The invention describes a vibrating element apparatus, preferably in the form of a tuning fork-type contact level transducer, and a method of forming the same. The tines of the transducer are vibrated by piezoelectric elements, which piezoelectric elements are arranged in a stack along with insulators and conductors to allow cyclic electrical signals to be applied thereto. The stack is provided as a sub-assembly allowing ready replacement in the field and 10 without disturbing the installation of the transducer in the plant which it serves.