We use many instruments to perform safety testing on installations. Some of them are commercially available, others have been created and tested by our know-how. In 37 years of activities, observations, practice, we felt the exigence of self-thought and self-made equipment. That way, we can fully answer to verification requests by our customers. In last years we developed new detectors, which we bring on installations to perform detections, and a software with which we acquire and digitally process all collected information. During months preceding the beginning of the inspections, we are devoted to fine-tuning this equipment and from time to time we add some improvements.