Product Overview
The 10×10mm High Sensitivity SMD Ultrasonic Transducer is a compact 40kHz ultrasonic transmitter designed for distance measurement, obstacle detection, and smart sensing applications. It is widely used in ultrasonic ranging systems, robotics, parking sensors, IoT devices, and industrial automation.
With high acoustic output power and stable performance, this SMD ultrasonic transducer delivers reliable signal transmission for precision measurement systems requiring miniaturized and surface-mount components.
Key Features
• Compact 10×10mm SMD package for PCB integration
• 40kHz center frequency optimized for distance sensing
• High sound pressure level ≥110dB for strong signal output
• Stable capacitance and consistent acoustic performance
• Wide directivity angle suitable for sensing coverage
• Ideal for ultrasonic ranging and obstacle detection systems
Applications
This ultrasonic transducer is commonly used in smart robots, obstacle avoidance systems, parking assistance sensors, liquid level detection, proximity sensing, smart home devices, and IoT-based measurement solutions. It is suitable for both consumer electronics and industrial sensing environments.
Working Principle
The transducer emits ultrasonic waves at 40kHz when driven by an electrical signal. These waves reflect from objects and return to the receiver, allowing distance measurement based on time-of-flight calculation. Its stable frequency response ensures accurate and repeatable detection results.
Technical Specifications
| Using method | Transmitter |
| Center frequency | 40±1.0 KHz |
| Sound Pressure Level | ≥110 dB |
| Capacitance | 2200±25% pF at 1KHz |
| Directivity | 70°±15° (-6dB) |
| Maximum input voltage | 160 Vp-p |
| Detectable range | 0–1200 cm |
| Housing material | Plastic |
| Operating Temperature | -20℃ to +80℃ |
Installation & Usage
The SMD ultrasonic transducer is designed for direct PCB mounting. It should be integrated into ultrasonic driver circuits with proper impedance matching to ensure optimal acoustic output. Care should be taken to avoid mechanical stress and improper soldering conditions during reflow assembly.
For best performance, ensure proper alignment and spacing in the final housing design to minimize signal interference and acoustic attenuation.
FAQ
What is the main use of a 40kHz ultrasonic transducer?
It is mainly used for distance measurement, obstacle detection, and proximity sensing in robotics, automotive systems, and smart devices.
Can this transducer be used for both transmitting and receiving?
This model is designed primarily as a transmitter, but it is often paired with a matching receiver for complete ultrasonic sensing systems.
Is it suitable for PCB surface mounting?
Yes, it is designed in an SMD package for easy integration into PCB-based electronic assemblies.
What affects measurement accuracy in ultrasonic systems?
Accuracy can be affected by temperature, air turbulence, object surface material, and circuit design quality.
Where is this sensor commonly used?
It is widely used in smart robots, parking sensors, liquid level systems, and IoT distance measurement applications.
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