Description
Vibrating Wire Center Hole Load Cell – Model ELC-31V
The Encardio-rite Model ELC-31V is a vibrating wire type center hole load cell designed for accurate measurement of load in rock bolts, tieback anchors, and other tensioned structural elements.
The sensor converts applied mechanical load into a frequency output, ensuring stable, noise-immune data that can be transmitted over long distances without signal degradation.
For specialized applications, a solid (non-center-hole) version of the load cell for stress measurement in tunnel supports and struts is also available on request.
System Overview
The ELC-31V consists of a fluid-filled high-strength steel cylinder with a vibrating wire pressure sensor attached. As the applied load increases, the internal fluid pressure rises proportionally, and the vibrating wire sensor translates this change into a precise frequency output.
This design provides excellent thermal stability, long-term reliability, and minimal signal drift, even under harsh environmental conditions.
The system can be easily connected to Encardio-rite data loggers (e.g., ESDL-30 series) for automated real-time load monitoring.
Specifications
| Parameter | Details |
|---|---|
| Instrument Name | Center Hole Load Cell |
| Model | ELC-31V |
| Sensor Type | Vibrating wire pressure transducer |
| Measured Parameter | Axial load |
| Range (kN) / Internal Diameter (mm) | 250 / 35, 500 / 52, 750 / 78, 1000 / 105, 2000 / 130, 2500 / — |
| Overload Capacity | 110% F.S. |
| Calibration Accuracy | ±1.0% F.S. |
| Non-linearity | ±2.0% F.S. (from 10% to full range) |
| Temperature Range | −10 °C to +50 °C |
| Temperature Effect | ±0.06% F.S./°C |
| Thermistor | YSI 44005 or equivalent |
| Output | Frequency (Hz) |
| Protection | Hermetically sealed, corrosion-resistant steel body |
