Description
Automatic Plumb Line System – Model EPR-01S
The EPR-01S plumb line system is a high-precision automatic monitoring instrument designed to measure rotation, tilt, and relative displacement in large civil engineering structures such as concrete and masonry dams, high-rise buildings, nuclear facilities, and underground caverns.
Encardio-rite’s normal and inverted plumb line systems are simple, proven, and extremely reliable solutions that deliver high-accuracy long-base deformation measurements over extended time periods. They are particularly valuable in dam safety programs for determining relative displacements between:
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Dam crest and base, and
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Base and foundation rock
System Overview
The EPR-01S automatic readout unit forms the core of the system. It incorporates two orthogonal, contactless inductive sensors that measure the pendulum wire’s position in both X and Y directions with 0.01 mm accuracy.
These sensors can read existing in-situ pendulum installations — only a target needs to be attached to the pendulum wire for compatibility with the EPR-01S system.
The system supports both normal (downward-hanging) and inverted (upward-hanging) plumb line configurations, making it adaptable for monitoring displacement in various parts of a structure.
An integrated temperature gauge provides reference data for thermal compensation, and an auxiliary transducer automatically compensates for any wire rotation, ensuring uncompromised measurement precision.
All data can be transmitted to a remote data acquisition system or cloud-based monitoring platform, enabling real-time observation and analysis of structure behavior.
Specifications
| Parameter | Details |
|---|---|
| Instrument Name | Automatic Plumb Line System |
| Model | EPR-01S |
| Measurement Principle | Contactless inductive sensing (X–Y axes) |
| Applications | High-accuracy displacement, tilt, and rotation measurement in dams and tall structures |
| Accuracy | ±0.01 mm |
| Temperature Compensation | Integrated temperature sensor |
| Rotation Compensation | Additional transducer on one axis |
| Output | Digital (2-axis displacement + temperature) |
| Mounting | Compatible with normal and inverted plumb line installations |
| Data Transmission | Local or remote via automated datalogger |
| Protection | IP-65 enclosure for readout unit |
| Operating Temperature | −20 °C to +70 °C |
