Ultrasonic Piezoelectric Humidifier Moisture Film Humidification 25mm

(5 customer reviews)

In stock

SKU: 43990
  1. Operating Voltage: DC 3.7-12V.
  2. Resonant Frequency: 1.77 MHz
  3. Resonant impedance: <2 ohms.
  4. Coupling factor : > 52%.
  5. Electrostatic capacity: 3000 pF.
  6. Spray quantity : > 110 mL/h .
  7. Low noise operation
  8. Small fog particles


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Category: Ultrasonic Humidifier Module
Tags: Humidifier, Ultrasonic Mist Maker, Mist Maker, Piezoelectric Transmitter, Piezoelectric, Ultrasonic Humidifier

This Ultrasonic Humidifier Moisture Film Humidification atomization machine is suitable for high power, atomization plate tablet with a diameter of 25mm. This Ultrasonic Humidifier Moisture Film Humidification 25mm Piezoelectric Transmitter module works on the principle of cavitation produced by sound waves. As sound waves contain compression and rarefaction.

Due to extremely rapid movement, water droplets can no longer sustain their liquid state and gets converted into vapor immediately. This vibration is produced by a piezoelectric filament.

Note: This Module Needs Power Driver Board to drive, which is not included in a package. you have to buy it Separately.

The Ultrasonic Principle of Operation

A piezoelectric transducer immersed in a water bed, converts a high frequency, electronic signal into a high-frequency mechanical oscillation.  As the oscillation speed is increased to a level where the water particles can no longer follow the oscillating surface, a momentary vacuum and strong compression occur, leading to the explosive formation of air bubbles (cavitation).  At cavitation, broken capillary waves are generated, and tiny (1-micron diameter) droplets break the surface tension of the water and are quickly dissipated into the air, taking vapor form and absorbed into the air stream.


The principle of ultrasonic humidification is based on the superposition of two effects:
  1. Cavitation bubble implosion

    The change in the amplitude of the oscillator gives rise to a powerful water hammer effect that releases tiny cavitation bubbles. The implosion of the bubbles on the surface emits tiny water aerosols into the ambient air.

  2. Capillary wave theory

    The ultrasonic oscillators generate regularly formed Rayleigh surface waves in the water tank. Minute water aerosols also emitted into the ambient air on the crests of these waves.

By superimposing these two effects, the use of ultrasonic humidifiers enables a homogeneous aerosol mist to produce with minimal energy consumption!

Application :
  1. Humidifier.
  2. Beauty care for facial massager.
  3. Medical liquid atomizing.
  4. Equipment.

Features : 

  1. Low noise operation
  2. Small fog particles.
  3. Low noise operation.
  4. Small fog particles.
  5.  Long operation life.
  6.  High stability.

Package Includes :

1 x Ultrasonic Humidifier Moisture Film Humidification Sensor Module.

Operating voltage (v)

DC 3.7 ~ 12

Resonant Frequency (MHz)


Resonant Impedance (Ω)


Coupling factor


Electrostatic capacity

3000 pF

Spray quantity

> 110 mL/h

Outer Diameter (mm)


Shipping Weight 0.03 kg
Shipping Dimensions 5 × 5 × 1 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Based on 5 reviews

4.0 overall

Add a review

  1. Susavan (verified owner)

    The product is of good quality & works perfectly with my 1.7 MHz oscillator circuit creating lots of mist with splash of water, but could not be able to resonate it with 113 KHz freq as described.


  2. Nikhil (verified owner)

    This product is not working for me… Defective


  3. Sarfraz Raja (verified owner)

    renewed my costly humidifier, which i was going to throw

    Sarfraz Raja

  4. [email protected]


    [email protected]

  5. rupandey642 (verified owner)

    Fantastic product from ROBU want to buy more.


Questions and answers of the customers

  1. 0 votes
    There are no answers for this question yet. Answer now
  2. 4 votes
    A You can buy the board from our site or if you are ... Read more
  3. 4 votes
    Q is there any driver board for this ultrasonic humidifer available in this site answer now
    Asked by albinkuriakose333 on December 14, 2019 3:26 pm

    You can check Read more

  4. 0 votes
    Q Working amps answer now
    Asked by a.thagu1 on November 10, 2019 8:24 am

    it consumes 20mamp of current.

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Country Of Origin: China