R. G. Hansen & Associates' demand flow cryostat is a miniature, self-regulating device designed primarily to minimize consumption of high-pressure gas. Operating times are increased by at least a factor of 2 at low tank-charge pressures (2,000 psi), and by factors of 10 or more at high pressures (5,000 to 10,000 psi), as compared with fixed orifice cryostats.

Relatively small supply tanks can be used with demand flow cryostats to decrease system weight and volume, and extended operating times can be obtained with conventional-sized tanks. A tank pressure regulator is not required. Demand flow cryostats are equipped with solid particle inlet filters which prevent accidental plugging from dust or dirt.

Temperature

Fluctuation

System performance can be affected by temperature fluctuations of the demand flow cryostat. Our standard line of demand flow cryostats, however, shows temperature fluctuations of less than 1 K/second.

Gas Supply

The gas supply to the cryostat is normally commercial, high purity, extra dry, water-pumped Nitrogen, MIL-N- 6011, Grade F. Units are also available for use with Argon (87K).