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

EG&G PAR Princeton Applied Research 5204 Lock-In Analyzer

EG&G Princeton Applied Research Model 5210 Dual Phase Analog Lock-In Amplifier

EG&G Princeton Applied Research 162 Boxcar Averager

EG&G PARC Princeton Applied Research Model 128A Lock in Amplifier .5Hz - 100kHz

EG&G Princeton Applied Research 173 Potentiostat Galvanostat, Turns On, Read