EXTENSOMETER® : Multipoint extensometer sensor for drilling
The extensometer is designed to measure the distance variations between anchors placed at a defined depth and a measuring head located on the surface.
A sensor for measuring settlements and heave
Rods connect each anchor to the head, where measurements are taken with a depth gauge or displacement sensors.
The extensometer head is adapted according to the measurement range, up to 100 mm (3.9") or 200 mm (7.9"), the number of anchors (points) to be measured, and the type of rod used.
The extensometer rods are available in fiberglass or stainless steel.
Each type is inserted in a nylon sheath that prevents friction between the soil/cement and the rod.
Measurements can be made manually with a depth gauge or remotely with vibrating
wire or 4-20mA displacement transducers, connected to a recorder or a portable
reading station.
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Applications
EXTENSOMETER® : multipoint extensometer sensor for drilling
The multipoint extensometer sensor in drilling allows to monitor :
- Tunnels
- Excavations
- Dams
- Foundations
- Settlement and rock displacement measurements
The multipoint extensometer sensor in drilling allows to monitor :
- Tunnels
- Excavations
- Dams
- Foundations
- Settlement and rock displacement measurements
FEATURES | Extensometer® |
|---|---|
SENSOR | |
Technology | Potentiometric |
Output signal | 4-20 mA |
4-20 mA | 30 mm, 50 mm, 100 mm, mm200 |
Accuracy | 0.2% of full scale |
Resolution | ± 0.025% of full scale |
Operating temperature | From -20°C to + 80°C |
Presence of thermistor | NTC 3k Ω |
Thermistor accuracy | ± 0,5°C |
Resolution of the thermistor | 0,1°C |
Excitation method | Pulse or scan |
Materials | Stainless steel |
Protection class | IP68 at kPa1700 |
Need to measure the distance variations between anchors?
