GEOSTRING In-Place MEMS Inclinometer
GEOSTRING is an in-place MEMS inclinometer system that continuously measures subsurface tilt along a chain of sensors inside a casing, giving real-time, single-cable monitoring of ground and structure movement.
- Range
- ±30° from vertical, -10°C to +40°C
- Ingress
- Waterproof to 2 MPa (300 psi)
- Supply
- 10-30 Vdc; RS485 digital signal (requires Campbell Scientific data logger)
Overview
In detail
Deployment
Key features include easy installation, real-time monitoring and a single cable run to the datalogger; sensorless nodes are available where a location doesn't need a live tilt reading, and the components are built for long-term reliability in the field.
Applications
Typical uses include slope stability and early warning of failure, monitoring the performance of dams and embankments, tracking ground movement from tunnelling, deformation of retaining walls, and general landslide monitoring.
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Specifications
Technical specifications
- Sensor type
- MEMS tilt sensors for inclination; thermistor for temperature
- Range
- ±30° from vertical, -10°C to +40°C
- Resolution
- 9 arc-seconds (0.04 mm/m) with SENSLOG/CR1000 data logger
- Repeatability
- ±82 arc-seconds (±0.4 mm/m)
- Supply voltage
- 10-30 Vdc; RS485 digital signal (requires Campbell Scientific data logger)
- Ingress
- Waterproof to 2 MPa (300 psi)
- Housing
- Stainless steel, 32 mm diameter
- Weight
- 0.54 kg per 0.6 m (1.2 lb per 2 ft) gauge length
- Signal cable
- Jumper cable to datalogger; connectors rated to 70 MPa (10,000 psi)
- Casing
- 70 mm (2.75 in) OD casing; 38 mm (1.5 in) Schedule 40 PVC pipe
Related
Often specified alongside
- Range
- ±10° / ±25° / ±50° (selectable)
- Output
- RS-232, RS-422/RS-485; NMEA XDR, Trimble TCM, BAE and Ashtech-compatible formats
- Ingress
- IP65 (NEMA 4X)
Geosystems
Inclinometers and Tiltmeters
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