High speed and high resolution. Breakthrough ADC technology switches from 8 to 16 bits in the same oscilloscope.
Figures 4 and 5 below shows traces that were obtained using the pulse plethysmograph.
As described in the experiment, using these traces it is possible to calculate the beat–by–beat (instantaneous) heart rate.
Ages 7–18 (Key Stage levels 2 and 5)
In this activity the pulse rate is measured via an infrared led and phototransistor detecting, by the absorption/reflection of the IR radiation, the change of blood volume in the tissues produced following each heart beat. Whilst relating directly to KS2 Sc2 Life processes and living things, Humans and other animals, Circulation 2c/d, it would also be of interest to those studying the many medical physics and electronic instrumentation modules at AS/A/AVCE levels. Whilst at KS2 one would not expect the pupils to calculate the pulse rate from the Pico screen display, their seeing the effect on the pulse display of a higher/lower pulse rate would be useful.