April 2015


Hydrogen Resistant Bellows (H2x)
2015 Field Reliability Update
2015 Powered Life Update
Drift Study Update
New Paper: Calibration Uncertainties
Visit Quartzdyne at OTC 2015, May 5-8
Presenting at Sensors Expo & Conference
Message from the President


Hydrogen Resistant bellows (H2x)


For nearly a year now Quartzdyne has given extensive attention to the customer-reported problem of Hydrogen migration through Inconel bellows. The problem resulting from hydrogen ingress, ultimately, is a calibration shift after the gauge is removed from the well at atmospheric pressure.  The new hydrogen-resistant (H2x) bellows renders an Inconel bellows significantly resistant to hydrogen ingress. Complete prevention of hydrogen ingress may not be realistic; however, the data presented demonstrates the H2x bellows exhibited no appreciable hydrogen ingress, i.e. extension, even after two weeks of exposure to a hydrogen-rich environment. The test development to substantiate the results is also explained. Field testing is underway with the assistance of Quartzdyne customers.

Click here to view the Full Report

2015 Field Reliability Report 

We track our field reliability by recording failure modes and year shipped for each returned transducer. Each year we analyze the findings for trends, and share the results openly on our webpage. This report describes the general design of a Quartzdyne pressure transducer, and provides the reliability statistics and common failure modes for each of the major components.

Click here to view the full report.

2015 Powered Life Update

Powered Life test is designed to move one step closer to the end-use environment. Fully assembled transducers, composed of circuits, crystals, and mechanical interconnects are placed into ovens as hot as 250°C and continuously powered until failure occurs. Transducers are monitored daily using automated equipment. When failures occur, they are removed from test and diagnosed to determine root cause.

Click here to view the update.

Additionally, we have developed an alternative to soldering that significantly improves our interconnect failure category.  We are excited to begin offering welded wires as an improvement and will be discussing the update further in the next newsletter.  Feel to contact us if you would like more information about our plans and the results from our initial testing.  

Drift Study Update

In the past, Quartzdyne has published drift characteristics quantified at the maximum rated pressure and temperature for each transducer type. In response to customer requests, Quartzdyne staff has developed a more precise understanding of the pressure drift observed at intermediate operating pressures and temperatures. The table below summarizes the results of the experiments completed thus far.  

Average 1-year Projected Pressure Drift (%FS)

Quartzdyne Drift Study Update

New Paper: Calibration Uncertainties

This report summarizes the method of calibration used to characterize Quartzdyne® Pressure Transducers and provides the sources of metrology uncertainty, including the mitigating procedures to manage and control those uncertainties.

Click here to view the presentation.

Visit Quartzdyne at OTC 2015, May 4-7

We invite you to visit Quartzdyne in booth 3126 during the Offshore Technology Conference and Exhibition in Houston. Please contact us at sales@quartzdyne.com if you would like a complimentary one-day pass. We look forward to seeing you there!


Presenting at Sensors Expo & Conference

Dr. Rick Puccio, our Sr. Staff Scientist will be presenting at the Sensors Expo & Conference in Long Beach, CA.
Dr. Puccio's session discusses long-term drift limitations of current pressure sensing technologies and demonstrates how these limitations are important, yet are underrepresented in the metrology industry. Attendees will understand the value of sensor stability and how long-term drift is more important than high accuracy, and certainly harder to achieve.  His paper will demonstrate how temperature plays a dominant role in long-term drift in MEMS pressure sensors, and why specifications often don't tell the whole story. 

Message from the President

The philosopher Heraclitus penned, “Nothing endures but change.”  In my 22 years in this industry, I’ve observed four market cycles that significantly impacted our revenues in 1999, 2003, 2009, and 2015.  From my standpoint, this recent cycle has been different and tougher than all prior cycles.  The sheer speed of spending cutbacks during this period indicates that the oilpatch supply chain has become much more efficient.  In prior cycles, we observed customers continuing to purchase to a planned budget, which ultimately delayed the recovery.  While present low demand levels have negatively impacted many individuals and families worldwide, less inventory in the overall system suggests that demand generation—when it occurs—will happen more timely.  And that’s a good change in our industry, with assuredly more improvements to come.

At Quartzdyne we have restructured twice, dropping our employee count to 75 employees.  (Less than a year ago, we were 107!)  Although we have 30% fewer staff today, I assure our customers that we remain committed to manufacturing high-reliability products.  We will not ship a product that does not reflect the Quartzdyne brand promise.  We continue to invest in core product improvements, as well as developing exciting new products and technologies that will make service companies (and by extension, their customers the operators) more productive.

I thank our employees—past and present—for their dedicated work in helping our customers win.

— Lon Perry, P.E.