Editorial Technical Reference

Ultrasonic Transducer

This page explains how Ultrasonic Transducer is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A piezoelectric device that converts electrical energy into high-frequency mechanical vibrations to atomize water in humidifiers.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Ultrasonic Transducer

Definition
An ultrasonic transducer is a critical component in ultrasonic humidifiers that uses piezoelectric ceramics to generate high-frequency vibrations (typically 1-3 MHz) when electrical current is applied. These vibrations create standing waves on a water surface, producing a fine mist of water droplets through cavitation and capillary wave phenomena, which is then dispersed into the air to increase humidity levels. The transducer is typically constructed with a piezoelectric ceramic element (PZT) bonded to a stainless steel diaphragm, housed in a brass casing, and sealed with epoxy. It operates within a frequency range of 1.7–2.4 MHz, with power consumption between 20 and 50 W, and requires a DC input voltage of 24 V ±10%. The mist output capacity ranges from 300 to 500 ml/h, depending on the specific model and operating conditions. The piezoelectric element diameter is typically 20–25 mm. The transducer is designed to operate in ambient temperatures from 5 to 60 °C and can be stored in temperatures from -20 to 70 °C. It offers an ingress protection rating of IP54 to IP65 per IEC 60529, indicating protection against dust and water jets. The weight of the transducer, including housing and cable, is typically 50–100 g, with a standard cable length of 300–500 mm. These specifications are typical reference ranges for household humidifier applications; actual values may vary by model. Always verify model-specific parameters and standards with the legal manufacturer or supplier before procurement or integration.
Working Principle
The transducer operates on the inverse piezoelectric effect: when alternating voltage is applied to piezoelectric ceramic elements, they expand and contract at ultrasonic frequencies. This mechanical vibration is transferred to a metal diaphragm, creating high-frequency oscillations in the water reservoir that break water into micron-sized droplets through cavitation and capillary wave action. The frequency of vibration determines the droplet size, with higher frequencies producing finer mist. The transducer is driven by an electronic circuit that supplies the appropriate voltage and frequency, typically within the specified operating range. The design of the diaphragm and the coupling to the water are critical for efficient atomization. Over time, mineral deposits or wear can affect performance, and the transducer may require cleaning or replacement. Failure to operate within the specified temperature or voltage ranges can degrade performance or cause damage.
Common Materials
Piezoelectric Ceramic (PZT), Stainless Steel Diaphragm, Brass Housing, Epoxy Sealant
Technical Parameters
ParameterTypical rangeNotes & selection driver
Operating Frequency1.7–2.4 MHzHigher frequency produces finer mist.
Power Consumption20–50 WTypical for household humidifiers.
Input Voltage24 ±10% V DCOperating range for driver circuit.
Mist Output Capacity300–500 ml/hAt rated power and frequency.
Piezoelectric Element Diameter20–25 mmCommon sizes for atomization.
Operating Temperature5–60 °COutside range may degrade performance.
Storage Temperature-20–70 °CNon-operating condition.
Ingress Protection RatingIP54–IP65Protection against dust and water jets.IEC 60529
Weight50–100 gIncluding housing and cable.
Cable Length300–500 mmStandard lead length.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Piezoelectric Ceramic Disc Part
    Converts electrical energy to mechanical vibrations through piezoelectric effect
    Material: Lead Zirconate Titanate (PZT) ceramic
  • Metal Diaphragm Part
    Transmits vibrations to water and creates atomization surface
    Material: Stainless steel or titanium
  • Housing Part
    Protects internal components and provides mounting interface
    Material: Brass or stainless steel
  • Electrodes Part
    Deliver electrical current to piezoelectric ceramic
    Material: Silver or nickel plating

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1 bar gauge
flow rate: 0.1 to 5 L/hr
temperature: 0°C to 60°C
slurry concentration: Not applicable - designed for clean water only
Media Compatibility
✓ Deionized water ✓ Distilled water ✓ Potable water with low mineral content
Unsuitable: Corrosive chemicals or abrasive slurries
Sizing Data Required
  • Required humidification capacity (mL/hr)
  • Available electrical power supply (V/Hz)
  • Tank/reservoir dimensions for mounting

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Piezoelectric crystal depolarization
Cause: Exposure to temperatures exceeding Curie point, mechanical shock, or prolonged operation at high power levels causing thermal stress and loss of polarization
Acoustic impedance mismatch and delamination
Cause: Deterioration of matching layers or bonding interfaces due to thermal cycling, moisture ingress, or chemical attack, leading to reduced energy transfer and signal loss
Maintenance Indicators
  • Significant drop in signal amplitude or sensitivity during routine testing, indicating reduced energy transmission efficiency
  • Abnormal audible noise (buzzing, rattling) or visible physical damage (cracks, discoloration) on transducer housing or coupling surface
Engineering Tips
  • Implement strict thermal management: maintain operating temperatures below Curie point with cooling systems, avoid rapid temperature cycling, and use thermal interface materials to dissipate heat from piezoelectric elements
  • Ensure proper acoustic coupling and handling: use appropriate couplants, apply correct mounting torque to avoid stress concentrations, store in controlled environments to prevent moisture absorption in matching layers, and perform regular impedance matching verification

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 18563-1:2015 (Non-destructive testing - Characterization and verification of ultrasonic phased array equipment) ASTM E494-15 (Standard Practice for Measuring Ultrasonic Velocity in Materials) CE Marking (EU Directive 2014/35/EU for electromagnetic compatibility and safety)

Quoted from the published standard.

Manufacturing Precision
  • Resonant frequency tolerance: +/- 2% of nominal frequency
  • Active element flatness: 0.05 mm across diameter
Quality Inspection
  • Impedance analysis test (to verify electrical characteristics and detect internal defects)
  • Acoustic performance test (measuring sound pressure level and beam profile in water tank)

Manufacturers of Ultrasonic Transducer

3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Broadsens
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
FBelec
Dongguan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Shenzhen Dianyingpu Technology Co., Ltd.
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
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Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
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Frequently Asked Questions

What is the typical operating frequency of this ultrasonic transducer?

The typical operating frequency range is 1.7–2.4 MHz. Higher frequencies produce finer mist, but the exact frequency depends on the specific model and application. Always check the datasheet or confirm with the manufacturer.

What input voltage is required?

The transducer requires a DC input voltage of 24 V ±10%. The driver circuit must supply this voltage within the specified tolerance to ensure proper operation and avoid damage.

What is the mist output capacity?

The mist output capacity is typically 300–500 ml/h at rated power and frequency. Actual output may vary depending on water temperature, humidity, and the specific design of the humidifier.

What ingress protection rating does it have?

The transducer has an ingress protection rating of IP54 to IP65 per IEC 60529, meaning it is protected against dust and water jets. This rating is a reference; verify the actual rating for the specific model with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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