Piezoelectric discs, also known as piezo discs, are widely used in electronics, sensors, medical devices, and ultrasonic applications. They work based on the piezoelectric effect, converting electrical signals into mechanical vibrations and vice versa. Among the most common sizes are 20mm, 35mm, and 50mm piezo discs, each designed for different applications depending on their frequency response and output power.
Piezo Disc
As a professional piezo disc manufacturer, Weifang Jude provides high-quality piezoelectric ceramic discs that are reliable, customizable, and suitable for industrial, medical, and consumer applications. In this guide, we will explore the features, applications, and differences between 20mm, 35mm, and 50mm piezo discs.
What is a Piezo Disc?
A piezo disc is a thin ceramic component that generates vibration or sound when subjected to an electric signal. Conversely, it can also detect mechanical vibrations and convert them into electrical signals.
Key characteristics include:
Material: Typically made of piezoelectric ceramics.
Shape: Circular, flat disc design for easy integration.
Size Impact: The diameter of the disc (20mm, 35mm, 50mm, etc.) affects frequency response, output power, and sensitivity.
Choosing the right size is crucial for achieving optimal performance in your project.
How Does Size Affect Piezo Disc Performance?
The diameter of a piezo disc plays a critical role in determining its resonant frequency, vibration amplitude, and output power. Understanding these relationships helps engineers and buyers choose the right size for their specific application.
1. Frequency Response
Smaller piezo discs (e.g., 20mm) → tend to have higher resonant frequencies.
They can produce sharper and higher-pitched vibrations.
Suitable for applications like ultrasonic sensors, distance measurement, and high-frequency sound generation.
Larger piezo discs (e.g., 50mm) → resonate at lower frequencies.
Rule of Thumb: The smaller the disc, the higher the frequency. The larger the disc, the lower the frequency.
2. Output Power & Amplitude
20mm piezo discs: Lower vibration amplitude, limited power output, but very sensitive. Ideal for detection and sensing.
35mm piezo discs: Balanced amplitude and power output, making them versatile for medical ultrasound or laboratory instruments.
50mm piezo discs: Larger surface area → stronger vibration amplitude and higher energy output. Perfect for devices that require continuous, powerful operation (e.g., ultrasonic cleaning).
3. Sensitivity & Detection Range
Smaller discs are more sensitive to small vibrations, making them suitable for microphones, sensors, and fine detection.
Larger discs have wider detection and stronger actuation, which is useful in sonar, acoustic testing, and large-scale transducers.
4. Integration & Device Design
20mm discs: Easy to integrate into compact and portable devices.
35mm discs: Fit medium-sized instruments where balance between performance and size matters.
50mm discs: Require more space but deliver industrial-level performance.
Practical Example
Ultrasonic sensor for robots → 20mm disc (high-frequency, compact).
Medical ultrasound probe → 35mm disc (balanced performance).
Ultrasonic humidifier → 50mm disc (strong vibration to atomize water).
Common Piezo Disc Sizes
20mm Piezo Disc
The 20mm piezo disc is one of the most commonly used sizes for compact applications.
Features:
Applications:
Ultrasonic sensors for distance measurement.
Small buzzers and alarms.
Portable medical devices.
Weifang Jude Advantage:
Our 20mm piezo discs are manufactured with strict quality control, ensuring stable resonance frequency and long service life. They are widely used by customers in electronics and medical industries.
35mm Piezo Disc
The 35mm piezo disc offers a balance between frequency and output strength, making it suitable for medium-scale applications.
Features:
Applications:
Ultrasonic transducers in medical equipment.
Experimental instruments.
Sonar and acoustic testing devices.
Weifang Jude Advantage:
Weifang Jude supplies 35mm piezo discs with customizable frequency and coating options, supporting different industrial requirements.
50mm Piezo Disc
The 50mm piezo disc is a larger-size component designed for high-output applications.
Features:
Strong vibration and output power.
Lower frequency response compared to smaller discs.
Suitable for continuous use in industrial environments.
Applications:
Weifang Jude Advantage:
Weifang Jude’s 50mm piezo discs are known for durability and efficiency. They can be customized for frequency, thickness, and electrode patterns, ensuring optimal performance for industrial and consumer devices.
Comparison: 20mm vs 35mm vs 50mm Piezo Disc
Size | Frequency Response | Output Power | Typical Applications |
20mm | Higher frequency | Lower output | Sensors, small buzzers, portable devices |
35mm | Balanced | Medium output | Medical ultrasound, lab instruments, sonar |
50mm | Lower frequency | Strong output | Humidifiers, industrial cleaning, large transducers |
Selection Tip:
Choose 20mm piezo discs for compact, high-frequency devices.
Choose 35mm piezo discs for balanced performance.
Choose 50mm piezo discs for strong output and industrial applications.
Why Choose Weifang Jude Piezo Discs?
As a leading piezo disc manufacturer in China, Weifang Jude offers:
High Quality: Manufactured under ISO standards with strict testing.
Customization: Size, frequency, and coating options available.
Experience: Decades of expertise in piezoelectric ceramics.
Global Service: Reliable supply and technical support for worldwide customers.
Our 20mm, 35mm, and 50mm piezo discs are trusted in electronics, medical, and industrial sectors.
Conclusion
The choice between 20mm, 35mm, and 50mm piezo discs depends on your application needs. Smaller discs offer higher frequency response, while larger discs provide stronger output power.
At Weifang Jude, we are committed to delivering high-performance piezo discs with custom solutions to meet your project requirements.
Contact Weifang Jude today to request samples, discuss custom specifications, or get a quote for bulk orders.