d-Sloughmeter Ground failure and deformation sensor
The d-Sloughmeter is a low-cost ground failure sensor that detects cable slippage or rock fall in a borehole, raising an alarm once movement exceeds a set anchor threshold.
- Range
- 0-125 mm displacement (variable inductance sensor)
- Output
- RS485, up to 500 m over 2 x twisted pair
- Resolution
- 0.01 mm displacement; 0.1°C temperature
Overview
In detail
How it works
Solid anchors bonded into the borehole with grout sever a monitoring circuit if the surrounding ground fails, giving an instant fall or slough alert. The instrument supports two compatible modes: an instant check via an LED display box, or continuous logging through a data logger for ongoing surveillance.
An on-board digital temperature sensor adds a temperature reading to every data string.
Deployment
Designed for 50 mm boreholes, the Sloughmeter is available with up to 10 monitoring points at custom locations and custom overall lengths, and arrives on site fully assembled. The electronics head is compact - 25 mm diameter, 220 mm long.
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Specifications
Technical specifications
- Range
- 0-125 mm displacement (variable inductance sensor)
- Output
- RS485, up to 500 m over 2 x twisted pair
- Resolution
- 0.01 mm displacement; 0.1°C temperature
- Operating temperature
- -40°C to 125°C
- Accuracy
- Displacement typically better than 1 mm; temperature ±2°C
- Monitoring points
- Up to 10, custom locations
- Borehole diameter
- 50 mm
- Electronics head
- 25 mm diameter x 220 mm long
Related
Often specified alongside
ESS Earth
Resistance Wire Extensometer RWE
- Application
- Underground hard rock and coal mine displacement monitoring
- Monitoring points
- Pillars, stope walls, roof
Geosystems
JM Series Vibrating Wire Jointmeter
- Range
- 25, 50, 100, 150, 200, 250, 300 mm (200/250/300 mm not available for JM-E)
- Accuracy
Ready to specify?
Add d-Sloughmeter Ground failure and deformation sensor to your enquiry
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