Fetal Doppler

Main Technology Specifications
Working Frequency :2.0 MHZ + 10%
Ultrasonic output Power : lob<10 mW/cm2
Overall Sensitivity : > 90 dB (integrated sensitivity 200mm away
from the surface of the probe)
While measuring integrated sensitivity using the doppler frequency
(300 + 50) Hz
Reflecting target speed: 10cm / s — 40 cm / s
FHR measuring range : No narrower than 50bpm-240bpm (+ bpm).
(Beat Per Minute)
FHR accuracy:+ 2 bpm
Spatial-peak temp-peakacoustic pressure:< 0.1 MPa.
Negative Peak Sound Pressure: (p_) <1 Mpa
ob 2 Output Beam Intensity: (I )<20mW/cm
2 Spatial-peak Temporal-average Derived Intensity:(I )<100mW/cm spta
Continous Working Time:>5h (Low battery capacity or large
volume may reduce working hours)
6 2 Coupling gel acoustic impedance 1 5 ~ 1 6 (10 g/cm .s)
Auto output power < 1.0 W
Battery Type Recommended Two pieces of 1.5 V DC battery ( SIZE AA LR6 )
Working Environment Temperature +5 C ~ +40 C
Humidity < 80% atmospheric pressure 86kPa – 106kPa
Transport and Storage Environment Temperature : -10 C ~ +40 C Humidity < 80%
Atmospheric Pressure : 86kpa ~ 106kPa, well-ventilated room without corrosive gases