Introduction: A Closer Look at the 20mm 1.7MHz Glass Glaze Piezo Atomizer

For engineers and procurement teams evaluating ultrasonic atomization sheets for humidification systems, the 20mm 1.7MHz glass glaze piezo atomizer—identified in the product catalog as ATD20-170GSW (20mm, 1700KHz)—represents a distinct category within Gd SWT Smart Tech Co., Ltd.'s (Dongguan Sweetsound) Ultrasonic Atomization Series. This component is positioned for high-power nebulization, primarily serving humidifiers and landscaping-related humidification needs. Understanding its technical construction, driving mechanism, and the manufacturing foundation behind it helps clarify why this product line is relevant to a wide range of industrial and household humidification applications.

Product Positioning and Core Features

The Glass Glaze/Ultrasonic Atomization Sheets product line, of which the ATD20-170GSW is a key model, is described as offering high-power nebulization for humidifiers and landscaping. Beyond standard household humidification, this large output piezo atomizer is also applied to humidification systems, as well as to farms and animal husbandry settings—environments that often require sustained, high-volume moisture output rather than the fine, medical-grade particle sizes associated with SWT's separate microporous mesh atomizer line.

A notable structural feature of this product category is its multi-head compatibility. The atomizer is described as being suitable for multi heads, with configurations including 2, 4, 6, 8, 10, and 12 heads. This flexibility allows the same core piezoelectric element to be scaled across different humidification system designs, from smaller multi-outlet units to larger installations requiring higher-capacity moisture output, without requiring an entirely different component design for each configuration.

The ATD20-170GSW operates at 20mm in size with a frequency of 1700KHz (1.7MHz). This sits alongside a companion model in the same family, the ATD16-2400GSW, which uses a 16mm diameter element. The presence of both 16mm and 20mm variants within the glass glaze atomizer line indicates that SWT engineers this product category to accommodate different sizing requirements while maintaining the same underlying atomization sheet technology.

Driving Method and Circuit Design

One of the more technically detailed aspects of this product category is its driving method, which is directly tied to how the ultrasonic humidifier circuit functions. According to the technical description, the ultrasonic humidifier circuit consists of a power supply circuit, an oscillator circuit, and a water level control circuit.

The process begins when AC voltage is stepped down by a transformer and then passed through a bridge rectifier filter circuit. This step serves a dual purpose: it provides working voltage for the water level control circuit and oscillator, while simultaneously emitting corresponding frequency signals to drive the oscillator to operate. This causal sequence—from AC input, through transformer step-down, through rectification and filtering, to powering both the water level control system and the oscillator that ultimately drives the piezoelectric element—illustrates a coordinated circuit design rather than a standalone atomizer sheet operating in isolation. For system integrators, this means the ATD20-170GSW is designed to function as part of a complete driving architecture rather than a purely passive component.

Manufacturing Foundation Behind the Product

The glass glaze piezo atomizer benefits from SWT's broader manufacturing capabilities, which span the front, middle, and rear processes of piezoelectric ceramic production. This includes film squeezing, casting, and dry pressing—an integrated supply chain approach that the company identifies as a differentiated advantage. Specifically, 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 end-to-end control is reinforced by scale: SWT maintains what it describes as the largest production capacity in mainland China for specific piezoelectric components, with an annual output reaching approximately 250 million units. For buyers of the 20mm 1.7MHz glass glaze atomizer, this scale suggests the manufacturing infrastructure exists to support both smaller sample orders and larger bulk production runs.

On the delivery side, SWT's stated capabilities include a sample lead time of 3–7 days and a bulk production lead time of 15–20 days, along with 24-hour on-site response within the Pearl River Delta region. These timelines are relevant to procurement planning for humidification system manufacturers who need predictable component availability.

Certifications and Quality Compliance

The Ultrasonic Atomization Series, which includes the glass glaze glaze sheets, is described as matching a specific set of quality and regulatory standards: ISO13485, ISO14001, ISO9001, IATF16949, RoHS, REACH, MDR (EU2017/745), and FDA Requirement. This combination of certifications spans general quality management (ISO9001), environmental management (ISO14001), automotive-grade quality systems (IATF16949), medical device standards (ISO13485, MDR), and chemical/substance compliance (RoHS, REACH), along with FDA-related requirements. For buyers sourcing components destined for markets with strict regulatory oversight, this certification profile is a relevant point of due diligence.

Application Context Within SWT's Broader Product Ecosystem

Within SWT's stated industry coverage, the Smart Home & Appliances segment explicitly references feedback sounders for white goods and USB humidifiers, indicating that humidification-related components are an established part of the company's addressed market. The glass glaze atomizer's application to farms and animal husbandry further extends its relevance beyond consumer humidifiers into agricultural and industrial humidification contexts.

Company Background

Gd SWT Smart Tech Co., Ltd., operating under the brand name SWT (registered in 2002), traces its piezoelectric production roots to 1991, when its predecessor, South China Electronics Company Limited, began piezo production in Guangzhou. The company is positioned as a professional acoustics solution provider and high-tech enterprise specializing in the R&D, manufacture, and marketing of electronic ceramic materials, smart materials, and electroacoustic transducer components. SWT also serves as a primary drafter of Chinese industry standards covering buzzers, ultrasonic atomizers, and piezoelectric sensors, reflecting its established role within the domestic piezoelectric ceramics industry.

Conclusion

The 20mm 1.7MHz glass glaze piezo atomizer (ATD20-170GSW) fits within SWT's Ultrasonic Atomization Series as a high-power nebulization component suited for multi-head humidification systems, agricultural humidification, and landscaping applications. Its documented driving circuit design, combined with SWT's integrated manufacturing process and applicable certifications including ISO13485, IATF16949, RoHS, REACH, MDR, and FDA requirements, provides a technically grounded option for organizations evaluating piezoelectric atomization sheets for humidification-focused product development.

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