Small Hardware:

1.) EG&G Princeton Applied Research Photon Counter (Model 1120)

2.) Perkin Elmer SED Preamplifier (Model PHI 97)

3.) Perkin Elmer V/F Preamplifier (Model 96A)

4.) Perkin Elmer ABS Current Preamplifier (Model 20-250(2of2))

Large Hardware:

1.) Perkin Elmer Digital Gauge Control III

2.) Perkin Elmer Digital AES Control

3.) Perkin Elmer Electron Multiplier Supply

4.) Perkin Elmer Signal Processor

5.) Perkin Elmer Power Supply

6.) Perkin Elmer Ion Gun Control

7.) Some Sort of Custom, Water Cooled Emitter (MDC Mfg. Inc.)