DEX and DEX-S 3D analog extensometer 1 DEX and DEX-S 3D analog extensometer 2
DEX and DEX-S 3D analog extensometer 1 DEX and DEX-S 3D analog extensometer 2

DEX and DEX-S 3D analog extensometer

DEX and DEX-S 3D analog extensometer are used in conjunction with flush-coupled ABS inclinometer casing for the measurements of settlement or heave. DEX-35 in-place system is designed to be left inside the casing to permit automatic or continuous monitoring. Strings of in-place extensometer sensors are joined together with stainless steel wire or rods. The probes can be located at different depths where the settlement occurs. DEX-35S is also equipped with biaxial tilt sensor for 3-D automatic borehole profile monitoring.

Infrastructure | Geotechnical Instrumentation | SISGEO
Model DEX-35 DEX-35
Measuring Range 100 mm (±50 mm), 500 mm (±250 mm), 1000 mm (±500 mm) 100 mm (±50 mm)
Sensor resolution 0.01 mm 0.005 mm
Sensor Repeatability ±0.05 mm ±0.05 mm
Sensor stability @ 60 days < ±0.1mm for 100mm range < ±0.1mm
Sensor accuracy:
Lin. MPE 
Pol. MPE


100mm
< ±0.30% FS (< ±0.30 mm)
< ±0.25% FS (< ±0.25 mm)
500mm
< ±0.10% FS (< ±0.5mm)
< ±0.08% FS(< ±0.4 mm)
1000mm
< ±0.10% FS (< ±1.0 mm)
< ±0.08% FS(< ±0.8 mm)
100mm
< ±0.30% FS (< ±0.30mm)
< ±0.25% FS (< ±0.25mm)





 
Signal output 0-10V DC (settlement sensor) 0-10V DC (settlement sensor), 4-20mA (tilt sensors), Ohm (temperature)
Power Supply 24 V DC 24 V DC
Consumption 70 mA @ 24 V DC 70 mA @ 24 V DC
Operating temperature –30°C to +70°C –30°C to +70°C
Water resistance IP68 up to 1.0 MPa (higher pressure rating available on request) IP68 up to 1.0 MPa (higher pressure rating available on request)
Materials stainless steel and thermoplastic resin stainless steel and thermoplastic resin