Resonant quartz memory pressure gauges have the highest resolution and operating temperature.

Resonant quartz crystal technology offers extreme long term stability. 
Quartz memory pressure gauges operate up to 200°C (400°F) making them the preferred choice for well montiroing high temperatures are expected.
Quartz memory gauges have the highest resolution of all downhole pressure sensors. 0.00006 % Full Scale. 

OD Maximum Temperature Maximum Pressure Battery Duration*
0.75" Quartz Memory Pressure Gauge

0.75" Quartz Memory Pressure Gauge

0.75" 200°C 25,000 psi 7 weeks
1.25" Quartz DXB Memory Pressure Gauge

1.25" Quartz DXB Memory Pressure Gauge

1.25" 200°C 30,000 psi 7.5 months
1.25" Quartz DXB II Memory Pressure Gauge

1.25" Quartz DXB II Memory Pressure Gauge

1.25" 200°C 20,000 psi 12 months
Quartz sensors are made from quartz crystals. Specifically, in DataCan gauges, there is a quartz disc placed between two quartz drums. The disc vibrates like a drum skin in response to changes in pressure and temperature which results in a change in the quartz disc’s natural frequency.
If you need a high temperature solution, you need quartz. Piezo sensors tend to drift at temperatures above 150 °C (the diffusion layer in the silicon die begins to leak resistance). Quartz tools will operate to temperatures around 200 °C, and the data will remain stable.
The transducer in DataCan's Quartz tools average 10,000 measurements every second resulting in higher resolution data that gives a clearer picture of what is happening in your specific well. It is 100 times more resolution than a piezo tool (0.00006% vs 0.0003% Full Scale).

  • Downhole pressure and temperature measurement
  • Pressure up to 30,000 psi maximum
  • Accuracy of up to +/- 0.020% full scale
  • Resolution of 0.00006% full scale
  • Temperature up to 200 °C maximum
  • Accuracy of +/-0.25 °C
  • Resolution 0.005 °C
  • 2 million data sets of memory
  • 1 second to once a day sampling

Quartz tools are more stable and have less drift than a Piezo tool. Typically you can go 2 years or more between  calibrations with a quartz tool. Quartz tools are preferred for long term high temperature jobs.

All of DataCan’s quartz tools use hybrid oscillating circuits. Hybrid circuits are 100 times more reliable than standard surface mount (soldered) electronics.

Hybrids, like the one above, have no plastic parts. The raw die is mounted onto a ceramic substrate. The resulting structure is much smaller, and will work reliably to higher temperatures (up to 225°C).

A modular memory cartage means that DataCan’s quartz tools can be upgraded in the field. At any time, a DataCan customer can change the memory module out for a surface readout module.

DataCan Quartz tools have significant advantages over the competition. DataCan’s quartz design maximizes the thermal response of the quartz sensor. The picture below shows the caged bullnose that DataCan uses to expose the pressure (green) and temperature (red) crystals to the wellbore.

DataCan’s mechanical package uses electron beam welding to reduce leak paths. DataCan has one tool joint, the competitions’ tools have up to three. As well as reducing the number of potential leak paths, DataCan has improved their seal joint. A common seal failure is extrusion. DataCan’s seal design uses a metal to metal beveled seal to eliminate the extrusion gap.