Field Data Logger & Controller-Top 5 Specs

Sigra’s broadly applicable Field Data Logger technology is ideal for monitoring landslide, ground anchor, stress change, aquifer pressure, petroleum reservoir monitoring, and much more.   


1. Plenty of Storage

The Sigra Data Logger V9 comes with a 4 GB micro-SD card built-in to permit lifetime storage.

2. Improved Resolution

By storing the records in a 32-bit floating point format, improved resolution of 0.001 Hz is available for Vibrating Wires without affecting coefficients for previously installed transducers. This allows seamless upgrade of existing Vibrating Wire installations for improved resolution.

For Vibrating Wires used in surface applications (strain gauge, shallow piezos etc.), the temperature drift will be significant at these resolutions.

3. Stable Clocks

The internal clock chip with a built-in crystal oscillator has a time drift of less than 2 minutes a year across the full operating temperature range. Less than 20 seconds of drift is achievable if maintained between 10 and 40 degrees Celsius.

4. Low Voltage Disconnect

The V9 Data Logger (IP65 version) now has a built-in Low Voltage Disconnect (LVD) to protect the batteries from extreme discharge. This prevents the early failure of cells.

5. Alarms

The loggers have an alarm capability that permits them to detect when a value exceeds a threshold value, rate or both. The logger can then send a warning via SMS message (requires a 3G modem), trigger an output and store the alarm as a flag when downloaded. Alarms are sent through the local logger network to permit warning devices across the site to be activated.

To find out more, contact us, or read more here.

Author: Ian Gray
Ian initially worked in Australia supervising the installation of the first gas drainage system at Central Colliery and then went on to work as Senior Geotechnical engineer building a mining wing to the consulting company DJ Douglas and Partners. In 1990 he became Principal Engineer, Mining Research with the Safety In Mines Testing and Resarch Station of the Department of Resource Industries of the Queensland Government. In this role he worked on frictional ignitions, mine explosions, windblasts, gas drainage and directional drilling including the first surface to in-seam operation in the country in 1991. In 1994 he started Sigra as a one man business. Since then the company has grown under his guidance to span mining, gas, civil, geotechnical work and a number of mechanical and electronic product developments.