Designed to cool the vapors from a liquid sample that is being heated (distilled), and capture the condensation. The clear plastic top of the Condenser has a small opening in the center to hold a temperature sensor or other temperature sensing device. The hole can be plugged with a small rubber stopper (included) The bottom reservoir of the Condenser has a mark to indicate that the volume of condensate has reached 10 milliliters (mL). The bottom also has a spout to use when pouring the collected liquid out of the Condenser. The PS-3402 Condenser can be mounted on a support rod up to 12.5 millimeters (mm) in diameter.