Sensing Remote -- See Remote sensing Here are entered works on the theory or methodology of collecting and gathering images of distant objects or property. Works on handling, maintaining, and indexing remote-sensing images in unbound collections are entered under Remote-sensing images. --subdivision Remote sensing under topical headings
Sensors Chemical -- See Chemical detectors Here are entered works on apparatus used to detect the presence or absence of chemicals on a relatively gross scale in industrial processes, environmental protection, etc.
