Air Ultrasonic Ceramic Transducers 40kHz
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Prices updated: 13 Oct 2026
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About this product
Air ultrasonic ceramic transducers operating at 40 kHz, used as a transmitter and receiver for ranging and obstacle detection. They are commonly used in Arduino and microcontroller projects such as distance measurement and presence detection.
Specifications
- Frequency
- 40 kHz
- Type
- Air ultrasonic ceramic transducer
- Function
- Transmitter / receiver
Frequently asked questions
Do I need a driver circuit?
Yes. The transmitter is usually driven with a 40 kHz square wave, and the receiver signal is small, so it needs amplification before a microcontroller reads it. Many ready-made ultrasonic ranging modules already include this circuitry.
How do I tell the transmitter from the receiver?
Check the markings on each transducer or its datasheet, and wire each one to its matching driver or amplifier stage.
