DAQ systems
2× Site Density, Same Footprint
Double-sided electrode placement provides 360° coverage and doubles active sites without increasing tissue displacement. Drop-in compatible with existing DAQ and analysis workflows.
Why Choose Fusion Probes
Double-sided electrode architecture for demanding recordings
360° Surround Sampling
Electrodes on both substrate faces eliminate blind spots inherent in single-sided designs.
Drop-In DAQ Compatibility
Standard connectors — works with XDAQ, SmartBox, Open Ephys, Intan pipelines.
2× Site Density per Insertion
Double the recording sites without increasing probe cross-section or tissue displacement.
More Data per Animal (3Rs)
Higher site density per insertion supports Reduce, Refine, Replace principles.
5,000+ Peer-Reviewed Citations
NeuroNexus probes cited across the global neuroscience research community.
100+ Catalog Designs + Custom
Off-the-shelf or custom Fusion probes tailored to your neural target.
Technical Specifications
32–128 channels, acute and chronic form factorsChannel counts from 32 to 128, 1–8 shanks per probe, acute (stiff) and chronic (flexible cable) form factors.
Channel Configuration
32, 64, or 128 channels with linear (laminar) or polytrode site layouts.
- 1–8 shanks per probe
- Implantable length: 3–10 mm
Physical Properties
Substrate: 30 µm or 100 µm. Iridium sites (177 µm², 0.5–1.5 MΩ @ 1 kHz).
- Z-coat site material available as custom option
- Double-sided electrode placement (360° coverage)
Form Factors
Acute (stiff): 50+ insertion cycles. Chronic: 30 mm flexible cable.
- Both form factors microdrive-compatible
DAQ Compatibility
Standard headstage connector across all F-series packages.
- XDAQ, SmartBox, Open Ephys, Intan, others
- No specialized software required
F-Series Package Options
F = acute, FH = integrated headstage, FW = wide/dual-output
Validated by Leading Researchers Worldwide
Join 1000+ institutions using NeuroNexus probes
Proven in Research
5,000+
Peer-reviewed publications citing NeuroNexus probes
100+
Existing Fusion probe designs available off-the-shelf
1,000+
Research institutions worldwide using NeuroNexus electrodes
30+
Years of expertise in silicon probe microfabrication
Application Areas
Double-sided electrodes open spatial sampling and multi-region studies constrained by site count on single-sided probes.
Laminar Cortical Profiling
All cortical layers simultaneously. CSD analysis and layer-specific firing patterns.
- Captures activity gradients single-sided probes miss
Population Dynamics
2× site density enables high-yield single-unit isolation without more tissue displacement.
Multi-Region Recording
Multi-shank Fusion probes span brain regions with 360° sampling at each site.
Chronic Neural Interfaces
Flexible packages for freely moving experiments. Higher density adds signal redundancy.
Radiens + Fusion: Artifact-Free from Probe to Software
Fusion probes solve the photoelectric artifact problem at the probe level. Radiens carries it through: event-locked analysis aligns optical pulse timing to sorted spikes with sub-millisecond precision. The same platform handles acquisition quality monitoring, opto-ephys analysis, and long-term signal tracking for chronic Fusion implants.
Probe-Aware Geometry
Radiens loads the Fusion probe's double-sided electrode map automatically. Both recording faces visualized in their anatomical context.
Opto-Ephys Event Analysis
Light-pulse timing, spike rasters, response latency, and modulation index — standard opto-ephys metrics computed in Radiens without custom scripts.
Signal Quality for Double-Sided Arrays
Per-site SNR monitoring across both probe faces. Verify recording quality on the fiber-facing and opposite-facing electrode populations independently.
Choose Your Form Factor
Fusion probes available in acute and chronic configurations
| Feature | Fusion Acute (Stiff) | Fusion Chronic (Flexible) |
|---|---|---|
| Primary Use Case | Acute/terminal recordings | Chronic implants, freely moving |
| Experiment Duration | Single session or repeated acute | Weeks to months post-implant |
| Construction | Rigid assembly | Flexible cable (30 mm) |
| Handling | Repeated insertion/withdrawal | Single implant + long-term stability |
| Microdrive Compatible | ✅ With insertion assist tooling | ✅ Standard compatibility |
| Reusability | 50+ insertions per probe | Single chronic implant |
| Cost per Experiment | Very low (50+ reuses) | Single use (long duration) |
| Signal Stability | Excellent within-session | Stable across weeks/months |
| Connector Type | Standard headstage | Standard headstage + strain relief |
| DAQ Compatibility (No Retooling) | ✅ All standard systems | ✅ All standard systems |
| Software Requirements | Standard analysis pipelines (no retraining) | Standard analysis pipelines (no retraining) |
Fusion Probes — FAQ
What double-sided Fusion probes are and why they help.
What is a Fusion probe?
Double-sided silicon probes with recording sites on both faces for 360° coverage and improved single-unit isolation.
Why double-sided?
Sites on both faces sample a larger tissue volume and improve spike sorting and unit isolation compared with single-sided probes.
How do I choose a Fusion probe configuration?
Browse available Fusion probes in the webstore, or request a custom design from an application scientist.
Find Your Configuration
Select Your Configuration
Four parameters define your configurationChannel count, shank count, site layout, and form factor. All configurations work with existing DAQ systems.
Channel Count
32, 64, or 128 channels based on spatial sampling and DAQ capacity.
Shank Configuration
Single shank or multi-shank (2–8) for simultaneous multi-region sampling.
Site Layout
Linear (laminar) for layer profiling or polytrode for unit density.
Form Factor
Acute (rigid) for terminal experiments or chronic (flexible) for freely moving.
2× site density, same DAQ, same analysis pipeline
Additional Resources
What you need to get started with Fusion probes
Papers citing the use of Fusion Probes
Fusion Probes in Context
See how Fusion probes fit optogenetic stimulation experiments, artifact-free opto-ephys, and combined recording workflows.
Talk to a scientist about Fusion Probes
These are advanced configurations — tell us your experiment and we'll help you get it right.