Distributed Pressure and Temperature Sensing System

Smart Fibre' Distributed Pressure and Temperature Sensing System, or DPTS, is a novel, low-cost technology solution for permanent, downhole pressure and temperature measurements in the oil & gas industry. Our DPTS technology is comprised of a string of optical SmartPort pressure/temperature gauges, downhole optical cable, SmartPB surface pressure barrier, Wellhead SmartScope surface instrumentation and SmartSoft application software.

Potential applications of DPTS include:

  • real-time fluid level measurement to aid intelligent reservoir production
  • multi-zone production pressure and temperature monitoring for improved recovery, optimized well performance and enhanced control of different zones
  • fluid off-take monitoring in artificial lift wells to prevent pump damage
  • high pressure, high temperature well monitoring
  • inflow profiling in production and injection wells
  • kick detection for advanced well control


  See our DPTS Brochure

  • No downhole electronics
  • Long-term stable operation in harsh well environment
  • Immune to electromagnetic interference
  • Real-time permanent pressure and temperature
  • Tubing and annulus pressure options

Related items

Wellhead SmartScope

Wellhead SmartScope





SmartPB for downhole well integrity


Smart News, October 2015

Smart News | October 2015. Oilfield System Commercialisation



Related FAQs

FAQ. Is the SmartPort compliant to API or any other standards?

SmartPort is constructed of Inconel 718 and fully compliant with NACE MR0175.

FAQ. Does the SmartPort pressure rating influence the selling price?

No, all pressure variants are the same price.

FAQ. Does Smart Fibres technology suffer the effects of hydrogen darkening in downhole applications?

No, Smart Fibres technology is based on measuring the frequency of the reflection from fibre Bragg grating sensors. When there is attenuation in an optical fibre (whether through hydrogen darkening, poor connectors, fibre bending or any other effect) there is no change in the frequency of the light that passes through it. That means the signal of the Smart Fibres technology is not affected. Indeed, Smart Fibres interrogators are designed to compensate for attenuation in the fibre by automatically applying gain of up to 27 dB, individually on the reflection of each FBG within the system. So, for a Smart Fibres system, as long as the light gets through the data quality is maintained.

Hydrogen darkening and other means of attenuation mainly affect distributed temperature and strain systems based on measuring the amplitude of Raman or Brillouin backscattered light. Here, any change in amplitude can have a significant impact in the measurement quality. A simple comparison is frequency modulation (FM) vs. amplitude modulation (AM) in radio communications.

FAQ. Can the SmartPort be used for sensing either tubing or annulus pressure?

Yes, for tubing pressure the SmartPort can be mounted onto a gauge carrier mandrel and the interface sealed with dual metal-to-metal C-ring seals. For Annulus pressure the SmartPort can be clamped to the tubing string using standard off the shelf clamping solutions or mounted in a mandrel with the pressure inlet port facing outwards.

FAQ. Is the SmartPort supplied with one or two fibres?

The SmartPort is supplied with two polyimide coated fibres; one for the pressure sensor and one for the temperature sensor.

FAQ. Does Smart Fibres offer field installation services?

Yes, our highly experienced team of field installation engineers can be mobilized to install our systems or sensors anywhere around the globe.

For more information please Email Us or call +44 1344 484111.

FAQ. How do I calculate which wavelength to use for my FBGs to maximise the number of sensors on a particular channel?

Smart Fibres has created a wavelength budget calculation tool for FBG wavelength selection.

Please Email Us or call +44 1344 484111 with details of your application and we can help you create a wavelength budget.