Abstract: A method and apparatus for making a flow determination with respect to a flow through a fluid conduit is described. The apparatus comprises a first temperature sensor arranged to generate a temperature signal indicative of the temperature of the outer surface of the fluid conduit, a second temperature sensor arranged to generate a temperature signal indicative of the ambient temperature outside of the fluid conduit; and a processor arranged to make the flow determination. The flow determination is made by determining the first and second temperatures at a first time; predicting a predicted first temperature at a second time; determining the first temperature at the second time; and comparing the predicted first temperature with the determined first temperature at the second time.

Abstract: The invention relates to devices for attaching a temperature sensor to a pipe, comprising a first and second jaw for contacting the pipe; and a head slidably mounted between the jaws and having a third engaging portion for contacting the pipe and for retaining a first temperature sensor, the head being moveable between a closed position and an open position, in which the third engaging portion is closer to the first and second jaws in the closed position than in the open position. The jaws are moveable between closed and open configurations, in which the jaws are closer to one another in the closed configuration than in the open configuration. Motion of the jaws and the head is coupled so that the open configuration of the jaws corresponds to the open position of the head and the closed configuration of the jaws corresponds to the closed position of the head. The device may be arranged to bias the first temperature sensor against the pipe in the closed configuration.

Abstract: A method and apparatus for making a flow determination with respect to a flow through a fluid conduit is described. The apparatus comprises a first temperature sensor arranged to generate a temperature signal indicative of the temperature of the outer surface of the fluid conduit, a second temperature sensor arranged to generate a temperature signal indicative of the ambient temperature outside of the fluid conduit; and a processor arranged to make the flow determination. The flow determination is made by determining the first and second temperatures at a first time; predicting a predicted first temperature at a second time; determining the first temperature at the second time; and comparing the predicted first temperature with the determined first temperature at the second time.

Abstract: An apparatus for making a flow determination with respect to a flow through a fluid conduit such as a domestic water pipe, the fluid conduit comprising a wall having an inner surface surrounding a flow space through which the fluid flows and an outer surface, the apparatus comprising: a first temperature sensor arranged to be mounted on the outer surface of the fluid conduit and arranged to generate a first temperature signal indicative of a first temperature being the temperature of the outer surface; a second temperature sensor arranged to be positioned spaced apart from the first temperature sensor and to generate a second temperature signal indicative of a second temperature being the ambient temperature outside of the fluid conduit; and a processor having inputs for the first and second temperature signals; in which the processor has an output for the flow determination and is arranged to make the flow determination by determining a measure of the convergence of the first and second temperatures over tim

Abstract: An apparatus for making a flow determination with respect to a flow through a fluid conduit such as a domestic water pipe, the fluid conduit comprising a wall having an inner surface surrounding a flow space through which the fluid flows and an outer surface, the apparatus comprising: a first temperature sensor arranged to be mounted on the outer surface of the fluid conduit and arranged to generate a first temperature signal indicative of a first temperature being the temperature of the outer surface; a second temperature sensor arranged to be positioned spaced apart from the first temperature sensor and to generate a second temperature signal indicative of a second temperature being the ambient temperature outside of the fluid conduit; and a processor having inputs for the first and second temperature signals; in which the processor has an output for the flow determination and is arranged to make the flow determination by determining a measure of the convergence of the first and second temperatures over tim

Abstract: An apparatus for making a flow determination with respect to a flow through a fluid conduit such as a domestic water pipe, the fluid conduit comprising a wall having an inner surface surrounding a flow space through which the fluid flows and an outer surface, the apparatus comprising: a first temperature sensor arranged to be mounted on the outer surface of the fluid conduit and arranged to generate a first temperature signal indicative of a first temperature being the temperature of the outer surface; a second temperature sensor arranged to be positioned spaced apart from the first temperature sensor and to generate a second temperature signal indicative of a second temperature being the ambient temperature outside of the fluid conduit; and a processor having inputs for the first and second temperature signals; in which the processor has an output for the flow determination and is arranged to make the flow determination by determining a measure of the convergence of the first and second temperatures over tim