ColdStash 47-11 Dewar – Long-Term Cryostorage for Embryology and IVF Laboratories

 

Overview

The ColdStash 47-11 Dewar is a premium liquid-nitrogen storage vessel designed for IVF and reproductive-medicine laboratories that require stable, long-term cryopreservation. With a 47.4 L capacity, low static evaporation rate (0.39 L/day), and 76-day holding time, it provides exceptional temperature stability and nitrogen efficiency for embryos, oocytes, and sperm samples.

Lightweight yet durable, the 47-11 combines aluminum construction, advanced vacuum insulation, and a reinforced neck tube to maintain cryogenic integrity while reducing operating costs.

 

Technical Specifications

Specification	Details
Liquid Nitrogen Capacity	47.4 litres
Static Evaporation Rate	0.39 L/day
Working Duration	76 days
Canister Configuration	6 canisters
Canister Height	11 in (279 mm)
Canister Diameter	4 in (102 mm)
Neck Opening	5 in (127 mm)
Weight (Empty / Full)	19 kg / 54.6 kg
Outer Diameter	508 mm
Overall Height	673 mm
Material	High-strength aluminium
Sample Capacity	Up to 1,620 vitrification straws (10 per cane)
Warranty	2 years and 5 years on vacuum

Applications in Reproductive Medicine

Embryo and Oocyte Preservation – Maintains viability through stable sub-196 °C storage.

Sperm Cryostorage – Ideal for donor or patient samples with minimal nitrogen loss.

Embryology Research – Reliable long-term cryogenic stability for study materials.

Fertility Clinic Operations – Compatible with most industry-standard racks and canisters used in IVF storage systems.

Design and Performance Highlights

Vacuum-Insulated Chamber: Advanced chemical vacuum retention minimizes heat transfer.

Reinforced Neck Tube: Enhances durability and reduces LN₂ evaporation.

Spider Platform Design: Simplifies canister access and reduces handling time.

Tamper-Proof Lid: Protects sensitive reproductive samples.

Optimised Efficiency: Reduces LN₂ consumption by up to 30% compared with generic models.

Best Practices & Safety

Safe Handling

Always wear cryogenic gloves, face shield, and lab coat.

Never seal the vessel airtight—allow venting to prevent pressure buildup.

Maintain good room ventilation to prevent oxygen depletion.

Maintenance Schedule

Inspect cork and neck seals monthly.

Measure nitrogen levels weekly and refill before reaching 50% capacity.

Empty and warm annually for interior inspection.

Replace damaged canisters or corks immediately to prevent contamination.

FAQs

How long can samples remain stored?
Indefinitely, provided LN₂ levels stay above the sample height.

How often should the 47-11 be refilled?
Evaporation rate should be checked at least weekly and routinely filled.

• Replacement canisters
• Canes
• Goblets
• Sleeves
• Metal Tags
• Cryo cassettes