Anatomical Models
DC Motors
Light (Optics)
Lab Supplies
pH meters
pH Papers
Weights/ Masses

Please select from the list below or the links on the right. 

Bells and Buzzers

Small mechanical buzzers are recommended for educational projects, toys, instrument alarms and other applications requiring an audible signal.

Rectangle Buzzers

Each buzzer measures about one inch in length and has two screw holes on the sides for mounting. Buzzers are available in white and black colors. Has a hard ABS plastic shell. The red contact wire is for positive (+) and the black contact wire is for negative (-) of DC power source or battery.

Buzzer diagram


Rated Voltage: 1.5 Volts
Operating Voltage: 1 - 3 Volts
Rated current:max.20mA;
Operating temperature range:-10c~+60c;
Storage temperature range:-10c~+70c;
Size: 23mm x 17mm x 15.5mm.
Fundamental frequency: 400 100 Hz.
Color: Black
Weight: 10 g
Lead Wires: Black and red, 9"

(Operates with 1 or 2 batteries/ Cells).

buzzer, square, black

Pictures are linked to the price and availability


Rated Voltage: 1.5 Volts
Operating Voltage: 1 - 3 Volts
Rated current:max.20mA;
Operating temperature range:-10c~+60c;
Storage temperature range:-10c~+70c;
Size: 23mm x 17mm x 15.5mm.
Buzzing frequency: 400 100 Hz.
Color: White
Weight: 10 g
Lead Wires: Black and red, 9"

(Operates with 1 or 2 batteries/ Cells).

Buzzer, square, DC, white


Size: 23mm x 17mm x 15.5mm.
Buzzing frequency: 400
100 Hz.
Color: White
Rated Voltage: 9 Volts
Operating Voltage: 1 - 3 Volts
Weight: 8.5 g
Lead Wires: Black and red, 5"

This product is also available in 3-volt version operating at 1.5 - 4.5 volts.

3V Buzzer

9-Volt Buzzer

Round Buzzer

A well-constructed electro mechanical buzzer designed to last. Consists of an electronic circuit board, an electromagnet and a strong Neodymium magnet attached to a spring, all compacted in a strong shell.

Nominal voltage is 3 Volts. Operates with 2 Volts up to 6 volts. Connection wires are 8 inches (20 cm) long with 3/8" (1 cm) stripped and tinned on the ends for easy connections. Connection wires are 26 AWG UL1007 certified.

Specifications of BZRW3R Buzzer:
Description Value
Rated Voltage (VDC) 3
Operating Voltage (VDC) 2~5
Resonant Frequency (Hz) 400100
Rated Current (mA) <=20
Sound Output at 10cm (dB) >=85
Operating Temperature C 20~+60
Storage Temperature C -30~+70
Weight (g) 10.5

The mechanical drawing of this buzzer shows the size and the dimensions.

Small DC Buzzer, Round, White

(Operates with 1 or 2 batteries/ Cells).

Small Buzzer, Mechanical Drawing

Piezoelectric Ceramic Buzzer

This high frequency buzzer or beeper can operate with any DC voltage starting 1.5 volts up to 20 volts, making it one of the most versatile, safe and durable sound devices. BZRP2418 is loud enough to be used as equipment alarm, door alarm, Telegraph device, Buzz wire game, and many other application. It produces a sound at frequency of about 3200 with a sound output of 85 db or more at 10 cm distance. Has two pins for contacts. Piezo Buzzer, 2 pin, 1.5V ~ 20V

Piezo Buzzer mechanical drawing

Model BZRP2418A
Rated Voltage (DCV) 1.5
Operating Voltage (DCV) 3 ~ 20
Rated Current (mA) <= 5
Sound Output at 10cm (db) >= 85
Resonant Frequency (Hz) 3200500
Operating Temperature (C) -20 ~ 65
Storage Temperature (C) -30 ~ 75
Weight (g) 5.4
Housing Material PBT
RoHS Compliant Yes
Housing Size D:24 mm, H:16 mm
Pin Length 7 mm
BZRP2418 is a low current buzzer so that it can also operate with low current power sources such as solar panels and coin batteries.

Polarity is marked with + and - signs at the bottom of the buzzer near each contact. The + contact must be connected to the positive side of your power source and the - contact must be connected to the negative side of your power source.

High frequency sound travels longer distances.

We can custom produce this buzzer with contact wires at any length instead of the pins.

Piezo Buzzer Price and Availability

Electro-mechanical buzzer, Educational model

This electromechanical buzzer is an educational tool to show how buzzers work and how electricity can be used to produce sound, vibration and mechanical movements. All components are exposed and easy to understand.

This product is NOT designed for mounting on the wall and long term use. It can operate with both AC and DC current. Recommended voltage for experimenting with this buzzer is 2 to 6 volts.

Used as a learning/ training aid.

Limited quantities are available. Order online or view price and availability of this educational buzzer.

Electric Door Bell with 4" Gong

This door bell is professional/ traditional door bell for use with battery or transformer.
Works with a wide range of voltages including:

  • 8 to 16 Volt AC
  • 3 to 6 Volt DC

For professional use or for science experiments. The cover plate can be removed to expose mounting holes or for inspection, alignment or tuning the bell.

Electric Bell

This product does not come with any instructions. Simply remove the cover and you will see two connection screws where you connect your wires. (Warning: Not a toy. Please do not order this if you don't know how to use or install it).

The ends of wire are stripped and tinned for easy connection or soldering. (Click on the pictures to check the price and availability)

Distributors of scientific and educational products

Where to buy?

Most pictures are linked to the pricing and online store for fast and convenient ordering

Our products are available at the following online stores. For large orders please call in advance and verify the availability, wholesale discounts and shipping options. If you cannot find any product in the online store of your choice, please use the search option of the store or call (973)777-3113 for further assistance.


  All orders will be shipped from our warehouse in United States (USA). We ship worldwide to most countries including U.S., Canada, Australia, United Kingdom, New Zealand, Germany, France, Netherlands, and many other countries.

List of metals for science experiments


Miniature Light Bulb
Miniature Light Bulbs
Miniature Lamp holder
Miniature Lamp Holders

Metal lamp holders

Test Leads

Plastic Battery Holders

Buzzer, 3-V DC

Crystal Earphone
Simple Switch, Knife Switch
Simple Switch


Banana Jack
Banana Jacks
banana Plug
Banana Plugs
Binding Post
Binding Posts
Dynamo, Bicycle Generator
Dynamo, Generator
Electric Bell
Bells and Buzzers
Magnet Wire
Magnet Wire
Transformer Coil, Educational
Transformer Kit

Knife Switch with plastic screw connectors


UV Lamp/Fixture

Thermoelectric Cooler
Battery Holder, Metal, D Size
Metal Battery Holders

Thermoelectric Generator

Portable UV light (Blacklight)

Push Button Switches

Subminiature light bulbs

Plasma Ball

Educational Buzzer

Electric Bell

Copyright 2005 MiniScience Inc.