A vibratory apparatus includes a deck, an electro-mechanical sensor and at least one vibratory exciter. The deck has an upper surface configured to receive items to be conveyed in at least a first direction along a longitudinal axis from a first deck end to a second deck end. The electro-mechanical sensor includes a wheel disposed above the upper surface of the deck, the wheel being rotatable about a wheel axis disposed transverse to the longitudinal axis, and an electronic sensor associated with the wheel, the electronic sensor configured to generate a signal representative of the revolutions per unit time of the wheel. The at least one vibratory exciter is attached to the deck and is configured to move the material along the deck.