Rated for use in hazardous environments, the Mark 4 Yo-Yo inventory management system from Bindicator
, Spartanburg, SC, combines a sensor, RS-485 Modbus communications, and optional i-LEVEL vendor management software. The sensor provides a 4–20 mA output with adjustable span and can measure level in silos up to 100 ft. with resolution of 0.39 in. Using the remote display, you can remotely set up, configure, and request/display measurements from up to 99 Mark 4 sensors. Web-based i-LEVEL software makes inventory levels available worldwide via an intranet and/or internet environment.