- Sisgeo Embankment Extensometers to measure soil strains in large earth structures.
- Embankment extensometers are usually incorporated in the filling material, chained together by means of extension rod.
- Consists of several measuring units connected by extension rod to the anchor plates.
- Measuring unit is a telescopic section equipped with displacement transducer. Vibrating wire displacement transducers are available in different ranges.
|EXTENSION RODS||ANTIFRICTION SLEEVE|
|Length||1, 2 or 3 m ( ~ 3, 6 or 9')||continuous|
|Dimensions||Ø 27 mm (¾”)||Ø 55 mm (2.2") nominal|
|Material||galvanised steel||corrugate pvc|
|Dimension||Ø 500 mm (20")||square, 500 x 500 mm|
|Material||galvanised steel||galvanised steel|
|Measurement principle||vibrating wire with built-in thermistor||vibrating wire with built-in thermistor||vibrating wire with built-in thermistor|
|Range||50 mm (2")||100 mm (4")||150 mm (6")|
|Accuracy Pol. MPE(1)||< ±0.30% FS||< ±0.30% FS||< ±0.30% FS|
|Output signal||frequency (VW), resistance (thermistor)||frequency (VW), resistance (thermistor)||frequency (VW), resistance (thermistor)|
|Sensitivity (2)||see calibration report||see calibration report||see calibration report|
|Typical frequency range (3)||2250 - 3000 Hz||2250 - 3000 Hz||2250 - 3000 Hz|
|Operating temperature||-20°C +80°C||-20°C +80°C||-20°C +80°C|
|Length||1000 mm ±25 mm||1000 mm ±50 mm||1000 mm ±75 mm|
|Material and IP class||stainless steel, IP68 up to 1.0 MPa||stainless steel, IP68 up to 1.0 MPa||stainless steel, IP68 up to 1.0 MPa|
|Max cable length to logger (4)||1000 m (for more information see FAQ#77)||1000 m (for more information see FAQ#77)||1000 m (for more information see FAQ#77)|