4110--Liquid Nitrogen Precision Freezer Controller System

The Department of Veterans Affairs San Diego Healthcare System is seeking to purchase a Liquid Nitrogen Precision Freezer Controller System. The system must have a user-friendly touchscreen with intuitive interface, full audit trail records, programmable logic controller system, and other specified features. The contractor shall furnish all supplies to VA San Diego Healthcare System, including shipping costs. The key features of the system include: • A user-friendly touchscreen with intuitive interface for simple user interaction • Full audit trail records of all actions undertaken by a signed-in individual, including time and date stamps • Programmable logic controller system to provide enhanced sample security • A hinged lid with locking capability for securing inventory • A stainless-steel tabletop to provide a working surface • A single pivot-point aluminum turntable design with smooth rotation that is ergonomic for easier movement and accessibility • Segmented and labeled turntable for easy inventory storage access and management • Convenient access to measure liquid nitrogen levels • Differential Pressure Sensors to ensure reliability of liquid nitrogen levels • Internal LED lighting and automatic defog function when opened for faster sample visibility • A user management system that allows for the creation of unlimited user profiles with individual permissions • A fold-down full-sized step for securing step when stowed • All stainless-steel construction to provide precise temperature control for liquid nitrogen • Warm gas bypass for stable operation • Battery backup • Ability to store liquid nitrogen in either liquid or vapor phase • Ability to operate at -190°C vapor phase with extended temperature hold • High efficiency with low liquid nitrogen consumption for environmental sustainability