I would like to measure air quality coming from compressed air that used for CNC machine.
I am wondering if there is any hand held device to measure and check if it is compliant with ISO 8573.1 Class 1.4.1.
I dont have the answer to this question, but if your air compressor is not an oil free machine, it is unlikely your product air to CNC machines meets the residual oil requirements for class 1.4.1. And so too for your water dewpoint of 37degF at operating pressure.