Cold Facts Digital – The go-to place for Cryogenics and Superconductivity

Cryostat for storing fish samples at -20 degrees C

We are a small Food Chemistry Laboratory functioning within the Seychelles Bureau of Standards. We wish to purchase a cryostat for the purpose of storing fish samples at *-20ºC* prior to the analysis of Histamine in the tissue of Tuna by HPLC.

Looking for information on the liquid nitrogen level controllers industry.

I am currently researching liquid nitrogen level controllers and was wondering if you had any information on the industry (numbers sold per annum, and any systems that don’t involve a solenoid.) Your help would be greatly appreciated.

Cryogenic data poster

I would like to get several copies of the wonderful “Cryogenic Data” poster that was produced by the Culham Laboratory in 1970. Does anyone know from whom they can be obtained?

Thermal conductivity of zirconia and Y-stabilized zirconia

We have been searching for information about the low temperature (4K -> 77K) thermal conductivity of zirconia and Y-stabilized zirconia without much success. Is anyone aware of sources for this information?

Portable equipment for an iqf system?

We are interested in purchasing small portable equipment for an iqf system. We want to process between 500 to 1000 Kg/day of berries and strawberries. Can you please let us know about equipment that can meet our requirements? Please specify the installation area we will need plus additional facilities and...

Transporting tank for Liquid Helium with special option for filling cylinders with gaseous helium

We are looking for a transporting tank for Liquid Helium with the special option for filling cylinders with gaseous helium. This unit should transport LHe and have the ability to fill 40-liter cylinders with helium at pressures up to 150-200 bar.

Latest in Defining Cryogenics

Dewar

A dewar is a type of cryostat named after Sir James Dewar, the researcher who first developed the concept of a vacuum insulated container with silvered walls to reflect thermal radiation. Dewar was the first to liquefy hydrogen, and he created the device to store his discovery. The thermos bottle...

Stirling and Gifford-McMahon Cryocoolers

Stirling and Gifford-McMahon (GM) cryocoolers are two of the most commonly used cryocoolers in cryogenics. Both devices have a significant industrial base and operate at a wide range of temperatures and capacities. The thermodynamic cycles for both of these cryocoolers are quite similar. The Stirling cycle consists of a compressor,...

Liquefied Natural Gas (LNG)

A significant commercial application of cryogenics is the liquefaction, transport and storage of natural gas. Liquefied Natural Gas (LNG) is generally 95 percent methane with a few percent ethane and much lower concentrations of propane and butane. LNG liquefies at 111.6 K. Unlike many applications of cryogenics, the motivation for...

Latest in Cryo Central

Food Processing

Cryogenics and Food The industrial gas industry provides a host of products and services related to food. The various gases have useful and sometimes fascinating applications in food industry. “The food industry is not a homogenous industry. The needs of customers processing hamburger vs. poultry vs. strawberries vs. seafood, for...

Primary Standards

Elie K. Track Hypres, Inc. elie@hypres.com http://www.hypres.com/ Primary standards involve the exact definition and realization of units of measurement for various quantities, time, length, mass, voltage, resistance, current, etc. International agreements based on the latest scientific knowledge define those units, and their realizations vary depending on the unit itself. For...

Shrink Fitting

Robin A. Rhodes Cryogenic Institute of New England, Inc. rrhodes@nitrofreeze.com Shrink fitting, (or “compression fitting” as it is sometimes called), is a method used to insert a pin or bushing into a housing or other assembly requiring an extremely tight tolerance fit. It can be used as an alternative to...

Telecommunications

From the Winter 2004 issue of Cold Facts magazine The recent M-Calc IV — 4th Industry Assessment workshop discussing military and commercial applications for low-cost cryocoolers, held in November in San Diego, highlighted progress being made in cryogenics as applied in telecommunications. The reliability and long lifetime of projects now...

Latest in Ask the Experts

Calibration curve for pt100 below 70K?

Does anyone have a calibration curve for pt100 below 70K?

Source for small gas liquefier/cryocooler?

I would like to acquire a used gas liquefier/cryocooler for use in my non-profit project to build a high-performance natural gas (methane) powered car. I am interested in liquefying piped natural gas (methane) into LNG (about 120K or -154 degrees).

Convert PSI or Torr to Degrees Kelvin?

When using helium vapor bulbs under 30K, what is the formula to convert from PSI or Torr to degrees Kelvin?

Searching for a company to make a specific kind of cryogenic chamber

I am writing a proposal to do some deep space simulations of mechanical vibrations at cryogenic temperatures. For the research, I will need to obtain a chamber that has a space of approximately 1700 cubic inches (or a 12in. cube) that also has an optical viewing window.

CATEGORIES