Description:

Ultrasonic transducers or ultrasonic sensors are a type of acoustic sensor divided into three broad categories: transmitters, receivers and transceivers.
Transmitters convert electrical signals into ultrasound, receivers convert ultrasound into electrical signals, and transceivers can both transmit and receive ultrasound.
Ultrasonic transducers are used in systems which evaluate targets by interpreting the reflected signals.
T refers the transmitter, R refers receiver.

Specification:
Model: TCT40-16T/R
Type: Transmitter and Receiver
Size: 16 x 12mm / 0.63" x 0.47" (D*T)
Nominal Frequency (kHz): 40kHz
Emission Pressure at 10V (0dB=0.02mPa): >117dB
Receiving Sensitivity at 40KHz (0dB=V/ubar): >-65dB
Electrostatic Capacity at 1KHz,

Package Includes:
1 x Ultrasonic Transmitter
1 x Ultrasonic Receiver