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The oil and gas industry is filled with incredibly sensitive processes that require industry-leading instrumentation to ensure the integrity of data measurement and workplace safety. This is especially true of the pressure sensors being used in oil and gas applications like fracking and offshore drilling can commonly see pressure ranges above 15,000 PSI, which means specialized pressure transmitters are needed. Not only do pressure transmitters for oil and gas drilling need to have high pressure ranges, but they need to be tough enough to withstand the vibration and rough handling in the field.

There are features to look for in pressure sensors that can help meet the demands of this industry. This blog post will address a few of those important features. We hope it is useful for those in the oil and gas industry looking for pressure transmitters to help with:

Fracking

Acidizing

Mudlogging

Offshore drilling

High Accuracy at High Pressure Ranges

Oil and gas processes typically use hammer or wing unions to make tight connections between sections of pipe. Manufacturers make pressure sensors for these applications with special hammer union fittings, known as Hammer Union Pressure Transmitters. They take great pride in their sourcing, product development, and product performance that can withstand the demands of the oil and gas industry. 

As mentioned above, it is quite common for processes to see pressure ranges above 15,000 PSI. Manufacturers of most hammer union pressure transmitters make their sensors to withstand pressures up to 20,000 PSI. Accuracy is also a significant factor in choosing the right pressure sensor. Depending on the process being measured, fractions of a percent can make a huge difference in catching potential issues. For example, the Druck PTX661 Pressure Transmitter has 0.1% full-scale accuracy for pressure ranges up to 15,000 PSI. The APG 1502I HU Hammer Union Pressure Transmitter has 0.25% full-scale accuracy for pressure ranges up to 20,000 PSI. Maintaining this full-scale accuracy even into ultra high pressure ranges is what sets hammer union pressure transmitters apart from the competition. It allows operators to make any changes to the process when needed, preventing work stoppages or equipment breakdowns.

Rugged, Dependable Designs

The process media for oil and gas applications can be highly abrasive and corrosive. Pressure transmitters need to be able to maintain their performance despite these conditions. Part of the way they are able to achieve this consistency is how they are designed. Imagine a pressure sensor that has parts that are bolted together. Under high pressure and dealing with corrosive liquids, they could split and become pressurized projectiles instead. 

What’s commonly used for wetted materials of the transmitter are extremely durable alloy metals such as Hastelloy C22 or nickel alloy. These materials are able to withstand the highly abrasive and corrosive materials and often come with industry approvals so the operators can be confident their pressure transmitter can withstand harsh sour gases.

These high-end pressure transmitters are designed to be as precise and fast as possible so that operators can make important, real-time decisions in the field. Part of this precision comes from the impact of drift, hysteresis, and response time. Make sure to check your manufacturer’s specifications so that your pressure transmitters are doing the job they need to. For example, the ScanSense Wing Union Pressure Transmitter has a < 2 millisecond response time, < +/- 0.05% FS hysteresis, and < +/- 0.1% FS/year drift.

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