The Keithley 7168 is an 8-channel, 2-pole card with <30nV of thermal offset. The Keithley 7168 will switch any one of eight signals to one output in less than 3ms. Channel offset leakage current is <50pA at 23°C. Keithley also offers the Model 78B, which includes the 7168 Nanovolt Scanner Card, Model 7001 80-Channel Scanner mainframe, and Model 2182A Nanovoltmeter. When the 7168 is used with the Model 2182A, the noise and drift performance of the 2182A is not degraded.