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It is a Antepartum Fetal Monitor measuring FHR and UC. It enables a woman in childbed to indicate
fetal movement point by pushing event marker button by herself when she feels that.
BT-300 indicates FHR as numeral by irradiating ultrasound at the abdomen, abstracting doppler
frequency of heart beat cycle from the signals reflected from fetal heart, outputting FHR change as a
sound, and analyzing these signals. Besides, you can measure UC by using pressure sensor, indicate,
and print the data of FHR and UC.