Our church bell ringing system is controlled using a GPS synced master controller with programmed times for Mass, Angelus & Funeral Toll. When the GPS reaches the chosen time, power is sent to a relay switch that turns on the Electromagnet Bell Hammer which strikes the bell. The Bell Hammer strikes the bell accordingly, eg: For the 6pm Angelus, the hammer would strike the bell 3 by 3 then 9. The system can also be manually rung for special occasions.
For an accurate quote, please measure the diameter of your bell. Every electromagnetic hammer is different depending on size of bells.