NU75E40TR-1 40mm 75kHz Ultrasonic Proximity Sensor

The NU75E40TR-1 is a piezoelectric ultrasonic transducer. It uses a ceramic element that vibrates at 75kHz when an electrical signal is applied, emitting sound waves. It then detects the reflected echoes to measure distance or detect presence, requiring external circuitry for signal driving and processing.

This transducer requires an external ultrasonic driver circuit capable of generating a high-voltage (typically tens of volts), short-duration pulse at 75kHz to excite the piezoelectric element. A separate receiver circuit with amplification and filtering is needed to process the returning echo signal for timing and distance calculation.

The ceramic housing provides good durability, but the sensor itself is not inherently sealed. For outdoor or harsh environments (moisture, dust), it must be integrated into a protected enclosure or assembly. Its performance can be affected by extreme temperatures, wind, or acoustic interference, which should be considered during system design.