How does the driver know to drive the piezo vibrator only when it is covered with water?

I dont know but it did not work for me at al. Had to throw the humidifier out. I tried 2 different pieces...same result. I wouldnt trust this at all.

Hello, how thick is the seal/gasket? Does it hold the disc at an angle?

With my humidifier I had to use my gasket/seal, and it lays flat.

What voltage is needed?

Hello,Mine was for an essential oils diffuser. I don't know a lot about electronics but I know this hooked into a 12v fan and power source. Hope this helps🤔

Deliver to EGYPT

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5PCS 20/25mm Ultrasonic Mist Maker Fogger Ceramics Discs with Wire & Sealing (20mm with Wire)

5PCS 20/25mm Ultrasonic Mist Maker Fogger Ceramics Discs with Wire & Sealing (20mm with Wire)

Product ID: 117126486

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Details

Grit Material
Ceramic
Product Dimensions
0.79"L x
Brand
Bolsen
Compatible Devices
Angle Grinder
Grit Type
Medium

⚡Ultrasonic tech, no heat or chemicals

💧20/25mm precise mist diameter

🔧Includes wire & sealing for easy setup

Description

💨 Elevate your space with whisper-quiet, chemical-free mist magic!

PLUG PLAY CONVENIENCE - Comes with wire and sealing for effortless integration with your control panel.
VERSATILE COMPATIBILITY - Perfect for home, office, or creative projects needing reliable mist generation.
SAFE ULTRASONIC TECHNOLOGY - Operate without heat or harmful chemicals—pure, eco-friendly misting.
DURABILITY MEETS SIMPLICITY - Long service life with easy operation—set it and forget it.
CRYSTAL CLEAR MIST PRECISION - Experience consistent 20/25mm mist diameter for flawless ambiance.

This 5-piece set of 20mm and 25mm ultrasonic mist maker ceramic discs delivers precise, chemical-free misting using advanced ultrasonic technology. Designed for easy installation with included wiring and sealing, these durable discs ensure long-lasting, safe operation without heat, ideal for enhancing ambiance in professional or personal environments.