2000KHz Piezo Transducer Disc 25mm Ultrasonic Sensor Guide

Understanding the Role of Piezoelectric Discs in Ultrasonic Sensor Modules

A 2000KHz piezo transducer disc with a 25mm diameter sits at the core of many ultrasonic sensor modules, converting electrical energy into precise mechanical vibration for distance measurement, flow sensing, and industrial detection tasks. For engineers sourcing this type of component, the two variables that matter most are frequency stability and diameter consistency, since both directly determine detection range, resolution, and signal clarity within the finished sensor module. Selecting a supplier with proven control over the full ceramic production process—rather than one that only assembles finished parts—is therefore a critical decision point for procurement and design teams.

Engineering Precision Across Diameter and Frequency Specifications

Gd SWT Smart Tech Co., Ltd.(www.swt99.com) (brand name SWT) has built its piezoelectric disc and diaphragm portfolio around exactly this kind of dimensional and frequency precision. The company’s Piezoelectric Diaphragms/Discs line already spans multiple diameters, including the 3B12+9.0TEAWC (12mm), 3S27+3.9EA (27mm), and 3B35+2.6EA (35mm) models, each offered with soft and hard ceramic material options and diverse electrode patterns, such as double-sided and single-sided configurations. On the frequency side, SWT’s Ultrasonic Distance Sensors, including the USC10T/R-40MPWA (10mm, 40KHz) and USO16T-40MPWA (16mm), demonstrate the company’s capability in non-contact measurement components with waterproof, anti-corrosion construction and a small blind zone. Its Ultrasonic Cleaning Transducers, such as the 8SS-5020W (20KHz) and 4SH-3528CA (28KHz, 60W), extend the frequency range further, while the Glass Glaze/Ultrasonic Atomization Sheets, such as the ATD16-2400GSW (16mm, 1700KHz) and ATD20-170GSW (20mm, 1700KHz), confirm the company’s manufacturing reach into the higher end of the ultrasonic spectrum. This breadth across both diameter and frequency categories reflects the kind of engineering flexibility required when developing a specific configuration like a 2000KHz, 25mm piezo transducer disc for an ultrasonic sensor module.

Integrated Manufacturing Advantage

What distinguishes SWT in the piezoelectric component space is its comprehensive control over front, middle, and rear processes of piezoelectric ceramic production, including film squeezing, casting, and dry pressing. Thin sheet formation relies on tape casting (flow casting), while thick sheet formation uses dry pressing, with complete processing covering squeezing, laminating, sintering, polarizing, and automated testing. This integrated supply chain allows the company to maintain an annual output reaching approximately 250 million units for its piezoelectric components. Production takes place across two facilities: the Dongguan Headquarters, spanning 24,000 square meters with 170 staff members, and the Guizhou Branch (Bijie City), covering 4,000 square meters with 40 staff members. Supporting this output is a team of 70–85 R&D and engineering personnel and over 400 sets of instruments and equipment, including large-scale automatic tunnel furnaces and automated assembly machines.

Certification, Standards Authority, and Quality Assurance

For components destined for ultrasonic sensor modules used in automotive, industrial, or safety applications, certification credentials matter as much as raw specifications. SWT holds IATF 16949:2016 for automotive quality management, along with ISO 9001:2015 and ISO 14001:2015, and its products comply with RoHS and REACH requirements. Beyond certification, the company serves as a primary drafter of Chinese industry standards for buzzers, ultrasonic atomizers, and piezoelectric sensors, having officially drafted the “Piezoelectric Sounders and Piezoelectric Buzzers” and “Electromagnetic Sounders and Electromagnetic Buzzers” standards. This standard-setting role, recognized by the Quality and Technical Supervision Bureau of Guangdong Province, positions SWT with a level of technical authority that goes beyond typical component manufacturing.

Proven Performance Through Long-Term Partnerships

Long-term supplier relationships offer a practical way to evaluate real-world reliability. SWT has maintained a stable supply relationship for over 18 years with Panasonic and Sanyo, dating back to 2005 and 2007 respectively, with zero-defect quality performance supporting global automotive safety standards. Its partnership with VTech, the world’s leading manufacturer of corded/cordless telephones and electronic learning products, has continued since 2004, enabling high-quality audio feedback in millions of consumer devices annually. Whirlpool, a global manufacturer of home appliances, has sourced customized acoustic solutions from SWT since 2010 for its premium appliance lines. CASIO, a Fortune 500 company from Japan, has maintained a partnership of over 15 years. Customers consistently point to SWT’s “professional problem-solving,” “excellent quality,” and “strong service awareness” as the reasons behind these decades-long relationships—qualities directly relevant to buyers seeking a dependable source for precision components like a piezo transducer disc for sensor integration.

Service Model Supporting Custom Disc Development

For a specification such as a 2000KHz, 25mm piezo transducer disc, the development process typically requires close technical collaboration rather than off-the-shelf selection. SWT’s service model is built around one-on-one technical service solutions and customized product development (OEM/ODM), covering technical consulting, design optimization, reliability testing, and mass manufacturing. Its in-house reliability laboratory supports acoustic curve testing and environmental stress screening, which is essential for validating a new disc configuration before mass production. On the delivery side, the company offers a sample lead time of 3–7 days, a bulk production lead time of 15–20 days, and 24-hour on-site response within the Pearl River Delta region.

Conclusion

As a National High-Tech Enterprise and recognized Specialized and Innovative “Little Giant” Enterprise, SWT operates as a professional acoustics solution provider specializing in the R&D, manufacture, and marketing of electronic ceramic materials, smart materials, and electroacoustic transducer components. With a product range that already covers diaphragms from 12mm to 35mm and frequencies spanning 20KHz to 1700KHz across its buzzer, sensor, and atomization lines, combined with an integrated ceramic production chain, IATF 16949:2016 certification, and a top-3 industry ranking, the company demonstrates the technical foundation and manufacturing discipline relevant to engineering a 2000KHz piezo transducer disc at 25mm diameter for ultrasonic sensor module applications.