Product Selection Guides

Janis Research offers a complete range of both cryogen-cooled and cryogen-free equipment for low temperature research.  Please refer to the charts below for help in choosing the right system for your application, or contact a Janis sales engineer for assistance.  Our expert staff includes many with advanced degrees and extensive field experience, covering a broad range of applications.  A Janis engineer will work closely with you to help choose the system most ideally matched to your experimental requirements and budget. 

Questions to help you decide the best equipment for your application.
Including:
Why choose a cryogen-cooled cryostat?
Reasons to choose sample in vacuum
Reasons to choose sample in vapor

Laboratory Cryosystems Selection Guide - using operating temperature range

Laboratory Cryogenic Systems Guide - using various specifications

Click on the model names in the chart below to go to those pages. 

Why choose a cryogen-cooled cryostat?

The choice of cryogen cooling vs. mechanical cooling is a function of several factors, the most important of which will depend on each customer's individual requirements.  Reasons to choose a cryogen-cooled system include:

• Low initial purchase price

• Inherently lower vibration

• Lower base temperatures

• Faster cool down with most models

• Acoustically quiet

• Greater flexibility in design parameters

• No scheduled maintenance requirements

Reasons to choose sample in vacuum:

• Lowest purchase and operating cost

• Simplest system design

• Faster cool down time

• Fewer windows in the optical path

Reasons to choose sample in vapor:

• Fastest sample exchange time

• Effectively cools low thermal conductivity samples (e.g. powders, liquids)

Note: These are general guidelines only.  There are often several suitable cryostat options for a particular application.  Contact Janis for detailed information.

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Laboratory Cryogenic Systems Guide
		ST	STVP	SVT	VT	IMMERSION	VNF	VPF	CCR	SCON
Useable Cryogen	Liquid Nitrogen
	Liquid Helium
Temperature Range	<2 K to 77 K
	77 K to 325 K
	325 K to 500 K
	500 K to 600+ K
Sample Environment	Vacuum
	Vapor/Liquid
	Exchange Gas
Cryogen Usage liters/hour	LHe at 4.2 K	0.5	1.1	0.3	0.3	0.15	N/A	N/A	N/A	0.3
	LHe at 100 K	0.1	0.2	0.2	0.4	N/A	N/A	N/A	N/A	0.3
	LN2 at 100 K	0.1	0.2	0.1	0.2	0.1	0.2	0.1	N/A	N/A
Cryostat hold time (hours)		N/A	N/A	8	6	8	6-8	5	N/A	12
Initial cool-down time (min.)		15	15	60	60	60	30	15	60	120
Sample exchange time (min.)		30	5	5	20	10	5	30	75	5
Standard model available     Available as an option     Not available <4 K NOTE: Above are approximate values for basic models and vary depending on the exact configuration.