Keithley 610R Electrometer Ultra Low Current Meter Laboratory Instrument

HP 3456A Digital Voltmeter 6½ Digit Precision Bench Multimeter Hewlett Packard

Triton Technology Inc. - Model: 200-1000 System Six Mainframe

Agilent HP 8163A Lightwave Multimeter Mainframe w/ 2 Pc 81531A Power Sensors

Tektronix TM503 3-Slot Power Module Mainframe With DM505, DM501 & DM501A

HAMEG HM8001‑2 Mainframe + HM8012 4¾‑Digit Programmable Multimeter + HFMS Module

HP 8153A Lightwave Multimeter Mainframe W/ 81531A 81536A Power Sensor 800-1700nm