I turn up most days in a coal/oil fored power station, I maintain the instruments and controls. I served my time as they say as an instrument mechanic ( everybody thought it was musical instruments) In those days it was all pneumatic now it mostly electronic with just a big ram at the end. last few years I have been maintaining pollution monitoring equipment, the analysers for the gas that goes up our stack, Sox Nox Co O2. Im getting more into the enviromental stuff .