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.

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 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.

Is a solid state device that converts heat flux (temperature differences) directly into electrical energy

A pilot switch whose function is controlled by variations of temperature and whose contacts make or break automatically a load circuit when the temperature of the ambient space in which its sensing element placed or the temperature of the surface on which it is fixed reaches a predetermined value.

A timepiece that measures a time interval and signals its end; a time-switch.

A transformer that, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current usually of different values and at the same frequency for the purpose of transmitting electrical power.

A pilot switch intended to create a switch action at a pre-set value.

A physical object that is intended to rotate within a fluid and to transform energy within a fluid into mechanical power.

A transmitter specially designed to convert the signal in a turbine meter into a standardized output signal.

A flow transmitter providing electrical outputs that are proportional to the flow inputs from an ultrasonic flow meter.

An element intended to determine a level based on ultrasonic sound waves.

A level transmitter that is using ultrasonic sound to continuously monitor the level of a liquid or particulate matter in a tank or vessel.

An ac power supply unit that maintains a continuous supply of electric power to the equipment it protects.

A circuit-breaker in which the contacts open and close within a highly evacuated envelope.