The great majority of standard, economical Temperature Chambers on the market are compressor-cooled and are capable of changing Temperature at a rate of one or two or three °C per minute. (This is true across our industry, regardless of supplier). This is a perfectly satisfactory ramp-rate for most applications, and represents a reasonable compromise between ramp rate and control finesse. It also keeps chamber prices affordable.

If you require a faster ramp rate than a few °C/min, either to satisfy a Test Specification, or to quicken up the test cycle time to increase thruput, then there are three general approaches we can take:

1. Boost cooling and heating horsepower. Increase the size of the refrigerant circuits and the compressor(s). Increase the wattage of the heaters. Increase fan output to boost convection. Essentially build a more "muscular" chamber that costs a bit more upfront and will consume more electricity. This approach yields ramp rates in the range of 5°C/min to perhaps as high as 20°C/min.
2. Add a little Cryogenic cooling. Sometimes referred to as a "Boosted" Chamber. By adding controlled injection of Liquid Nitrogen or Liquid Carbon Dioxide during the cooling ramps, we can accelerate the ramp rate.
3. Switch to Cryogenic cooling. A very common approach is to completely forgo any compressors and utilize cryogenic injection exclusively. This enables users to dial in ramp rates anywhere from extremely slow to well north of 50°C/min!

 

Your starting point in finding the right Fast-Rate Temperature Chamber for your needs should be the GB-Series from Russells Technical Products.

The Economical GB-Series is our highest-sales-volume, most-features-for-the-money family of chambers.  In standard configuration, these chambers perform at industry-typical, slow ramp rates. However, the following options are available for faster ramp rate applications:

	Larger Compressor upgrades (some models)
	Higher Wattage heaters
	Liquid N2 or CO2 Boost
	Cryogenic Cooling only        (no compressors at all)

Single-compressor Models (-30C to +177°C)

Cascaded-compressor Models (-68C to +177°C)

Liquid CO₂-cooled  Models (-60C to +177°C)

Liquid N₂-cooled  Models (-100C to +177°C)

Perhaps you have one of the following needs for your Fast Ramp Rate Chamber?

	Larger Size?
	Interior Workspace that is not cubic?
	Remote Compressors or Condensers?
	Extensive Customization?
	Heavier-Duty Compressors & Heaters?

 

Then it's time to consider the "RB-Series" from Russells Technical Products. This is a line of heavier-duty, performance-oriented, workhorse chambers. More configurable and more customizable to your specific needs. These chambers are "built-to-order".