Micro Automatic

The Reservoir Group Micro Automatic Gauge is a fully automatic gauge which requires no operator input to acquire data.

The gauge is supplied in monitor mode, a non-recording mode, where it is checking pressure and temperature readings every two minutes. When a user-programmed temperature or pressure threshold has been exceeded, the gauge automatically enters record mode and stores data to memory at a pre-set sample rate. At the end of a survey, the gauge stops recording automatically when pressure and temperature readings fall below the user-programmed threshold values. The gauge then reverts to monitor mode.

This low power gauge is designed for use on multiple runs using only a single AA size battery. A built in real time clock ensures accurate data is stored with real time values and the data from each survey is stored individually in its large memory for easy download and analysis. The Gauge is a compact 10.5” long and is available in 1.25” OD as standard or 1” OD for slim-hole and coiled tubing/small carrier applications.

Our Windows-based Memory Gauge software is easy to operate, even for the beginner, and simple communication steps to download data from the gauge will provide a graphical plot display. For the more advanced user, features such as plot manipulation tools, data export options and Gradient Survey/Report generation tools, are available.

  • Completely automatic, no operator input required to record data
  • All data is stored with real time values for easy analysis
  • 1,000,000 data set memory, where 1 second recording rate provides 11.5 days of data
  • Innovative electronics dramatically reduces power consumption
  • Long life ‘AA’ size battery is easier to ship since it is not classed as dangerous goods
  • Overall length of 10.5” makes Wireline rig-up easier and is ideal for carrier applications
  • Available in 1.25” or 1” OD
  • Casing leak detection
  • Frac monitoring
  • Gas lift mandrel
  • Gradient survey
  • Pressure build-up or draw-down tests
  • Production surveys
  • Reservoir evaluation, well testing & DST
  • Static, flowing and build-up surveys
  • Stimulation monitoring
  • Temperature logging



Maximum external pressure Must not exceed sensor range or 15 ksi Max
Sensor range 2 options, 8.6 ksi and 15 ksi
Sensor type Piezo-resistive
Accuracy ± 0.06% FSO
Accuracy typical
± 0.04% FSO
0.2 psi
Maximum temperature
Must not exceed 150°C
Operating range
0 to 150°C
± 1.0°C
Accuracy typical
± 0.5°C
Battery type
AA type lithium, hardwired
Operating voltage
3.6 to 3.9 V
Battery life*
Better than 1 Year
Sampling interval 1 to 600 seconds
Memory type Non-volitile
Capacity 1,000,000 data sets
Record contents
Real time, pressure, temperature
Diameter options 1.25"or 1"OD
Materials SS 17-4 PH, Sub K500 Monel
Standard or H2S