radar 138Pulsed Radar 138 Series 138 K58 for Solids 138 K58 for Solids. The 138 K58 desn is optimized for bulk solid measurements and is used for continuous, non-contact level measurement inPulsed Radar 138 Series 138 K58 for Solids. The 138 K58 desn is optimized for bulk solid measurements and is used for continuous, non-contact level measurement in powdery to