Fluke I400S AC Current Clamp. The Fluke i400s Current Clamp works with instruments measuring ac millivolts. Those instruments need to have standard BNC connector for coupling with i400.
Fluke i400s features input impedance of greater than or equal to 1 M ohm in parallel with a maximum of 47 pF. The Current Clamp can also be used with digital multimeters using a BNC-to-banana jack adapter. Mfg part Fluke 2277202.
Fluke parts and accessories.
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to 
