Tramex Moisture Meter Plus. No, I did not use the penetration. Yes, the stucco was excellent. The readings were all over the house except for the kitchen area which was recently redone and did not have the stucco finish. The readings were well into the red zone and the alarm sounded. The A/C was working properly. The humidity was high on the outside but did not seem to be on the inside. No pictures except for inside closets where there were several small holes and which was drywall and tested normally.