Center frequency (KHz)ZX频率 40±1.0
Echo Sensitivity (mV)回波 ≥200(Fig. 4 Test Circuit)
Decay Time (ms)余振 ≤1.2(Fig. 4 Test Circuit)
Directivity (deg) X-axis水平角度 110±15(Fig. 4 & Fig. 5 Test Circuit)
Directivity (deg) Y-axis垂直角度 75±10(Fig. 4 & Fig. 5 Test Circuit)
Capacitance (pF)电容 2000±15%(at 25℃,1KHZ)
Allowable Maximum Input Voltage(Vp-p)
zui大输入电压 140(40KHz) Pulse width 0.5ms, interval 20ms
Mean Time To Failure (h)平均失效时间 50000(Normal room temperature)
Operating Temperature(℃)工作温度 -40~+80
Storage temperature(℃)贮存温度 -40~+85