well Dav, there are all sorts of sound meter's out that can measure ambient noise levels in a broad area but as for measuring a noise level on a component on a lift or any other type of equipment i cannot find any electronic device that will do this. There are tool trucks like MAC and SnapOn that sell stethoscopes that can allow you to put the probe on a component and hear the noise it makes but as for measuring its sound level? It does not have an electrical interface, its just like a doctors stethoscope you wear on your head.
I'll keep searching but i doubt you will find anything like what you are describing.
The only way you might get even close to measuring the sound level a component puts out is to put the sound measuring device next to it and see what it measures, it should measure higher near the component and give you a rough estimate of the sound it is emitting.

just a thought