In this paper the construction of hypertext which simulates a virtual laboratory (Non-Destructive Laboratory) will be described. The hypertext was applied to on-line experiments associated to the study of industrial automation processes, e.g., the monitoring of temperature, pressure and flow sensors. A test platform and an HMI (Human Machine Interface), developed in the software LabVIEW, were used. The HMI is published in the Web Server while the experiment is being executed. Thus, the students can assume a hybrid role in the learning process, not only acquiring new knowledge in the study area, but also producing it by means of this hypertext.