We have developed a passive Electrical Rotary Joint usable for electrophysiological experiments that can be combined with fiber-optic rotary joints (1x1 or 1x2) to bring light to and/or from the sample. Its 7.2 mm through hole in the center is sufficient for passing fiberoptic patch cords with M3 connectors or ferrule/sleeve type connectors. It is also convenient for fluid tubing allowing drugs administration during electrophysiological experiments with freely-moving animals. Our Electrical Rotary Joint has a torque of 1.8 mN·m for 12 electrical contacts, this is acceptable for use with rats or larger animals. They are optimized to offer the best electric signal with the lowest torque, given that stable electrical transmission with small resistivity variations during rotation requires the increase of contact areas between each electrical contact. For small animals like mice, we recommend our Assisted Electrical Rotary Joints to remove the torque originating from the friction of the electrical contacts.

Items includes : 

• 1 Passive Electrical Rotary Joints - 12 contacts
• 1 Holder for the Passive Electrical Rotary Joints - 12 contacts (If the Electrical Rotary Joints is used only for electrophysiology, without any additional fiberoptic rotary joints, a compatible holder is included, else a holder allowing the mounting of an Electrical Rotary Joint with a Fiber-optic Rotary Joint (1x1 or 1x2) are included
• 1 adapter allowing the fixing on the optional horizontal cable holder

• A Gimbal Holder for FRJ to allows pivoting the rotary joint along two additional axes to further reducing the mechanical stress on the animal.
• A horizontal cable holder to keep cables off-center.
• Mono Fiber-optic Patch Cords
• A Harwin 12 to Omnetics 12 Adapter to allow a Harwin-connectorized rotary joint to be used with an Omnetics-connectorized systems

• The number of electrical contacts does not necessarily equal the number of recording channels.