wunder beta

📘 A detector turns particles into a warning

A detector turns particles into a warning

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

The alarm
Photoelectric
Ionization
Fire types
Thresholds
The horn
Power
Testing
Placement
The loop

Questions this course answers

How does a photoelectric alarm detect smoke?

Particles scatter chamber light into the photodetector.

What changes in an ionization chamber?

Smoke particles alter ion movement and reduce the measured current.

Why use dual-sensor alarms?

Ionization and photoelectric sensors respond to different physical conditions.

What does the horn's piezoelectric element do?

Voltage-driven flexing creates pressure waves.

What does a test button mainly verify?

It activates the warning path electrically without real smoke.

Grounded in trusted sources

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Every Wunder lesson is built from real, reputable sources — never invented.

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