Abstract: It is provided aA method for estimating the presence of rain characterized by comprising including the steps of entering a set of static parameters, entering a set of dynamic parameters, measuring an instant value, sending said the values to a first Kalman filter and to a second Kalman filter and define defining the start of a precipitative event if a difference between said the KalmanST output and said the KalmanFT output exceeds said the “epsilonStart” threshold value and also define the term of a precipitative event if a difference between said the KalmanST output said the said KalmanFT output is lower than said the “epsilonStop” threshold value.

Abstract: A gas conveyor oven has a conveyor belt for conveying an item through a heating chamber in which separate parts or sides of the item are to be concurrently heated at different temperatures. A blower draws heated air from a gas burner into a ventilation chamber in which a first baffle directs a first fraction of the heated air from the blower into a first portion of the heating chamber; and a second baffle directs a second fraction of the heated air from the blower into a second portion of the heating chamber. The second fraction of the heated air has a different rate of flow than the first portion, because the first and second baffles are positioned asymmetrically with respect to the heater, so that the fraction of air deflected by each baffle onto a different part or side of the item differs in volume and flow rate.