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Downhole pressure is a key variable in the operation of oil wells. Drilling operators need to measure pressure and temperature to optimise drilling processes and ensure safety. Once drilling is complete and production begins, these measurements are then required to optimise throughput, maximise uptime and again, ensure safety. Downhole pressure measurement requires rugged components with increased pressures and temperatures as holes become deeper. Maintaining and replacing downhole sensors is a challenging task so high reliability is paramount. Space is also at a premium in narrow boreholes.


Over the years, ESI Technology Ltd has honed the skill and expertise to engineer exacting pressure measurement solutions for many oil, gas and subsea applications. The ability to meet the stringent requirements for these markets can be illustrated by the evolution of the field proven oil, gas and subsea product range which includes dual redundant and subsea differential designs, and the recent introduction of HI5000 miniature downhole sensor.

The HI5000 has been specifically designed for extreme downhole high cycle, high pressure and temperature applications which require accuracy, stability and long term performance of downhole pressure monitoring.


With a maximum length of 58mm and slim diameter of less than 13mm, the HI5000 is highly compact and saves on critical downhole tool space. Downhole sensor applications require wetted parts made from materials approved to NACE Standards, therefore the housing is made from tough, corrosion resistant Titanium Alloy and approved to NACE Sour Service MR0175-9. The fully welded, sealed construction provides durability, resilience and stability in harsh and corrosive conditions.


At the heart of the design is ESI’s unique Silicon-on-Sapphire sensor technology; a sensor not only with high sensitivity and stability but also rugged and resilient against high overload pressures and transients. With pressure ranges up to 1500 bar, and up to 3x overpressures in some ranges, the sensor is designed to withstand high shock and vibration inputs in high temperatures up to 200°C.


Document packages have become a standard requirement in the competitive oil and gas market and ESI are ready to support any requirements for this. The provision of documentation to support products is usually beyond the scope of most quality systems, but ESI has adapted procedures to offer full and comprehensive document support including certificates of conformity, calibration certificates and material certificates for traceability.


• Pressure Ranges: 0-400 bar, 0-600 bar, 0-1000 bar, 0-1500 bar Sealed Gauge

• Excitation: 3 to 10VDC, 5VDC nominal

• Output full-scale sensitivity: 10 to 20 mV/V

• Operating temperature range: -40°C to +200°C

• Nonlinearity and hysteresis combined: 0.15 % of span max. BFSL

• Total error band: < ±0.2% of span using polynomial model P(T, mV), compensated 20°C to 180°C

• PT1000 RTD: IEC 60751 CLASS A

• Housing is all Titanium Alloy, NACE Sour Service Approved MR0175-9

• Weight: 20 grams WANT TO KNOW MORE? For more information on our range please contact:

+44 (0)1978 262255

Or visit our website:

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