SonoTrax II

Ultrasonic Pocket Doppler SonoTrax II Series can meet the routine examination requirements of obstetricians, midwives and pregnant woman themselves. SonoTrax II is a high performance model with FHR digital LCD display with backlight. SonoTrax II Pro has audio playback. All these models have audio output, which can be connected with earphone or recorder. As well, you can operate the unit with 4MHz or 8MHz probe for vascular diagnose.


  • Ergonomic design, compact and light
  • Easy-to-use
  • Large backlight LCD display
  • Accurate FHR detection with clear sound
  • High sensitivity interchangeable probe
  • Support 2MHZ,3MHZ,4MHZ,8MHZ waterproof probes
  • Automatic and manual FHR Counting
  • Long time continuous use(about 8h)
  • Automatic power-off
  • Build-in rechargeable poly-lithium battery and AC recharger
ModelInterchangeable probesFHR displayBuilt-in audio recorderBacklightWater proof probeprobe Auto-detection displayBattery status displayLow battery indication
OptionEarphone, Carry Bag, 4Mhz probe and 8Mhz probe for extracranial and peripheral blood vessel examinations
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