Карманный фетальный допплеровский монитор сердца для беременных FHR сигнализация

Характеристики

          Ⅰ. Main Technical Specifications:    Working frequency： 2.0 MHz ± 10%  Ultrasonic output power:： Iob≤10 mW/cm2  Overall Sensitivity: ≥ 90 dB (Integrated sensitivity 200mm away from the 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 (± 2bpm). (Beat Per Minute)  FHR Accuracy: ± 2 BPM  Spatial-peak temp-peak acoustic pressure:≤ 0.1 MPa.  Negative Peak Sound Pressure:(p_)<1Mpa  Output Beam Intensity:(Iob)<20mW/cm2  Spatial-peak Temporal-average Derived Intensity:(Ispta)<100mW/cm2  Continuous working time: ≥5h (Low battery capacity or large volume may reduce working hours)  Coupling gel Acoustic impedance:1.5 ～1.6 (105g/cm2.s)  Audio output power：≤1.0W  Battery Type Recommended: Two pieces of 1.5 V DC battery (SIZE AA LR6).  Working environment: Temperatrue: +5 ℃ ~ +40 ℃ Humidity: ≤ 80% Atmospheric pressure: 86kPa ~ 106kPa  Transport and storage environment: Temperatrue: -10 ℃ ~+40℃ Humidity: ≤ 80%  Atmospheric pressure: 86kPa ~ 106kPa,well-ventilated room without corrosive gases.       Packing List : 1. Main Unit fetal doppler  2. User Manel 3. Retail Box