The Allihn condenser, also known as the Bulb condenser, is a type of condenser used in laboratory distillation and reflux experiments. It consists of a glass coil surrounded by a jacket through which a cooling fluid is circulated, allowing for efficient heat transfer and condensation of vapor.

The design of the Allihn condenser allows for effective cooling while also providing a large surface area for condensation, making it a commonly used tool in laboratory chemistry experiments.