Relative pressure sensor E8PC series

piezoelectricstrain gauge4-20 mA

Overview
The OMRON E8PC is a compact multi-sensing sensor that measures pressure and temperature simultaneously at the same position and communicates via IO-Link. It is designed for inline monitoring in hydraulic and sealant systems to detect early signs of abnormalities and support process stabilization.

Pressing machine — Problems

• Rising hydraulic oil temperature reduces oil viscosity.
• Reduction in hydraulic pressure causes inconsistent press quality.
• Pressure monitoring alone cannot detect temperature-driven viscosity changes.

Pressing machine — Solution from OMRON

• Combine pressure and temperature measurements to detect early signs of pressure loss and oil viscosity change.
• Quantify optimal temperature and pressure ranges at the same sensing position without relying solely on operator experience.
• Send condition data to PLCs via IO-Link for automated alarms and corrective actions.

Machining center — Problems

• Hydraulic oil temperature increases during repeated tool changes.
• Packing deterioration causes hydraulic oil leaks.
• Pressure drops degrade machining quality.
• Multiple hydraulic sections make locating degraded packing time-consuming.

Machining center — Solution from OMRON

• Use temperature rise as an indicator of potential leaks and packing degradation.
• Monitor temperature trends to correlate temperature behavior with packing wear.
• Mount multiple sensors on different pipes; the LED display and IO-Link data allow rapid identification of the affected line.

Sealant dispenser — Problems

• Dispensed volume varies at the same pressure because sealant viscosity changes with temperature.
• Both dispensing pressure and temperature must be controlled to ensure consistent volumes.
• Limited space may prevent installing separate pressure and temperature sensors.

Sealant dispenser — Solution from OMRON

• Simultaneous pressure and temperature sensing enables detection of conditions that cause dispensing variation.
• Quantify optimal dispensing pressure and temperature ranges without relying on operator skill.
• A single multi-sensing sensor saves installation space compared with two separate sensors.

Key features

• Multi-sensing: simultaneous measurement of pressure and temperature at the same position.
• Pressure sensing: piezoelectric element with high-hard ceramic sensing surface; pressure detected via strain gauge resistance changes.
• Temperature sensing: element mounted behind the piezoelectric element for co-located measurement.
• Multi-sensing display (patent pending): visualizes causes of abnormalities by monitoring Flow+Temperature and Pressure+Temperature; outputs to PLC via IO-Link.
• Unit display and scaling: converts units and scales detected values to application reference values.
• High-luminosity LED display with configurable color patterns (3 color patterns + off).
• Angle adjustment up to 330° and 180° reverse display for flexible mounting.
• Peak/Bottom Hold, NPN/PNP output polarity selection, and two-channel analog current outputs.
• Self-diagnostic outputs and batch setting from host via IO-Link for maintenance efficiency.
• Compatible with Visualization Software F-Scape for remote monitoring without complex programming.
• Compact, easy-to-clean design and durable liquid-contact materials; expanded cable and adapter options available (sold separately).

Specifications

• Model name: E8PC.
• Sensing principle (pressure): piezoelectric element with high-hard ceramic sensing surface.
• Temperature sensing: element mounted behind the piezoelectric element for simultaneous measurement at the same position.
• Outputs: IO-Link communication supported; two-channel analog current outputs for simultaneous physical quantity outputs.
• LED display: high-luminosity with configurable color patterns (3 colors + off).
• Polarity selection: NPN/PNP selectable by button.
• Display orientation: 330° angle adjustment; 180° reverse display.
• Functions: scaling (reference adjustment), peak/bottom hold, self-diagnostics, batch setting from host via IO-Link.
• Recommended accessories: dedicated adapters (sold separately); throttle recommended for systems with pulsation or vibration.
• Design: compact, easy-to-clean, durable liquid-contact parts.
• