It is an electrode on a transistor from which a flow of electrons or holes enters the region between the electrodes.

The semiconductor material in a transistor that emits carriers into the base region when the emitter-base junction is forward biased.

the electrode in a transistor where electrons originate

one of the three leads of a bipolar transistor.

A device used on fibre optic networks. Using an LED or laser, it emits pulses of light onto a fibre optic cable.

a light-emitting diode (LED) or a laser which transmits an optical pulse along the fibre

1. The sensor containing the source of sensing energy in opposed-mode sensing. 2. The emitting device within any sensor (e.g. LED, laser diode, ultrasonic transducer, etc.).

A component of a safety light curtain that consists of a row of synchronized / modulated light emitting diodes. The emitter, together with the receiver that is placed opposite, creates a curtain of light called the protective field.

a device used in drip irrigation to transfer water from a pipe or tube to the area to be irrigated

a delivery device used in trickle (drip) irrigation to reduce the water pressure within the lateral line to nil before discharging the water to the soil.

a device that regulates the flow of water at a slow rate in drip irrigation systems

These are the devices which allow the water to drip slowly from the supply tube to the point of irrigation. Also called drippers. See NPC and PC.

Panel that broadcasts description audio (and, in some cases, amplified main audio for hard-of-hearing people) via infrared light waves.

See infrared emitter.

(also infrared emitter, infrared blaster): Generates infrared pulses that control consumer electronic hardware (most remotes have one).

Term used in active stereoscopic systems to refer to the small infra-red that transmits an infrared signal to wireless shutter glasses in order to synchronise them with the alternating left and right stereoscopic images on the screen.