Item

Parameter

Remark

Resonant frequency   

40±1.0kHz

Echo Sensitivity

≥150mV

Simulation test circuit see Figure 1.

Decay Time

≤1.05ms

Directivity (X)

120±15°

Directivity test see Fig 2.

Directivity (Y)

60±10°

Electrostatic Capacitance

1800±15%pF

1kHz/25

Input voltage

≤140Vp-p

40kHz/ pulse width 0.5ms/ interval 20ms

Mean Time to Failure

50000h

Operating temperature

-40+80

Storage temperature

-40+85