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Piezoelectric Earphones/Crystal Earphones
Ultra-sensitive crystal earphones for high-quality sound. These earphones are at least 10 times more sensitive than very sensitive magnetic earphones, dynamic earphones, and electrostatic earphones. Piezoelectric earphones are used in the construction of the crystal radio and in some science experiments such as listening to electric fish.
Key Features:
- Ultra-sensitive crystal earphones
- High-quality sound
- Very high impedance of 20K ohm
- Sensitivity of 57 dB at 1KHz
- Frequency range of 200 ~ 8000 Hz
- 3ft twisted cable
- Operation temperature of -20º to 60º Celsius
Product Specifications:
Impedance | 20K ohm |
Capacity | 15,000 pf |
Sensitivity | 57 dB at 1KHz |
Frequency Range | 200 ~ 8000 Hz |
Operation Temperature | -20º to 60º Celsius |
Cord | 3ft twisted cable |
Plug Type | none |
Similar Products:
- Dynamic Earphones
- Electrostatic Earphones
- Magnetic Earphones
- Bluetooth Earphones
- In-Ear Monitors
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
Perfect for audiophiles, sound engineers, musicians, and anyone who appreciates high-quality sound.
Piezoelectric Earphones
Piezoelectric Earphones, also known as Crystal Earphones, are the most sensitive earphones available. They are at least 10 times more sensitive than magnetic earphones, dynamic earphones, and electrostatic earphones. Sensitive earphones have a very high impedance, which is measured in ohms.
Crystal Earphones are commonly used in the construction of crystal radios and in science experiments such as listening to electric fish.
Includes a mono plug.
Key Features
- The most sensitive earphones available.
- High impedance for improved sound quality.
- Can be used in science experiments.
Product Specifications:
Impedance: | 20K ohm |
Capacity: | 15,000 pf |
Sensitivity: | 57 dB at 1KHz |
Frequency Range: | 200 ~ 8000 Hz |
Operation Temperature: | -20º to 60º Celsius |
Cord: | 3ft twisted cable |
Plug Type: | Mono |
Similar Products
- High-impedance Crystal Earphones
- Piezoelectric Headphones
- Sensitive Electroacoustic Earphones
- Crystal Radio Headphones
- High-sensitivity In-Ear Earphones
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
Perfect for those who need the most sensitive earphones available, such as those conducting science experiments or constructing crystal radios.

Crystal Radio Kit
Unleash the fascination of radio waves and electronics with the Crystal Radio Kit. This comprehensive kit is an excellent educational tool for students, offering them the opportunity to delve into the world of simple electronic components. By understanding the roles of diodes, capacitors, and inductors, students can build their own AM radio receiver that tunes into stations with precision. The kit's assembly process bridges theory and practice, providing a valuable learning experience. With the added benefit of a piezoelectric earphone, students can listen to their favorite AM stations, turning theory into an audible reality.
For a deeper grasp of the crystal radio's inner workings, students are encouraged to explore key topics including capacitors, inductors, diodes, antennas, LC oscillator circuits, and piezoelectric earphones. This knowledge empowers students to not only build the radio but also to understand how each component contributes to the overall functionality.
Key Features:
- Hands-on learning of radio electronics
- Build an AM radio receiver from scratch
- Understand diodes, capacitors, and inductors
- Tune into AM radio stations
- Piezoelectric earphone for audio output
Product Specifications:
Component | Details |
Dimensions | Varies based on kit components |
Included | 3 Eye Screws 1 Piezoelectric Earphone 1 Germanium Diode 27 AWG Magnet Wire 10 Wires with Alligator Clips Wire for Antenna and Ground Large Z shaped metal strip (150mm x 12mm) |
Assembly | DIY assembly required |
Similar Products:
- Electronic Learning Lab Kit
- Radio Frequency DIY Kit
- Electronics Basics Starter Kit
- DIY AM Radio Receiver
- Educational Electronics Experiment Set
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
Perfect for students, educators, and electronics enthusiasts seeking hands-on learning in radio technology. Tailored to beginners and intermediates looking to grasp the fundamentals of radio electronics.
Crystal Sound DIY AM Radio Kit
Dive into the fascinating world of electronics with the Crystal Sound DIY AM Radio Kit, an engaging project that demonstrates the power of radio wave energy. This comprehensive kit includes all the components you need to build a fully functional AM radio receiver powered solely by the energy of radio waves—no batteries required.
