Description
Earth Pressure Cell – Model EPS-30V-S
The Encardio-rite Model EPS-30V-S is a vibrating wire earth pressure cell designed to measure total pressure in soil, earth fills, and embankments.
It provides highly accurate and long-term reliable data on stress distribution within soil and fill materials — essential for assessing the performance and stability of embankments, retaining structures, and foundations.
System Overview
The EPS-30V-S comprises two stainless-steel discs welded together around their periphery to form a flat, flexible pressure pad.
This pressure pad is connected to a vibrating wire pressure sensor through a 6 mm diameter × 165 mm long stainless-steel tube, forming a sealed hydraulic system filled with de-aired fluid.
When external pressure acts on the soil surface, it is transferred through the fluid to the vibrating wire transducer.
The sensor converts the resulting pressure change into a frequency output, which can be read using any compatible vibrating wire readout unit or automatic datalogger.
The EPS-30V-S is hermetically sealed by electron beam welding, ensuring long-term waterproofing and corrosion resistance, even in saturated or aggressive environments.
Specifications
| Parameter | Details |
|---|---|
| Instrument Name | Earth Pressure Cell |
| Model | EPS-30V-S |
| Sensor Type | Vibrating wire |
| Measured Parameter | Stress / Total Pressure |
| Application | Measurement of total pressure in soil, earth fills, and embankments |
| Range (MPa) | 0.5, 1.0, 2.0, 3.5, 5.0, 10.0 (specify) |
| Accuracy | ±0.25 % F.S. standard / ±0.1 % F.S. optional |
| Non-linearity | ±0.5 % F.S. |
| Over-range Capacity | 150 % F.S. |
| Temperature Range | −20 °C to +80 °C |
| Pressure Pad Dimension (mm) | Ø 200 × 7 T |
| Connecting Tube | Ø 6 × 165 mm stainless-steel tube |
| Material | Stainless steel (electron-beam welded) |
| Output | Frequency (Hz) |
| Thermistor | YSI 44005 or equivalent |
| Protection | Hermetically sealed, IP-68 rated (water-resistant up to full range) |
