This company now offers protective light curtains for its tumble blenders (photo) to provide automatic safety shutoff whenever an operator crosses a defined security boundary. Due to the nature of the rotating mix chamber, a safety railing is supplied as standard on these blenders, and the addition of optional light curtains further improves operator safety. The blenders are also equipped with an explosion-proof brake motor, a 50-psig heating and cooling jacket and a NEMA-rated control panel with a purge system suited for Class 1, Div. 1 hazardous locations. Standard blender models are rated for bulk densities up to 125 lb/ft 3, and specialty designs are available for higher densities. These blenders are designed for batch operations that require the dispersion of extremely small components and low-shear intensity. — Charles Ross & Son Co., Hauppauge, N.Y.