The TORNADO25 silicon-sapphire electronic downhole memory gauge is designed to be run by Wireline and/or Service personnel. There is no need for extensive knowledge and experience in running memory gauges, thanks to TORNADO’ easy to use software. The gauge doesn’t need to be reprogrammed after every run as long as you are using the same sample rate. The software also allows you to download and generate a report or ASCII file for emailing with ease.
Applications
Pressure Build-up Tests
Production Tests
Pressure Gradients
Post Stimulation Evaluation
Interference Tests
Fracture Monitoring
Injection Pressure Monitoring
Coil Tubing Operation

Specifications
Sensor Type Silicon-Sapphire
Service H2S Services
Metrology–Pressure
Drift–psi/yr <3
Accuracy–psi full scale ± 0.03%
Resolution–psi 0.0003%
Range–psi Up to 20 kpsi
Metrology–Temperature
Rating–°C 125 (257 °F), 150 (302 °F), 177 (351 °F)
Accuracy–°C ± 0.5
Resolution–°C 0.01
Characteristics
Power Source One AA or C lithium pack
Communication USB/RS232
Data Set Time/Pressure/Temperature
Max Outside Diameter–inches 0.75 (19-mm)/ 1.0 (25-mm)/1.25 (32-mm)
Overall Length–inches 9 (229-mm)/11 (279-mm)
Housing Material Inconel 718/Stainless Steel 17-4
Sampling Rate 1 sec to 18 hours per sample
Memory Capacity 2,000,000 data sets standard