Slosh supressor and heat sink

The present invention relates generally to electronic devices having a circuit module which is covered by a layer of silicon gel for environmental protection, and more particularly relates to a mass flow air sensor utilized to measure the air intake of an automobile engine and the protection of the sensor's circuit module. A slosh suppressor prevents damage to electronic components and wire bonds of a circuit module contained in a circuit chamber formed by the housing of a sensor module. The circuit module is positioned within the circuit chamber and has a silicon gel layer positioned thereon for protecting the circuit module from the environment. A housing cover is structured to engage the sensor housing and close the circuit chamber. The housing cover has a projection extending into the circuit chamber and engaging the silicon gel layer to reduce vibration in the silicon gel layer and protect the circuit module.