Point-Level Switches for Safety Systems.

The article discusses the importance of having point-level switches in the storage and manufacturing of hazardous materials for the safety of people and environment from chemical spills. Topics include testing point-level switches for possible failure on demand (PFD), placement of the float point-level, ultrasonic point-level and capacitance point-level switches. Also cited are the use of level technologies for prevention of overfill such as ultrasonics, free-space radar or guided radar.