The LM2D released by K-Tek Corp. is a 2-D laser scanner for noncontact volume flow measurement of materials on a conveyor belt. Its noncontact belt speed sensor uses Doppler radar to measure conveyor speed, the scanner head scans the profile of the flowing material, and an onboard microprocessor uses that information to calculate volume and mass throughput in real time. Measurement range is from 1.0 to 2.5 m, viewing angle is ±60°, and resolution is 1%. The plug-and-play device takes only minutes to install and requires no calibration or routine maintenance. Data can be sent to other devices via the RS-232 interface, and no special software is required.