Fetal Doppler

Fetal Doppler

• Working Frequency :  2.0 MHZ + 10%
• Ultrasonic output Power : lob<10 mW/cm2
• Overall Sensitivity: > 90dB (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 - 40cm / s
• FHR measuring range: No narrower than 50bpm-240bpm (+bpm). (Best per minute)
• FHR accuracy: + 2bpm
• Spatial-peak temp-peakacoustic pressure: <0.1 Mpa.
• Negative Peak Sound Pressure: (P_) <1Mpa
• Output Beam Intensity: (1st)<20mW/cm2
• Spatial-peak temporal-average derived intensity : (1_)<100mW/cm2
• Continuous working time: >5B (Low battery capacity or large volume may reduce working hours)
• Coupling gel acoustic impedance 1 5~1 6 (10 g/cm2)
• 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: -10C - +40C Humidity <80%
• Atmospheric Pressure: 86kPa - 106kPa, well ventilated room without corrosive gases