A standard and systematic approach to data collection is essential to establishing a repeatable and reproducible condition based monitoring program. VP-12-US standardizes location and method for accessing consistent and quality acoustic data regardless of ultrasound technician experience or enclosure rating. Easily identify potentially hazardous faults such as arcing, tracking and corona in electrical distribution systems and switchgear. Ventilated switchgear ports standardize the measurement point. NEMA rated enclosures require only access through the ultrasound port where technicians can safely collect data on energized equipment in accordance with NFPA 70E safety mandates. The grill allows ultrasound but prevents objects being pushed through the hole into the panel. Polymer IR windows continues with the VP-12-IR.