The external fabric of a building that is visible above ground.

Equipment used to direct surface water flow.

A physical object that is protecting against a large but momentary increase in the voltage of an electric circuit.

A check valve that is a check valve where the closure member is a disc which swings freely on a hinge and which opens automatically when flow is established and closes automatically when flow ceases or is reversed.

A switchgear and controlgear bearing a set of switches for connecting and disconnecting the various circuits of an electrical system, as of a telegraph, telephone, etc.

A physical object that is a general term covering switching devices and their combination with associated control, measuring, protective and regulating equipment, also assemblies of such devices and equipment with associated interconnections, accessories, enclosures and supporting structures.

An artefact joining two parts so that one or both can pivot freely (as on a bolt or pin).

An instrument panel dedicated to a particular system.

A vessel intended to contain fluid for storage. Typically a receiving or collecting function for further distribution. Typically with a vertical and cylindrical or square shape and a flat or conical bottom.

A fluid regulator that controls the flow of liquid or gas from a pipe or container. Taps are often attached to a sink or bath.

A device that transfer data between a computer and a magnetic tape.

In a communications network, a network node equipped for interfacing with another network that uses different protocols.

A physical object that converts sound signals into corresponding variations of electric current (or potential), which is transmitted by wire or radio to a distant point where it is reconverted into sound.

A detector intended to detect temperature.

A detecting element intended to sense temperature.

A gauge that is intended to measure and indicate a temperature.

A physical object that detects temperatures; records, modifies and/or displays or performs a combination of these activities.

A regulator that is intended to keep a temperature within certain boundaries.

A functional switch that is intended to give an on or off signal when the temperature have reached a pre-set value.

A transmitter that is producing a standardized output signal dependent of a received input signal from a temperature element.

An 'artefact' intended for the termination of cables.

An analysing instrument that is intended to determine a physical property that is named thermal conductivity.

An element which uses the principle of thermal conductivity to measure volume flow rate.

A velocity flow meter which uses the principle of thermal conductivity to measure volume flow rate.

A pair of electrical conductors of dissimilar materials, joined at one end (the measuring or hot junction), which produces an electromotive force (e.m.f.) due to the Seebeck effect in a circuit formed by connecting the other ends of the dissimilar materials used (the reference or cold junction) to a device for measuring e.m.f. Def. acc. to IEC 902 1987.