Lab grade dewars

Pope Lab Grade Dewars are rated the most efficient glass dewars in the world. Designed for use with liquid nitrogen, this superior ranking is due to rigid quality controls in manufacture and a number of outstanding design and manufacturing features.

• Efficiency assured by rigid bakeout and evacuation control (evacuated to 10^-5 torr or better).
• Evacuation tip completely shielded for increased protection.
• Weighted bases on all models for stability.
• Optional full length metal housing on most models for added protection.
• No pads between walls on cylindrical dewars eliminating this heat transfer potential.
• Supplied polyethylene stopper tops off dewars to minimize evaporation.
• Holding time 2–6 hours depending on volume.

The protective aluminum bases on both styles extend the full height of the dewars. Note that protected vacuum tip-off tubulations are offset to the side to minimize space between the dewar bottoms and magnetic stirrers.

Standard Base

Standard Wide Mouth Cylindrical Dewars
These Dewars exemplify the emphasis placed on both efficiency and safety by Pope Scientific. All Pope Lab Grade Dewars are manufactured of borosilicate glass for liquid nitrogen service. A sturdy mesh cover facilitates a firm grip, provides a cushion against bumping and increases protection. Holding time 2–6 hours depending on volume.

Full Base

Full Length Aluminum Housing Cylindrical Dewars
All Wide Mouth models can be obtained with an exterior metal housing that extends nearly to the top rim of the Dewar (a slight extension of the glass dewar facilitates pouring). This housing adds the safety of metal to the efficiency of glass, particularly important in handling operations. Holding time 2–6 hours depending on volume.