ABSTRACT
This chapter describes the main applications of distributed temperature sensors (DTSs). The initial motivation for DTS came from the need to monitor large electrical transformers. The application of DTS to transformer design verification was pioneered by ABB, who mastered the means of introducing optical fibres within the transformer windings. The use of DTS for fire detection was explored soon after commercial systems became available. The DTS metrology for the fire detection application therefore requires fast but low-noise measurement in order to meet the time-to-alarm required in the industry standards. The oil and gas extraction industry is one of the key sectors applying DTS technology; many applications exist for temperature profiles, and some will be described. The foregoing has discussed mainly the permanent deployment of fibre; however, many of the DTS measurements are now performed using temporary deployments with fibre-enabled Coiled tubing (CT) or slickline.
