Tiltmeters . Pendulums
GeoNet Wireless Mesh Tilt Loggers
The 8800 and 8900 Series Mesh Tilt Loggers combine the capabilities of a biaxial tiltmeter with a wireless GeoNet Mesh Logger. The self-contained tilt loggers are attached to various structures including dams, embankments, foundation walls, retaining walls, buildings, etc., and provide wireless measurement of any tilting that may occur. Remote access of sensor data is achieved via the Cellular Gateway,¹ which controls the mesh network and collects sensor data from any tilt loggers deployed. A Local Gateway, without cellular capabilities or cloud integration, provides the same control over the network to allow secure, localized access to your sensor data.
Seamless and secure cloud integration is achieved with GEOKON OpenAPI. The GEOKON OpenAPI portal is easy-to-use and allows users to activate loggers, change settings, configure sensor channels, and view current logger status. Industry leading data visualization software, or the no-cost GEOKON Agent Software, can be used with GEOKON OpenAPI for data viewing and reporting.
| Specifications | |
|---|---|
| Topology | Star/Mesh/Cluster Tree (Automatic) |
| Radio Frequency, ISM Band | 902-928 MHz (North America) 902-906, 915-928 MHz (Brazil) 915-928 MHz (Australia, Chile, Peru) 863-870 MHz (Europe) |
| Range¹ | 8900 | Up to 60 km (15 km × 4 hops) (North America, Brazil) 8900 | Up to 22 km (5.5 km × 4 hops) (Europe) 8800 | Up to 26 km (6.5 km × 4 hops) (all models) |
| Tilt Range² | ±90° |
| Resolution³ | 0.00025° (0.004 mm/m) |
| Precision⁴ | ±0.0075° (±0.13 mm/m) |
| Data Memory | 32 MB |
| Storage Capacity | 500,000 readings |
| Power Supply | D Cell, Alkaline or Lithium (2×), or 12V External |
| Operating Temperature | −40 °C to +65 °C (−40 °F to +149 °F) (range varies by power source) |
| L × W × H | 120 × 122 × 91 mm |
¹Outdoor, clear line-of-sight, maximum 4 hops.
²Calibrated range: ±30°
³99% confidence interval (i.e. 99 out of 100 individual readings fall within this tolerance).
⁴99% confidence interval. Includes random walk (changes between consecutive readings that have no discernible cause) and seismic noise during testing.