The Keithley 7166 Mercury Wetted Relay Card provides either 10 separate switches using 10 two-pole relays or, with all jumpers installed, 10 inputs to one output or one input to 10 outputs switched. Features of the mercury wetted relay card include quick disconnect terminal blocks for each channel, removable jumpers to configure any switch to be separate, isolated in/out circuit, long switch life with low stable contact resistance, and bounce-free switching.