Out of curiosity I had an idea what would be the purpose of using a pendulum over a sigil?
TO ask questions toward that specific demon sigil.
It might be a sigil he created and not one for a spirit. robofish sigils.
depends on the type of sigil as not all sigils are tied to an entity, but the general consensus is to have the entity answer yes or no questions.
I use my pendulum over angel sigils to ask If am receiving my meditation in a correct way.
so my pendulum usually turns like crazy to Show me that I am doing it right.
you can light a candle, create siğil and focus on it and ask your pendulum that if your siğil is accurate.
try to communicate with your pendulum Daily . that will increase your relationship with it
and when you have great energy with your pendulum
it will give you right answers.