A flow transmitter providing an output signal that is proportional to the flow inputs from a differential pressure flow meter.

A gauge that is intended for measuring and indicating pressure differences.

A level transmitter that is measuring liquid level by sensing pressure difference between two points, e.g. the hydrostatic pressure at the bottom of a tank to the atmosphere pressure.

A pilot switch intended to switch or give an on/off signal when the measured differential pressure has reached a pre-set value.

A pressure transmitter that is producing a standardized output signal dependent of a received pressure difference signal.

A physical object that contains a diverging channel-shaped chamber in which part of the kinetic energy of the fluid is converted into pressure energy.

A heat exchanger that allows contact between the hot and cold fluids.

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

An electric motor for operation by direct current.

A level transmitter which uses a displacer as sensing element.

An analyser intended to determine the relation between the boiling temperatures and the fraction distilled. It includes the initial boiling point and the final boiling point.

A process column intended to enable a distillation process.

A switchgear and controlgear that is an insulated panel carrying terminals, fuses, etc, for controlling a number of subsidiary electrical circuits.

A 'device' that is providing diversion of something from an expected course or direction.

A device used to translate print media into computer language so that a document can be viewed and read later on.

A physical object that is an opening in a barrier and a removable physical object that can block the opening.

A block and bleed valve that is incorporating two seats, each of which provides a seal, and a means of venting the space between the seats. The seats may isolate with the pressure differential acting in the same or in opposite directions depending on the design.

A heat exchanger that consists of two co-axial pipes of different sizes, where one fluid passes though the  inner pipe and the other fluid passes through the space between the inner and the outer pipes.

A valve that is intended for subsurface control/check operation.

A drain port is a collection port that can be installed in pressure sensing lines for transmitters, steam lines, etc. to be able to remove liquids from the system that otherwise would create problems for the instruments.

A 'liquid outlet port' that allows liquid to leave a container under gravity

A drier is a physical object that is intended to remove absorbed or adsorbed liquid or water vapour below saturation state.

Equipment intended to enable the drilling of holes. Typically in the earth for oil and/or gas production.

An artefact which is intended to operate and supply power to an artefact (instrument) with an edged or pointed end for making holes in hard substances by revolving or by a succession of blows.

A rigid metal conduit that provides the high-pressure pathway for drilling mud to travel approximately one-third of the way up the derrick, where it connects to a flexible high-pressure hose (kelly hose).