The kit features aluminum electrodes for a variable capacitor, enameled copper wire and a cylindrical container for an inductor, and a crystal earphone for clear audio output. Its laser-cut wooden structure ensures an easy and sturdy assembly process. Complete with an antenna, ground wires, and a rectification diode, the kit comes with a detailed assembly guide and troubleshooting tips.
Perfect for STEM education, science fairs, or personal exploration, this hands-on project highlights principles like resonance, electromagnetic induction, and energy conversion. Recommended for ages 10 and up, it offers an enriching experience for students, educators, and DIY enthusiasts alike.
Key Features
- DIY variable capacitor using aluminum electrodes and assembly materials.
- Inductor assembly with enameled copper wire and cylindrical container.
- Crystal earphone for clear audio output.
- Energy-efficient operation powered by radio waves—no batteries required.
- Laser-cut wooden structure for easy and sturdy assembly.
Product Specifications
Power Source | Radio waves (no batteries required) |
Included Components | 2 aluminum electrodes, 2 black wires, 2 red wires, 2 alligator clips (variable capacitor kit); 1 enameled copper wire, 1 cylindrical container (Inductor materials); 1 diode inside the cylindrical container; 1 antenna and ground wire; Crystal earphone (piezoelectric); Laser-cut wooden structure; Assembly guide. |
Learning Focus | STEM education, resonance, energy conversion |
Assembly Time | Approximately 2 hours |
Recommended Age | 10+ (adult supervision for younger users) |
Perfect for STEM students, educators, DIY enthusiasts, and history buffs.
Evaporating Basins (Crystallizing)
Evaporating Basins (Crystallizing) are essential equipment in laboratories and industrial settings for separating and purifying substances. These basins are designed to evaporate liquids and crystallize solids, making them ideal for a variety of applications such as chemical synthesis, pharmaceuticals, and food processing. Made from high-quality materials, these basins are durable, resistant to corrosion, and can withstand high temperatures. Whether you're a scientist or a manufacturer, Evaporating Basins (Crystallizing) are a must-have for any laboratory or production facility.
Product Specifications:
Product Name | Evaporating Basins (Crystallizing) |
Product Type | Basins, Evaporating, Crystallizing |
Application | Evaporating Basins (Crystallizing) |
Similar Products
- Crystallizing Dishes
- Evaporating Dishes
- Crystallization Plates
- Evaporation Plates
- Crystallizing Plates
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
Caution: The use of Evaporating Basins (Crystallizing) may pose hazards. Please refer to the safety guidelines before use.
Caution: The use of Evaporating Basins (Crystallizing) may pose hazards. Please refer to the safety guidelines before use.
Perfect For: Laboratory Technicians and Researchers
- Chemistry and Biology Laboratories
- Research and Development Facilities
- Pharmaceutical Companies
- Academic Institutions
- Industrial Testing Laboratories
- Chemical Manufacturing Plants
GR5 High Macro-Crystallinity Graphite Powder
GR5 is a premium natural flake graphite powder with a high degree of macro-crystallinity, boasting over 99% carbon content. Designed with flake-shaped particles, GR5 excels in thermal and electrical conductivity, making it ideal for various industries. It features low spring-back properties, enhancing its performance in applications such as molding and friction materials. GR5's versatility extends to powder metallurgy, batteries, fuel cells, refractories, lubricants, rubber compounds, pencils, gaskets, and polymer systems. Its purity ensures reliable performance across high-stress and specialized applications. Users are advised to handle with care and review the Material Safety Data Sheet (MSDS) for optimal use.
Key Features
- High macro-crystallinity ensures superior structural integrity
- 99% carbon content guarantees optimal purity
- Flake-shaped particles for easy application in manufacturing
- Exceptional thermal and electrical conductivity
- Low spring-back properties enhance performance in molding
- Versatile for multiple applications, including batteries, lubricants, and refractories
Product Specifications
Carbon Content | 99% |
Particle Shape | Flake |
Apparent Density | 0.25 g/cc |
CAS# Graphite | 7782-42-5 |
CAS# Carbon | 7740-44-0 |
SKU | GR5 |
Applications and Benefits:
- Powder metallurgy
- Batteries and fuel cells
- Refractories
- Lubricants
- Rubber compounds
- Pencils
- Gaskets
- Polymer systems
Caution:
Handle with care. The Material Safety Data Sheet (MSDS) must be reviewed for optimal use and safety precautions.
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