Model-204 Variable Temperature Optical Closed Cycle Refrigerator System

System Features:

  • <6.5 K to 325 K opera ng temperature range

  • Sumitomo model: CH-204-N coldhead

  • Coldhead cooling power:

  • 2nd Stage: 2.5W @ 10 K (50Hz)

  • 2nd Stage: 3.0W @ 10 K (60Hz)

  • Water cooled compressor Model: HC4E-1 (200V, 50Hz- 208/230V, 60Hz)

  • 10 feet interconnec ng hoses and control cable

  • (4) 1.62” diameter op cal quartz windows

  • Demountable op cal rst-stage radia on shield

  • Demountable op cal outer vacuum shroud

  • 1.50 inch diameter copper sample mount

  • 50 ohm high power heater installed on coldhead

  • (1) 10-pin electrical feedtrhoughs with mate

  • (3) spare blank feedthroughs

  • Reliable Bellows style evacua on valve

  • Vacuum shroud safety pressure relief

  • Copper op cal sample holder

  • Silicon diode temperature sensor installed on refrigerator cold nger

  • Matching silicon diode temperature sensor installed on sample holder

  • Startup toolkit with opera onal manuals

  • One year warranty