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A new version of SALS (Submersible Audible Light Sensor) consists of a wireless light-detecting probe, Bluetooth ® connected to the iOS SALS App. As in previous versions of SALS, changes in detected light are converted to changes in sound, the latter now rendered with iPhone or iPad audio. The SALS probe assists the student with visual impairment in a variety of science activities, including those involving liquids. For example, when the SALS probe is placed in a reaction vessel, changes in light intensity caused by a chemical reaction or color indicator change are converted to changes in tone in real time. The SALS app also provides options to store tones from experiments and the conversion of tones to Hertz for quantitative expression of data.
"The SALS App: Making Chemistry Accessible With iOS Devices,"
Journal of Science Education for Students with Disabilities: Vol. 22
Available at: https://scholarworks.rit.edu/jsesd/vol22/iss1/4