A pressure transmitter where pressure is applied to one side of the sensor while the other side has a vacuum chamber.

A physical object for changing a signal into a corresponding movement.

An electrical connector that is a fixed or free component that permits electrical connection(s) between two or more connectors where direct connection is mechanically impossible.

A propeller like device with agitational or rotational movement located in a tank to prevent the content of the tank to build component segments.

A circuit-breaker in which the contacts open and close in air at atmospheric pressure.

A physical object that is intended to process and annunciate alarms.

An electric generator for the production of alternating current and voltage.

An electric motor driven by alternating electric current.

A physical object for increasing the power of a signal.

Is an artefact intended to retrieve a material at a particular location and inserted into something so as to test its conditions.

A detecting instrument that is intended to analyse a substance for its composition and/or properties.

A detecting instrument for recording wind speed, and possibly wind direction.

An attenuator is a telecommunication device that reduces the amplitude of a signal without appreciably distorting its waveform. Attenuators are usually passive devices. The degree of attenuation may be fixed, continuously adjustable, or incrementally adjustable.

A physical object that is automatic and designed to initiate the operation of circuit-breakers and/or disconnectors in a substation according to a specific programme.

A dynamic compressor in which the gas is accelerated by the action of a bladed rotor and where the main flow is along the rotation axis of the rotor.

A detecting element that is intended to detect axial displacement.

A transmitter measuring an axial displacement and generating a standardized output signal representing the axial measured displacement.

Is a a valve where the flow follows a radial annulus around the axial seat and spring case, passing straight through the valve with very little deviation

Is a gas flow damper intended to adjust an air flow rate through a duct.

A ball valve that is equipped with an actuator that manipulates a stream of fluid in the response to a signal from an external sensing element and with input of energy from an external source.

A direct current power supply unit intended to supply stabilised DC electric power according to specified levels and tolerances.

A direct current power supply unit for charging batteries.

A conveyor that consists of a suitably tensioned endless belt made from hard wearing materials and arranged to run over rollers.

A valve that can be used for rapid depressurizing of a high pressure system.

An artefact which is a stack or an assembly of heavy-duty valves intended to be attached to the top of the casing to control the well pressure.