VW Analyzer


Durham Geo Slope Indicator's VW Analyzer is the most innovative vibrating-wire field reader available.

The VW Analyzer is field ready to quickly measure your sensor, save your data, and communicate the results with custom PDF reports and spreadsheet output. VW Analyzer measurements are geo-located with an integrated GPS, allowing the device to verify locations and direct you to your sensors. The VW Analyzer uses spectral-analysis technology (VSPECT™) to provide the best vibrating-wire measurement possible while filtering out environmental and electrical noise. The large color display offers you an easy-to-view graphical presentation of the data.

Benefits and Features

  • Create custom PDF reports
  • Measurement confidence with graphical display and VSPECT technology
  • Full-color screen and easy-to-use menus
  • Integrated GPS records sensor location
  • Able to read any vibrating-wire sensor
  • Sensor library containing common vibrating-wire sensors
  • Quick transfer of PDF and CSV files with a USB connection
VW Analyzer

Detailed Description

The Vibrating-Wire Analyzer (VWA) uses patented VSPECT™ technology for the most reliable vibrating-wire measurements available. The VWA converts measurements to engineering units, generates a printable PDF report, and saves a CSV summary file. The graphical display allows confirmation of sensor output and operation. VSPECT™ technology eliminates disruptive noise interference and provides sensor diagnostics for the best measurement possible. VSPECT™ noise immunity allows gages that are otherwise unreadable to be evaluated with confidence.

A Project File maintains Site/Sensor information for 40 unique sites with 22 sensors per site. Site/Sensor locations are geolocated, allowing the internal GPS to guide a user directly to a sensor location. Site/Sensor and user information can be created or edited on the device or with a computer using the free VwProjects software.

Note:  The VWA can be connected to a computer and is treated like an external memory device (flash memory drive) to transfer data.

Output and Diagnostics

VW Analyzer Specifications

VW Analyzer Specifications
1,700 site/sensor measurements (most recent)
40 unique sites, 22 sensors per site
240 single measurements (most recent)
16,500 continuous measurements (most recent)
80 MB USB memory (PDF, CSV, VWA, and other files)
GPS±5 m (16.4 ft) typical (±1 ms time sync)
Channel Count1 channel (vibrating wire and thermistor reading)
Battery Type/Life5 AA (1.5 V), 20 hours continuous use
Operating Temperature20° to +70°C
ComplianceCE, RoHS
USB Mini BDirect connect to PC (Supplies power to retrieve data)
WarrantyOne year against defects in materials and workmanship
Dimensions200 x 100 x 58 mm (7.9 x 3.9 x 2.3 in.)
Weight0.34 kg (0.75 lb)
Measurements: Vibrating-Wire
Vibrating-Wire Frequency Range300 to 6500 Hz
Resolution0.001 Hz RMS
Accuracy±0.005% of reading
Excitation2 V, 5 V, 12 V (user-selectable)
MethodVSPECT (Vibrating-Wire Spectral Analysis), U.S. Patent No. 7,779,690
Measurement Interval Range1 s to 15 min (continuous reading mode only)
Speed1 s (fastest)
Measurements: Thermistor
Resolution0.01 Ω RMS
Accuracy±0.15% of reading
The Vibrating-Wire Analyzer (VWA) can measure all vibrating-wire sensors including, but not limited to, strain gages, piezometers, pressure transducers, tiltmeters, crackmeters, and load cells. The VWA has an integrated sensor library that contains common sensors from common vibrating-wire manufacturers; use of the sensor library allows the VWA to output data using engineering units.