The cost of a total installed control loop (instrument loop) depends on:

• selection of instruments and material;
• infra structure and signaltransfer (convetional cables, fieldbus, radio- or phone connection);
• complexity of the control action (e.g direct reading, alarm, feed forward control);
• safety classification (SIL, ATEX, PED).

Including:

• instruments (e.g. sensors, signal transmitter, control valves, valves);
• all required material for connecting to process and instrument air;
• cables, cabletrays and additional material;
• hardware and software for process control system;
• calibrating, testing and put into operation;
• installation- and program costs.

Variation

If installing during operational production the costs will increase 15 - 20%.