Product Overview
Used Ortec 31L Liquid Nitrogen Dewar – Setup for Germanium Detector
This Ortec 31-liter liquid nitrogen Dewar is configured for use with high-purity germanium (HPGe) radiation detectors. Designed to provide stable cryogenic cooling, it supports extended operation of gamma spectroscopy systems that require precise temperature control for energy resolution and sensitivity.
Ortec has long been a trusted name in nuclear instrumentation. This Dewar’s design reflects their focus on reliability—built from vacuum-insulated aluminum to minimize nitrogen loss and maintain consistent cooling performance in laboratory and field environments.
Product Condition
Used, in functional condition. Setup for use with a germanium detector. The silicone rubber at the mouth shows age-related wear and may need replacement for an optimal seal. Exterior shows normal wear with surface marks and scuffs from prior use. We were not the prior user of this unit.
Product Overview
The Ortec 31L Dewar is a standard cryogenic vessel used in conjunction with HPGe detectors for gamma spectroscopy. Its 31-liter capacity provides extended operating time between refills, ensuring stable detector cooling for long-duration experiments. The rugged design and compatibility with Ortec detector hardware make it a dependable component for radiation measurement systems.
Key Features
- Brand: Ortec
- Capacity: 31 liters liquid nitrogen
- Configured for HPGe germanium detector use
- Vacuum-insulated aluminum body for long nitrogen retention
- Silicone rubber mouth seal—shows age wear, may need replacement
- Vertical orientation for laboratory or field use
- Durable construction with carry handle and stable base
- Extended hold time for uninterrupted detector operation
- Compatible with standard Ortec detector hardware
Applications
- High-purity germanium detector cooling
- Gamma spectroscopy and nuclear analysis
- Laboratory and field radiation measurement setups
- Cryogenic support for nuclear instrumentation
- HPGe detector calibration or maintenance
- Replacement or spare Dewar in spectroscopy systems
- Cryogenic training and educational demonstrations
Frequently Asked Questions
Is this Dewar ready for detector use?
Yes. It is set up for use with a germanium (HPGe) detector and features a standard Ortec-style connection interface.
What maintenance might be required?
The silicone rubber at the mouth shows aging and should be replaced to ensure a tight cryogenic seal. Exterior marks are cosmetic and typical for a used Dewar.
What is the capacity and hold time?
The Dewar holds approximately 31 liters of liquid nitrogen, providing long intervals between refills depending on detector heat load and ambient conditions.
Is the Dewar vacuum-sealed?
Yes, it is vacuum-insulated. The unit appears structurally sound, though vacuum integrity has not been independently tested.
Can it be used for other cryogenic applications?
Yes. While optimized for HPGe detector use, it can be used in other laboratory settings requiring liquid nitrogen cooling or storage.
Made for precision gamma spectroscopy, this Ortec Dewar still carries the cold reliability of its lab heritage—its next chapter awaits your detector.
