Preliminary evaluation of a high-pressure, high-temperature downhole optical sensor

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4 Citations (Scopus)


This paper reports on the evaluation of a high-pressure high-temperature (HPHT) sensor prototype for permanent monitoring of pressure and temperature in oil wells. A Fabry-Perot (FP) pressure transducer was built using a metal capillary, metal reflecting wire and metal coated fiber which were brazed with a silver-based brazing paste using a specially designed induction heating system. The prototype sensor was tested for two outermost temperatures of the operating range of 20-350°C for which wavelength-pressure response characteristics were recorded for incremental pressure changes from 0 to 10,000psi. The results show that the sensor response to pressure was linear, with the nonlinearity error below 1%.
Original languageEnglish
Title of host publicationProceedings of the 2011 IEEE Sensors Conference
Place of PublicationNew York
Number of pages4
ISBN (Print)9781424492909
Publication statusPublished - 28 Oct 2011
EventSensors, 2011 IEEE - Limerick, Ireland
Duration: 28 Oct 201131 Oct 2011


ConferenceSensors, 2011 IEEE


  • optical sensor
  • high-pressure high-temperature
  • sensor prototype
  • sensor
  • optical fiber sensors
  • transducers
  • temperature sensors
  • temperature measurement
  • temperature
  • prototypes
  • preliminary evaluation
  • high-pressure
  • high-temperature
  • downhole optical sensor


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