Product description:
Product: Ultrasonic Sensor

Construction ;  Water proof type
Center frequency  ;  40.0±1.0KHz
Sound pressure level ;  100dB min.
Sensitivity ;  -80dB min.
Capacitance  ;  1800Pf±20%
Ringing  ;  1.4ms max.
Maximum input voltage  ;  120Vp-p
Directivity  ;  70ºC;15ºC (-6dB)
Operating temperature  ;  -20 ºC~+70 ºC
Storage Temperature  ;  -40 ºC~+80ºC