A manual call point is a device which enables personnel to raise an alarm in the event of a fire incident by pressing a frangible element to activate the alarm system.

A control switch that is operated by a person.

A switch which is operated by a person.

A mechanical controller that is intended to position a given item in accordance with a received input signal.

A switchgear and controlgear that houses motor starters to control electric motors.

An operated valve that is opened and closed with a motor.

An analyser giving as output a signal that represents more than one physical properties of the analysed substance.

A flow meter for the metering a mixture of two or more fluid phases.

A valve not designed to regulate flow (e.g. on/off). A valve with multiple orifices or flow-restriction device to control fluid flow. Includes an actuator that needs auxiliary power to operate.

A valve not designed to regulate flow (e.g. on/off). A multi port valve which has the possibility of multiple distinct paths for flow through it. Includes an actuator that needs auxiliary power to operate.

A needle 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 level transmitter that is producing a standardized electrical output signal based on the input signal from a nucleonic level detector.

A circuit-breaker in which the contacts open and close in oil.

A mist detector that is intended to detect oil mist.

An element designed to measure an oxidation reduction potential (ORP).

One-way communications device in which the intended receiver is alerted to receive a message or return a phone call.

An internal combustion engine that is an induction compression ignition exhaust engine which ignites a petrol air mixture with an electric spark.

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).

Physical access control equipment and/or systems intended to regulate or control entry into and/or exit from a controlled area, protected area or a restricted area.

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 heat exchanger using plates as the device for separating the two fluids and across which the energy is transferred.

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