Abstract: An operative temperature sensing system including an air temperature sensor, a globe-type temperature sensor and a circuit for modifying the air temperature signal and the globe temperature signal by predetermined factors whereby the modified signals are combined to generate a signal that is a function of operative temperature.

Abstract: Cold weather operation of a heat exchanger which utilizes ambient air to cool a process stream containing water is monitored by a series of thermocouples placed in the heat exchanger tubes subjected to the coldest air. A scanner monitors the thermocouples and alerts operators to unsafe or potentially freezing temperature conditions in the tubes.

Abstract: The invention provides a method and apparatus for determining the approximate temperature profile of a large curved surface such as the outer surface of a chemical or hydrocarbon conversion reactor. At least two arrays of wire having a temperature dependent electrical resistance are placed over the surface to be monitored, with the arrays being aligned in different directions to cover the surface with a grid of overlapping wires. By measuring the resistance of each wire and comparing this resistance to predetermine reference values, wires which pass through regions of elevated temperature compared to the remainder of the surface may be located. By attributing the elevated temperatures to the area covered by the intersecting wires which show an increased resistance the areas of high temperature on the surface may be located.

Abstract: A device for continually sensing the temperature of an advancing glass ribbon has a thermocouple temperature sensing junction mounted within the area circumscribed by a pair of rotating wheels and spaced from the periphery of the wheels. The wheels engage the ribbon and are rotated thereby as the temperature sensing junction remains in a fixed position in a plane containing the rotating axis of the wheels and normal to the glass surface to continually sense the temperature of the advancing ribbon.