Precision Cryogenic Dewar — low-loss vessels for exacting cryogenic work
A precision cryogenic Dewar is engineered for minimum heat leak, accurate level indication and repeatable performance. REAL GAZ supplies precision Dewars in stainless steel, with multilayer superinsulation, getter-assisted vacuum and calibrated fill gauges, for nitrogen, argon and helium.
Static evaporation rates are measured and documented so that your calculations rely on real data.
Static evaporation rates are measured and documented so that your calculations rely on real data.
Design follows ISO 21029-1 and EN 13458 concepts; vacuum quality and leak rates are verified using helium mass-spectrometer leak test practice in line with ISO 20485.
🏭 Where Precision Cryogenic Dewars Are Used
- ⚙️ Detector systems — precision Dewars keep sensors at a steady temperature for astronomy and radiation measurement;
- 🔬 Cryostat supply — large-neck Dewars feed research cryostats with steady helium or nitrogen;
- 🏥 Calibration baths — stable cryogenic reference points are maintained for thermometer calibration;
- 🚀 Quantum research — low-vibration, low-loss vessels support experiments sensitive to heat and movement.
💡 Why Choose REAL GAZ
- ✅ Measured performance — static evaporation rate is stated for each Dewar;
- 🧪 Superinsulation — multilayer wrap and getters keep vacuum stable for years;
- 🎯 Accurate level gauging — calibrated gauges give a trustworthy view of remaining liquid;
- 🔒 Documented build — materials, welds and tests are recorded with serial numbers.
- 📄 Certificate of Analysis (CoA) — supplied with every order.
📦 Handling & Storage of Precision Cryogenic Dewars
- Minimise tilting and transport shocks that can disturb superinsulation.
- Cool the Dewar slowly on first fill to avoid thermal stress.
- Log evaporation rates monthly to spot gradual vacuum degradation.
- Request a datasheet that lists neck diameter, heat leak in watts and usable volume, so you can compare vessels objectively.
- Avoid mounting a Dewar near vibration sources, which can disturb sensitive measurements and loosen insulation layers.
- Install a regular level-check routine; calibrated gauges help but a manual dipstick check provides a useful cross-reference.
- Plan a service interval for vacuum re-pumping, since even excellent Dewars lose vacuum quality slowly over many years.
- Ask our engineers to review neck and port geometry against your cryostat drawings before purchase, because small mismatches cause large thermal losses later.
🔬 Quality Control & Safety
- helium mass-spectrometer leak test of the vacuum space;
- static evaporation rate certification;
- weld and surface inspection;
- calibration check of level gauges.
Dewars are shipped under ADR / UN rules with packaging designed to protect vacuum integrity.
⚙️ Trusted Gas Solutions
REAL GAZ offers a precision cryogenic Dewar service for scientific and industrial users in Azerbaijan, Turkey, Georgia, Uzbekistan and the USA. Share your allowable boil-off and neck dimensions, and we will specify the vessel and the cryogen supply.
REAL GAZ — low heat leak, high confidence.