I have two lock-in amplifiers for sale:
#1: Ortec Brookdeal 9503; one phase; options: oscillator, working condition.
#2: Ortec Brookdeal 9502; two phase; options: oscillator, notch and bandpass filter, noise measurement, Ultra low noise preamplifier; working condition.
The instruments may need cleaning of some swithes but at the moment are usable.
Each instrument is sold separately. If You are interested, please send me a PM marking the # of the instrument with proposed price.
Sales invoice can be issued if needed.
Shipping cost within EU should not exceed 65EUR.
I will wait for one week for the final decision.