Lurex 3000mL Boiling-Reaction Flask with Integrated Thermowell (29/42 ST Joint)

This 3000 mL Lurex flask is a specialty piece of vintage or custom laboratory equipment that is classified as a round-bottom boiling/reaction flask with an integrated thermowell and features a precision-ground, standard taper 29/42 outer joint. Unlike a standard multi-neck flask, this specialized configuration is designed to allow safe, continuous internal temperature monitoring of a chemical mixture without breaching a vacuum seal or exposing a sensitive thermometer probe directly to corrosive reagents.

The round-bottom shape ensures uniform heat distribution across the surface area, making it ideal for boiling, refluxing, or high-temperature distillation. The angled side neck is not open to the atmosphere. Instead, it transitions into a sealed, closed-bottom glass sleeve (the thermowell) that extends deep into the lower quadrant of the main bulb, which forms an absolute physical barrier. Liquids and vapors inside the flask stay entirely separated from anything placed inside the tube. Heat from the surrounding liquid mixture transfers through the thin, uniform borosilicate glass wall of the sleeve, giving the operator an exact, real-time temperature reading of the reaction zone. Ideal for vacuum distillations and corrosive or high-purity reactions.

Cork ring stand is NOT included.