d-Civil Exto
The D Civil Exto is a Yieldpoint borehole extensometer built from polycarbonate, stainless steel and aluminium alloy, with an on-board microprocessor that reads ground displacement directly in millimetres to a resolution of 0.01 mm.
- Range
- Length up to 25 m (80 ft)
- Resolution
- 0.01 mm
- Accuracy
- 0.05 mm
Overview
In detail
How it works
An on-board microprocessor gives readings directly in millimetres, with a unique individual ID tag and an on-board temperature sensor for each unit. Resistance to stretching is manually adjustable for complete adaptability to soil and grout conditions, and high-profile anchor points give better tracking of soil movement. The instrument is completely immune to water and will keep working even if distal sections are lost.
Deployment
Anchor points are 6 in (150 mm) long and 1¾ in diameter, with steel washers for a secure grip in soft grout; the recommended grout mix is 5 parts water, 2 parts Portland cement and 1 part bentonite by weight. It is compatible with an Ethernet gateway, WiFi gateway or RF node, and stores up to 100 ASCII characters per reading.
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Specifications
Technical specifications
- Range
- Length up to 25 m (80 ft)
- Resolution
- 0.01 mm
- Accuracy
- 0.05 mm
- Dimensions
- 25 mm (1 in) diameter
- Anchor point
- 6 in long, 1¾ in diameter, with steel washers
- Materials
- Polycarbonate, stainless steel, aluminium alloy
- Compatibility
- Ethernet gateway, WiFi gateway, RF node
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
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