An analysing instrument intended to measure, indicate and/or produce a signal which represents the measured alkalinity / acidity in a fluid or matter.

an element designed to measure pH (potential of Hydrogen).

A detector that is intended to detect a pig inside the pipeline or pig receiver.

A transmitter intended to detect a pig passage and transmit a signal representing the measured value.

A differential pressure flow meter utilizing a pitot tube (a probe with an open tip) that is inserted into the flow field.

A control valve that is also a plug valve and an actuated valve.

An actuator that is intended to be operated by pneumatic power.

A mechanical controller that is using pneumatic components to execute its function.

A pilot switch the actuating system of which is operated by a moving part of a machine, when this part reaches a predetermined position.

A transmitter that is producing a standardized output signal dependent of a received input signal from a position detector.

Elements like impellers rotating by the pressure of the fluid in a closed conduit to measure the flow of a liquid.

A flow transmitter specially designed to convert the signal from a positive displacement flow meter into a standardized electrical output signal.

An analysing instrument intended to determine the pour point of a fluid, i.e. the lowest temperature at which an oil or other liquid will pour under given conditions.

a device that removes voltage spikes from an AC or DC electrical supply.

A physical object intended to supply electric power according to specified levels and tolerances.

A detecting element intended to sense pressure.

A gauge intended to measure and display a representation of a measured pressure.

A regulator that is controlling/regulating the pressure in a system.

A functional switch that (usually) turns an electrical circuit on or off when the pressure level reaches a pre-set value.

A signal converter that is intended to convert a pressure input signal to DC output signal.

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

is a facilty for measure & control, including the main plant computerized operational system, where all process, utility and off site activities are monitored. The system may be located in the main control room. (e.g. PLC Programmable logic controller, DCS distributed control system, ENMC Electrical Network Monitoring and Control system).

A measuring relay that, either solely or in combination with other relays, is a constituent of a protection equipment.

A detecting element that is intended to sense proximity.

is an alarm system.