Product Overview
BF‑series ultrasonic fetal doppler is lightweight pocket‑size device for detecting fetal heart rate. Widely used in hospitals, clinics and home prenatal care. Two versions available: BF‑500D+ blue‑screen model and BF‑500D+TFT color TFT‑screen model. Built‑in high‑quality loudspeaker provides clear fetal heartbeat sound, easy for prenatal monitoring.
Main Features
✅ Pocket handheld compact design, easy to carry and operate ✅ Built‑in high‑quality speaker for clear fetal heart sound ✅ 2.0 MHz ultrasound probe ✅ Auto power‑off: automatic shutdown with no signal input for 1 minute ✅ Sound alarm: fetal heart rate over‑range alarm and low‑battery alarm function ✅ BF‑500D+: LCD backlight for night‑time use, backlight switch for power‑saving ✅ BF‑500D+TFT: Color TFT LCD, value / curve display interface switchable; Chinese‑English language switch; 4 counting modes; adjustable upper & lower limit for fetal heart rate; visual & sound alarm for abnormal heart‑rate value ✅ Built‑in rechargeable Ni‑MH battery for long continuous working hours
Technical Parameters
| Item | Specification |
|---|---|
| Model | BF‑500D+ (Blue Screen) / BF‑500D+TFT (Color TFT Screen) |
| Ultrasound Frequency | 2.0 MHz ±10% |
| Output Isotropic Power | ＜35 mW |
| Integrated Sensitivity | ＞90 dB |
| FHR Detection Range | 65 bpm‑210 bpm, tolerance ±2 bpm |
| Spatial Peak‑to‑Peak Sound Pressure | ≤1 MPa |
| Charger Input Voltage | AC 220V±22V, 50Hz |
| Input Power | 20 VA |
| Recharge Battery | Built‑in 8.4V Ni‑MH rechargeable battery pack |
| Continuous Working Time (fully charged) | ≥ 23 hours |
| Working Environment | Temp:+5℃ ~ +40℃; Humidity＜80%; Atmospheric pressure:86‑106 kPa |
| Transport & Storage Environment | Temp:‑10℃ ~ +55℃; Humidity＜80%; Atmospheric pressure:70‑106 kPa |
Version Difference
- BF‑500D+: Blue LCD screen, backlight function, value‑only display
- BF‑500D+TFT: Color TFT screen, heart‑rate curve display, bilingual (CN/EN), 4 counting modes, adjustable FHR upper/lower limit, sound‑light abnormal alarm