CS-DHP, Downhole Pressure Sensor

The CS-DHP Downhole Pressure Sensor uses a fully active four arm Wheatstone bridge, dielectrically isolated Silicon on Sapphire sensing element based on proprietary technology. This sensor, from Core Sensors, is able to withstand the high pressure, high temperature environments that are common in downhole oil and gas exploration. The compact design of this pressure sensor allows for installation in downhole tools without sacrificing space. Standard offering includes a 3/8″-24 UNF-2A process connection, uncompensated millivolt output signal, 12.5 mm diameter housing, and solder hooks. Integral high temperature cable can be added upon request.

• pressure from 5,000 to 30,000 PSI
• operating temperature from -319 to 399˚F (-195 to 204˚C)
• high strength titanium BT9 sensing element
• ≤ ±0.15% BFSL accuracy
• optional PT1000 temperature output

Compact Pressure Sensor for Downhole Pressure Monitoring

The CS-DHP Downhole Pressure Sensor offers a typical full scale output of 125mV when using a 10VDC excitation. This provides a large amount of usable output, simplifying signal conditioning. An optional PT1000 temperature output is available for applications where a reference temperature measurement is beneficial.

All of these features come in a small, compact package with a typical diameter of 12.5mm. The CS-DHP comes standard without a hex on the front end of the sensor (near the process connection threads) to ensure fitment in drilling tools with confined spaces. A hex comes standard on the back end of the sensor (near the electrical termination points) which can be used during installation.

Performance

• accuracy @ 77°F (25˚C)*: ≤ ± 0.15% BFSL
• stability (1 year): ≤ ± 0.25% of FS
• over-pressure: 1.5X rated pressure
• burst pressure: 2X rated pressure

*Accuracy includes non-linearity, hysteresis, and non-repeatability.

Thermal

• operating temperature: -319 to 399˚F (-195 to 204°C)
• TC zero: 0.025% FS per °C, typical
• TC span: 0.05% FS per °C, typical

Environmental

• MI/RFI protection: No
• vibration: 10 g, 10 to 1000Hz
• shock: 100 g, 11 msec, 1/2 sine

Electrical (Millivolt)

• outputs: Millivolt uncompensated
• excitation*: 10VDC, typical; 12VDC, max
• full scale output @ 10 VDC: 100mV, minimum; 125mV, typical; 200mV, max
• isolation voltage: 500VDC
• input & output impedance: 3.5KΩ, typical
• response time: 0.1ms, typical; 0.2ms, max
• zero offset (of FS): ≤ ± 5%

*Sensor will operate off of any voltage up to 12VDC. Output is ratiometric to supply voltage used.

Safety Notice

Disclaimer: Unless otherwise agreed in writing, Core Sensors products are not authorized for use in applications including medical devices, life support systems, in-flight aerospace, nuclear, or any other application where the product failure could result in personal injury or death.

Applications for the CS-DHP Downhole Pressure Sensor

• measurement while drilling (MWD)
• logging while drilling (LWD)
• oil and gas exploration
• wellhead measurements

Model Line-Up

Not all configurations are available. Our team can recommend the closest available configuration based on your requirements. Contact us for configurations not shown.

Model Configuration Example

CSDHP-AE20000PSAA000 = (3/8-24 UNF Male w/ 74° cone, Titanium BT9, 0-20,000 PSI sealed gauge, mV, Solder hooks)

Equivalent to Emerson Paine 220-11-0010