Sensor, controller and system

Abstract Sensor, controller and system 5 The present invention relates to a sensor 104 for measuring temperature of a fluid within a vessel 106, the vessel 106 having a first region and a second region and the fluid having a temperature profile extending between the first region and the second region, the sensor 104 comprising an array of elements 300, each element 300 having a temperature-dependent parameter, the array being capable of 0 deployment within or adjacent the vessel 106 such that the array extends along the vessel 106 for measuring the temperature profile, the elements 300 of the array being coupled together between an input and an output, the input being coupled or capable of being coupled to a driving source for driving the sensors 104, and the output being coupled or capable of being coupled to a detector for measuring an 5 aggregate of the temperature-dependent parameter from the array of elements 300. The invention further relates to a fluid temperature controller 100 comprising a first input for receiving a first signal 102 indicating a measurement of an aggregate of a temperature-dependent parameter from a sensor according to any preceding claim deployed within or adjacent a vessel containing a fluid having a temperature profile, o a second input 108 for receiving a second signal indicating a (preferably absolute) temperature of the fluid in the vessel 106 and a processor 110 configured to calculate a total thermal energy of the fluid in the vessel 106 based on the first and second signals. The invention also relates to a combination comprising a sensing arrangement and a controller; a device; and a system. WO 2014/087162 PCTICB2OI3/053208 Co -- rJ r'J 'H to o C -1 C) L. Un UeN - I - I I r4 I, - I - __ II ______ I I Ii - II eN Ii 'H