They ring bells, yo.
The plural of campanologist would be campanologists.
One who rings bells in company with other people, usually in churches. See the "Related Link" below. It gives a really great overview.
ferroequinologist (fr ferro "iron" + equinus"horse"). One who studies the iron horse or railroad industry: Railfan. You can find reference to this word in Webster's Third New International Dictionary. If you want to sound smart you could say that one who FEARS trains is a ferroequinophobe.+++You're unlikely to find grandiloquent words like "ferroequinologist" in railway-enthusiasts' literature though! They are just railway [~road] enthusiasts. (Any more than bell-ringers call themselves "campanologists".)
Ah, a bell ringer is often referred to as a campanologist. It's a lovely word that captures the art and joy of ringing bells. Just like painting happy little trees, being a campanologist brings a sense of peace and harmony to those who hear the beautiful chimes.
bellringer, toller, carillonneur, chimer, signaller, tower captain, sextonAnswerbellringer, toller, carillonneur, chimer, signaller, tower captain, sexton ___________________Nobody came up with 'campanologist'!. Most churches only have 'tolling' bells that just swing back and forth, or carillions, which are operated with wires and hammers. A full peal of bells is much more complex and and is found in many older churches and cathedrals in the UK and Ireland. A ringing bell can be paused at the top of its swing, which goes more than 360 degrees, allowing for complex patterns and sequences. Bells are controlled and timed by trained bell ringers, campanologists. A bell tower is called a 'campanile', such as the famous one in Trinity College Dublin, although that just has a mechanical bell. St Patrick's Cathedral in Dublin (Anglican) has a very large peal of bells, and the sound of bells on great occasions is a wonderful experience.