Technical Dewar Flasks for laboratories — precise cold handling for bench and cleanroom work
REAL GAZ provides technical Dewar flasks for laboratories that are compact, easy to clean and suited to everyday cryogenic tasks at the bench.
Choose from low-form flasks for dipping and cold traps to tall flasks for storage and transport between rooms.
Choose from low-form flasks for dipping and cold traps to tall flasks for storage and transport between rooms.
Products relate to EN 13458, ISO 21029-1 and BS EN 12021 style purity practice, supporting teaching, research and testing laboratories.
Laboratory managers often ask which flask suits which job. For a cold trap, a wide-mouth flask of 1 to 2 litres is practical because the trap sits inside it. For transport from the storage room, a lidded 5 or 10 litre flask with a handle is safer. For microscopy, a narrow flask with a long neck limits splashing. REAL GAZ lists these differences in plain language, and our team can arrange a short briefing for new staff, covering protective equipment such as face shields, cryogenic gloves and closed shoes. Cleanroom users may prefer flasks with smooth, crevice-free exteriors that can be wiped with approved disinfectants. Mention your cleaning agents when you order and we will check that they suit the vessel finish.
🏭 Where Laboratory Dewar Flasks Are Used
- 🧪 Cold traps — a wide-mouth flask surrounds a vacuum trap, condensing solvents before they reach the pump;
- 🔬 Electron microscopy — specimen holders are cooled with liquid nitrogen from a small flask held beside the instrument;
- 📚 Teaching demonstrations — lecturers show the behaviour of materials at low temperature in controlled classroom experiments;
- ⚗️ Chemistry — reactions at minus 78 °C or lower are held with a bath prepared in a flask.
🧤 Good Laboratory Practice
- always pour slowly to avoid thermal shock to glassware and splashing;
- never seal a flask with a tight stopper, because evaporating liquid creates pressure;
- keep an oxygen monitor in rooms where large volumes of liquid nitrogen are stored.
💡 Why Choose REAL GAZ
- ✅ Appropriate sizes — small volumes reduce waste and limit risk in teaching rooms;
- 🧪 Clean construction — smooth surfaces simplify wiping down between experiments;
- 🎯 Matched liquid — we deliver analysed liquid nitrogen in grades suited to analytical work;
- 🔒 Training notes — a concise safety sheet explains handling, venting and first aid;
- 📄 Certificate of Analysis (CoA) — supplied with every order.
🔬 Quality Control & Safety
- multi-stage inspection of every vessel before filling;
- vacuum and insulation performance checks;
- moisture & impurity analysis of the filled liquid;
- leak testing and pressure integrity checks.
Deliveries respect ADR / UN rules and relevant EN/ISO standards for cryogenic liquids.
⚙️ Trusted Gas Solutions
Universities, hospitals and testing houses in Azerbaijan, Turkey, Georgia, Uzbekistan and the USA select REAL GAZ for technical Dewar flasks for laboratories because we answer both the equipment question and the liquid supply question. Ask our team about quantities, delivery rhythm and accessories.
REAL GAZ — clear guidance for cold science.