reactor controlled lab reactor controlled laboratory reactor CLR 2023-03-24 Moved to AFO. [Allotrope] In chemistry, a Controlled Lab Reactor or CLR is any reaction system where there is an element of automated control. Generally these devices refers to a jacketed glass vessel where a circulating chiller unit pumps a thermal control fluid through the jacket to accurately control the temperature of the vessel contents. Additional to this, it is common to have a series of sensors (temperature, pH, pressure) measuring and recording parameters about the reactor contents. It is additionally possible to control pumps to act on the reactor. [Wikipedia] controlled lab reactor A controlled lab reactor is a reactor that maintains temperature and other reaction parameters and has measuring devices. [Allotrope]