ConvSpec is a near-infrared spectrometer measuring 4.8 × 6.2 × 0.6 cm, weighing 16.5 g, and costing an estimated $10 in components.
2
The device covers wavelengths from about 1,200 to 1,700 nm and collects and processes each spectrum in less than 0.4 seconds.
3
In internal tests, machine learning models correctly classified samples of plastics, pharmaceuticals, coffee, flour, and tea.
4
In solution experiments, ConvSpec measured ethanol, lactate, glucose, and ethylene glycol concentrations from 0.1% to 40%, with mean absolute errors of 0.006% to 0.017%.
5
Exploratory wrist-probe testing found that glucose models could not reliably predict levels in new participants, and the study did not establish ConvSpec as a clinical diagnostic test.
