Scientific Technologies, Inc.'s Automation Products Group introduces its VBL Series Vibrating Level Sensors. Featuring a patented principle and probe construction, the VBL series is designed for use in medium or large sized hoppers, with multiple versions available to satisfy a variety of application requirements. The Model VBL-12 is a compact version used for high and low level detection. The VBL-12 is available with a protective shield for low-level detection in large silos. It features side and top mounting capability. The top-mounting Model VBL-22 is suitable for high alarm operation in large silos. Extension tubes up to eight feet (2,500 mm) and 13 feet (4,000 mm) are available. Model VBL-32 is an extension cable, top-mounting version. It is suitable for high alarm operation and includes a flexible PVC coated cable available in lengths up to 20 feet (6,000 mm).