3     Components and devices

3.1     Sensors

3.2     Actuators

3.3     Valves

3.4     Dampers

3.5     Motors

3.6     Pumps and fans

3.7     Control panels and motor control centres

3.8     The intelligent outstation

3.9     Summary

This section deals with the hardware components that make up a control system. Guidance is given on the choice of suitable sensors and the importance of correct installation is stressed. Valve sizing and characterisation is covered together with choice of dampers. The use of variable-speed drives for pumps and fans is covered.

3.1        Sensors

Sensors form a vital component of any control system. Sophistication in the computing and software functions cannot compensate for inaccurate information provided by poor-quality ...

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