Will this work in a school experiment with a D battery as the power source to make the buzzer go off when the circuit is complete?

I didn't have a D battery handy, but, It did work on a AA 1.5v battery. So, I would think it would work fine on your D battery. I use these as a circuit tester, for when I cant see my test light or meter on 12 volt systems.

The description somewhat confusing; Is tone one long beep....... or is it beep, beep, beep, etc?

It's a continuous high pitched "beep" noise as long as voltage is applied. Very similar tone to the backup beepers in vehicles. It does not pulse on and off unless you control the voltage on and off.

appropriate for a classroom lab?

Should work very well in teaching situation

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5Pcs SFM-27 DC 3-24V Electronic Buzzer Alarm Sounder Continuous Sound Beep (Pack of 5) CYT1083

Product ID: 49282932

Details

Brand
Cylewet
Color
Black
Control Method
Touch
Power Source
Corded
Voltage
24 volts

⚡3-24V versatile voltage range

📏Compact 3cm diameter

🔊100dB piercing sound

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Description

🔔 Don’t miss a beat—sound the alarm with style and power!

POWERFUL 100 D B ALERT - Cut through noise with crystal-clear, attention-grabbing sound.
COMPACT LIGHTWEIGHT - Sleek 3cm design with 11cm wire for easy, discreet installation.
DURABLE ALL WEATHER READY - Operates reliably from -20°C to +45°C, built to last in any environment.
WIDE VOLTAGE COMPATIBILITY - Seamlessly integrates with 3-24V systems for ultimate flexibility.
ENERGY EFFICIENT PERFORMANCE - Low 15mA current at 12V keeps your power consumption minimal.

This 5-pack of SFM-27 electronic buzzer alarms delivers a robust 100dB sound at 12V, compatible with a wide 3-24V range. Compact and lightweight with a 3cm diameter and 11cm wire, these buzzers operate efficiently at 15mA and withstand temperatures from -20°C to +45°C, making them perfect for versatile, reliable alert systems.

Specifications

ASIN	B075PT19J2
Audible Noise	100 db
Best Sellers Rank	#105 in Security Horns & Sirens
Brand	Cylewet
Color	Black
Control Method	Touch
Customer Reviews	4.5 4.5 out of 5 stars (724)
Item Weight	0.02 kg
Manufacturer	Qianxin
Mfr Part Number	CYT1083
Model Number	3216550315
Mounting Type	Wall Mount
Number of Items	5
Power Source	Corded Electric
Size	3cm /1.2in
UPC	743447407529
Unit Count	5 Count
Voltage	24 volts

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€ 14.67

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In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

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TrustScore 4.5 | 7,300+ reviews

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