Unit is a Neslab CC-100 Cryocool immersion cooler.
Specifications:
-Temperature Range: -25*C to -90*C
-Temperature Stability: +/- 0.5*C
-22700101

Manufactures description
The CryoCool Series of immersion coolers is designed as a refrigeration
source for sub-ambient work in liquid baths.
CryoCools employ mechanical refrigeration systems constructed with fullhermetic
refrigeration compressors. The CC-100 has a dual stage
refrigeration system using two compressors in cascade configuration. An
insulated coaxial hose assembly carries refrigerant to the cooling probe.