What is the collective noun for campanologists?

There isn't a widely recognized collective noun specifically for campanologists (people who study and practice bell ringing).

However, you could use a general collective noun that fits the context, such as:

* A peal of campanologists (referring to the sound of bells)

* A band of campanologists (referring to a group of musicians)

* A society of campanologists (referring to an organization)

* A fellowship of campanologists (referring to a group united by a common interest)

Ultimately, the best choice depends on the specific situation and the intended meaning.