10
• Overall sensitivity at the distances 8 in. from the face of the probe
(Doppler frequency: 500 ± 50Hz)
• Target velocity
: 4 in./s ~ 16 in./s: ≥ 90d
• Spatial-peak temporal-peak acoustic pressure
: ≤ 1MPa
• Output power
: < 20mW
• Effective area of the ultrasonic transducer active element
: 1 sq in. ± 0.1 sq in.
• Acoustic coupling medium for normal use
: ph: 5.5~ 8
• Acoustic impedance
: ≤ 1.7*10
5
g / cm
2.
s
• Working mode
: Continuous wave Doppler
• Audio Output Power
: < 0.5 W
• Audio Out Socket
: Φ 0.14 in./USB interface
3. Recommended battery type
:
9V DC alkaline battery (IEC Type No. 6F22 or equivalent)
4. Stand-by Time
:
> 4 hours
5. Recommended gestation for use
:
16 gestational weeks or later, depending
on pregnancy
6. Physical Characteristic
:
Size
: 0.04 in. (Length) * 2 in. (Width) * 2.8 in. (Height)
Weight
: 2.5 oz (only main unit, not including battery)
7. Environmental Requirements
:
Operating Conditions
:
Temperature
: 41°F to 104°F (50°C to 40°C)
Humidity: 0 to 80% RH, non-condensing
Atmospheric pressure: 86kPa to 106kPa
Storage and shipping conditions
:
Temperature: -4°F to 131°F (-20°C to 55°C)
Humidity: 10 to 93% RH, non-condensing
Atmospheric pressure: 50kPa to 106kPa
Humidity
: 10 to 93% RH, non-condensing
Atmospheric pressure: 50kPa to 106kPa
