CelsiStrip self-adhesive labels, which can be easily applied to any cleaned surface, permanently change their temperature-indicating areas from white to black whenever specified levels are reached or exceeded. CelsiStrips are available in various configuratons of 40 sequenced temperature levels from 40 to 105F and up to 550F. Applications range from control of storage temperatures to monitoring minimum and maximum temperature levels of thermal processes. SAT Spirig Advanced Technologies Inc., 144 Oakland St., Springfield, MA 01108, www.celsi.com