Most moisture analyzers use chemicals or high temperatures, but not 4TE DUO. Instead, an infrared beam focused on a tiny mirror determines the precise water activity of the sample. That water activity reading is then translated into moisture content, based on a product-specific calibration model.
Videos:
https://youtu.be/SQzsQR4kBwQ
Specifications
Water Activity: ±0.0001aw; Balance: N.A
activity, moisture content, temperature, time,
date, operator, &sensor used)
9600 baud, no parity, 1 stop bit,
cable inlcuded
measurement of water activity