01 Use

It is used for routine monitoring of fetal heart rate by gynecologists, obstetricians, and midwives. It is a high-sensitivity, ultrasound fetal heart rate detector with FHR reading capability. It can be used from the 10th week of pregnancy.


New feature: ability to set and save the detector’s volume level.

New probe: double the sensitivity.

02 Features

  • BP2MHz probe – narrow-angle, general-purpose
  • High sensitivity, from the 10th week of pregnancy
  • Low noise level
  • Clear sound
  • Manual and automatic volume adjustment
  • Interference rejection module
  • FHR measurement range: 50-210 bpm
  • Automatic and manual heart rate measurement
  • Headphone output (optional)
  • Battery or rechargeable battery power supply, 2xAA/R6 with power-saving feature
  • Automatic shutdown
  • Long battery/rechargeable battery life, approximately 30 hours
  • Battery/rechargeable battery status indication

03 About the product

Doptone UDT-20D

Power supply: Battery powered with 2×1.5V AA/R6 batteries

Doptone UDT-20D-R

Power supply: Rechargeable with NiMH batteries, 2×1.2V AA/R6

Included with the device: Ultrasound gel, carrying bag, batteries or rechargeable batteries with a fast charger (5 hours).

Upon request: Headphone output and headphones.

04 Downloadable

Catalog sheet