Condenser (heat transfer), a device or unit used to condense vapor into liquid. More specific articles on some types include:
Condenser (laboratory), a range of laboratory glassware used to remove heat from fluids.
Surface condenser, a heat exchanger installed in steam-electric power stations to condense turbine exhaust steam into water.
Air coil used in HVAC refrigeration systems.
Condenser (optics), in classical optics for the visible spectrum, a mirror, lens, or combination of mirrors and lenses used for the purpose of gathering visible light and directing it onto some object or through a projection lens, such as in Köhler illumination, telescope, projector, or enlarger
Condenser (microscope), a group of lenses mounted below the stage of an optical microscope to concentrate light.
Capacitor, formerly called a condenser, an electrical device that can store energy.
Condenser microphone, a device that converts sound waves into an electrical signal.
Steam locomotive condensing apparatus, a condenser fitted to steam locomotives for use in tunnels and to increase range.
Synchronous condenser, a rotating machine similar to a motor, used to control AC power flow in electric power transmission.