A circuit-breaker in which the arc develops in a blast of gas.

A control valve that is a gate valve and an actuated valve.

A control valve that is a globe valve and an actuated valve.

A detector capable of detecting both heat and smoke.

An electric cable, that is also an electric heater, with or without a shield or a metallic sheath, intended to give off heat for heating purposes.

An alarm device that makes a loud warning sound.

A meter intended to measure and indicate and/or produce a signal which represents the measured humidity.

A furnace that is intended for the combustion of waste material.

A device which gives a visual indication of a measured value.

Is a communication system.

A physical object that is a closed, rigid box or casing used to enclose and protect the junctions of electric wires or cables.

A reboiler often boils liquid coming from the bottom of a distillation column, after which the resulting vapour is returned to the distillation column.

A physical object intended to produce an optical radiation, usually visible.

A detecting element that is intended to determine a level.

A functional switch that is intended to give an on/off signal when particulate material or fluid level have reached a pre-set value.

A detecting element intended to measure corrosion using electrical conductivity.

An analyser for liquid.

A detector which is capable of detecting selected types of liquids.

A transducer which produces a signal with a defined relationship to the force applied to it.

A physical object that is designed to load or unload products into or from vehicles, wagons or vessels at variable positions.

An electroacoustic transducer that converts an electric signal into sound.

A physical object that is an electric light and its fittings.

A level gauge that use a float containing a magnet to transfer information about its position to a indicator rail with white and red flaps mounted on the outside of the tube.

A level transmitter which uses a floater and magnetic contacts to measure and transmit level.

A manual call point is a device which enables personnel to raise an alarm in the event of a fire incident by pressing a frangible element to activate the alarm system.