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Originally Posted by Graham
In industry, flowmeters of this type are commonly used - these units are in the $6000 range, so they don't throw them away - They do maintain them by removing on a regular basis, cleaning and recalibrating. This is what led me to try cleaning. Some type of ultrasonic cleaning may be what is really needed. Presumably Bosch have a method?
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The key is the value/cost. I would imagine part of that cost is the designed capability to service. The concept of "recalibrating" undoubtably plays a large part. In this system the system calibrates (adapts) to the change in the part. it has limits. If the device were to recalibrate itself more would be capable.
It is conceivable that you are improving (cleaning the surface). With the numbers we could tell. Spread over 70k or more whether servicing the device for minimal extention of life is a completely economic equation. Three months extention might be justafiable with your own labor. If done professionally I'm guessing that with proper evaluation and adaption resetting the cost would be a significant portion of a real solution. That is the economic equation.