Princeton Applied Research PAR 120 LOCK IN AMPLIFIER

^^ PRINCETON APPLIED RESEARCH MODEL 115 WIDE BAND PRE AMPLIFIER (DPA69)

EG&G Princeton Applied Research Model 162 Boxcar Averager Model 164 Integrator

PAR MODEL 114 Signal Conditioning Amplifier W/ 118 Differential Preamplifier S1

Comstron / Adret 6100B 400kHz/600mHz Frequency Synthesizer

EG&G Princeton Applied Research Model 5209 Analog Lock-In Amplifier

Princeton Applied Research PAR 120 LOCK IN AMPLIFIER- For parts/repair

EG & G Princeton Applied Research 273A Potentiostat Galvanostat Lab. Device