Quick Answer: The Bell Demonstration Model is an open-frame electric bell that runs on 3 V to 6 V DC, letting students watch copper-wound solenoids and a contact breaker strike a steel gong.
Last updated: October 2026
Key Features
Open frame so the solenoids, armature and gong are all visible
Insulated phenolic base with 4 mm terminals; works on 3 V to 6 V DC
Technical Specifications
Specification
Value
Input
3 V to 6 V DC
Coils
Copper-wound solenoids
Gong
Painted carbon steel
Contact breaker
Adjustable, spring-loaded, platinum/brass
Base
Insulated phenolic, non-slip, with 4 mm terminals
HS code
9023.00.00
About This Product
When current flows the electromagnet pulls the armature so the hammer hits the gong, which breaks the circuit and lets the spring pull it back, and the cycle repeats. The model makes this make-and-break action easy to follow in lessons on electromagnetism and energy conversion. Educational Instrument can arrange export supply of the Bell Demonstration Model to Samoa, Dominican Republic, Iceland, Senegal, Lesotho and Honduras.
Frequently Asked Questions
What power supply does the Bell Demonstration Model need?
It runs on 3 V to 6 V DC and connects through 4 mm terminals on the base.
