Sold Out Compare Quick view Keithley Model 140 Precision Nanovolt Dc Amplifier MSRP: Now: $375.00 Was: Condition: Used : An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. Notes: No means to fully test. We test products requiring power by using... BZA634831 MSRP: Now: $375.00 Was: Sold Out Compare Quick view Qty in Cart: 0 Price: MSRP: Now: $375.00 Was: Subtotal: Sold Out