BR Style Brain Microdialysis Probes

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The œBR style microdialysis probe is BASi™s most popular style brain microdialysis probe. This concentric microdialysis probe is stocked in two different membrane lengths, 2 mm and 4 mm. The cannula length is optimized to reach anywhere in the rat brain. Custom membrane and cannula lengths are available. If you are working with mice, see the MBR style microdialysis probes.

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Ordering Information


BR-2 (2 mm membrane) Brain Microdialysis Probes
BR-4 (4 mm membrane) Brain Microdialysis Probes

Part Number

MD-2200, BR-2, 2mm membrane
MD-2204, BR-4, 4mm membrane


Coated fused silica

Probe Volume

2.1 to 2.3 µL (BR-2 or BR-4)


Use with optional BR intracerebral guide cannula, or mount directly on skull using acrylic cement. Commonly used for rats, hamsters, and guinea pigs.  Non-metallic, can be used for NMR imaging.


PAN. 30KDa MWCO, 320µm OD, 2 or 4 mm lengths in stock. Custom length probes available



OD 320µm

ID 220µm

Probe Cannula Diameter

OD 510µm

ID 360µm

Probe Cannula Length

15 MM

Probe Cannula Length
when in BASi® guide cannula
10 mm

Head Diameter

OD 6.4mm

Tubing Inlet/Outlet

OD 635µm

ID 254µm