Abstract: In one aspect, a tire monitoring apparatus having a circuit board, battery, and valve body intermediate the circuit board and the battery. The valve body has an attachment end portion for connecting to a valve stem of a tire, a filling end portion, and an internal passageway to permit air to travel from the filling end portion to the attachment end portion. The circuit board has a sensor configured to detect a variable of air traveling in the internal passageway of the valve body and communication circuitry of the circuit board operable to wirelessly communicate data associated with the variable of the air. The tire monitoring apparatus further includes a support permanently encapsulating the circuit board and battery about the valve body. The support includes a structural member molded onto the valve body and an embedding member securing the circuit board and the battery to the structural member.