Monitoring Instruments
Vibrating Wire Piezometer
Vibrating wire piezometers in the AT-PIE30 series measure pervious pressure in the foundations of dams, hydraulic structures and other buildings. AT-PIE3031 has secondary sealing for filling type installation, AT-PIE3032 is the filling type standard model and AT-PIE3030 is for drilling type installation. All cover ten pressure ranges from 0.1 MPa to 6.0 MPa and can be supplied with a temperature sensor for the buried point.
ISO 9001:2015 production Samples available Small orders accepted
Product Overview
Vibrating wire piezometers in the AT-PIE30 series measure pervious pressure in the foundations of dams, hydraulic structures and other buildings. AT-PIE3031 has secondary sealing for filling type installation, AT-PIE3032 is the filling type standard model and AT-PIE3030 is for drilling type installation. All cover ten pressure ranges from 0.1 MPa to 6.0 MPa and can be supplied with a temperature sensor for the buried point.
Materials
- Sealed vibrating wire sensor body with filter element
Key Benefits
- Three installation types from one series covering filling and drilling methods
- Ten ranges from 0.1 to 6.0 MPa so resolution matches the head being measured
- Resolution of 0.05 percent FS or better and total error of 1.0 percent FS or better on AT-PIE3031
- Optional temperature channel reading to 0.0625 degrees C resolution at the buried point
- Identification recognition can be added to recover the instrument code after a cable break
Application Scenarios And Who It Is For
Application Scenarios
- Pore and pervious pressure in dam and hydraulic structure foundations
- Long-term embedded monitoring under buildings and structures
- Filling type installation during construction
- Drilling type installation in existing ground
Who It Is For
- Dam owners and hydropower operators
- Geotechnical monitoring contractors
- Consultants designing piezometer arrays
- Construction contractors installing instrumentation during filling works
Problems It Solves
- Uplift and seepage pressure that is never confirmed after commissioning
- Instruments that fail their seal in long-term submerged service
- Selecting one instrument family for both filling and drilling installation
- Lost instrument identity when cables are cut on a busy site
Technical Features
- Specification steps 1 2 4 6 8 10 16 25 40 60
- Measuring ranges 0.1 0.2 0.4 0.6 0.8 1.0 1.6 2.5 4.0 6.0 MPa
- AT-PIE3031 resolution 0.05 percent FS or better and total error 1.0 percent FS or better
- AT-PIE3032 resolution 0.08 percent FS or better and total error 1.5 percent FS or better
- Working temperature minus 25 degrees C to plus 60 degrees C
- Temperature measure accuracy plus minus 0.5 degrees C with 0.0625 degrees C resolution
Specifications
Values below are taken from our published product data. Our tables note that figures are general averages for reference and that actual data should be confirmed by testing within the applicable scope.
| Models | AT-PIE3031 filling type with secondary sealing, AT-PIE3032 filling type, AT-PIE3030 drilling type |
|---|---|
| Specification Steps | 1 2 4 6 8 10 16 25 40 60 |
| Measuring Range | 0.1 0.2 0.4 0.6 0.8 1.0 1.6 2.5 4.0 6.0 MPa |
| Resolution | 0.05 percent FS or better on AT-PIE3031 and 0.08 percent FS or better on AT-PIE3032 |
| Total Error | 1.0 percent FS or better on AT-PIE3031 and 1.5 percent FS or better on AT-PIE3032 |
| Working Temperature | minus 25 degrees C to plus 60 degrees C |
| Temperature Measure Accuracy | plus minus 0.5 degrees C |
| Temperature Measure Resolution | 0.0625 degrees C |
Quality Control
- Each unit calibrated across its selected range
- Secondary sealing checked on AT-PIE3031
- Temperature channel verified where fitted
- Instrument code recorded and matched to the delivery list
Customization Options
- Range selection across the ten steps
- Temperature sensor added on request
- Identification recognition function
- Cable length for the borehole or fill depth
Comparison With Other Products
| Compared With | Why This Product |
|---|---|
| Standpipe and water level meter readings | The piezometer gives continuous embedded pressure data rather than a manual dip reading |
| AT-PIE3031 versus AT-PIE3032 | Choose AT-PIE3031 where secondary sealing and the tighter 1.0 percent FS total error are required |
Use Guide
- Select filling or drilling type to match the installation method
- Saturate the filter before installation as required by your procedure
- Record the initial reading and elevation of the sensor
- Protect the cable and terminate at the readout or logger position
Questions Buyers Ask
Vibrating Wire Piezometer FAQ
Which model suits a borehole installation
AT-PIE3030 is the drilling type model. AT-PIE3031 and AT-PIE3032 are for filling type construction and installation.
What ranges can I order
Ten ranges from 0.1 MPa to 6.0 MPa, matching the specification steps 1 to 60.
Can it measure temperature as well as pressure
Yes. A temperature sensor can be added to measure the buried point, with accuracy of plus minus 0.5 degrees C and resolution of 0.0625 degrees C.
What accuracy should I expect
AT-PIE3031 gives resolution of 0.05 percent FS or better with total error of 1.0 percent FS or better.
How do we identify instruments after a cable break
Order the identification recognition function so the original instrument code can be found after disconnection.
Do you supply the piezometer casing as well
Yes. GT-PC series PVC piezometer casing is available in OD 53, 70 and 80 mm.
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