![](https://swemed.co.uk/wp-content/uploads/2022/01/U21854_01_1200_1200_Electric-Doorbell-324x324.jpg)
Elektrisk dörrklocka (utbildningsprodukt)
Bell for demonstrating electro-magnetic operation of apparatus and verifying that sound waves sound waves do not propagate in a fine vacuum (< 1 hPa). Open acrylic housing with 4-mm safety sockets. Power supply: 6 V AC Dimensions: 100x95x50 mm³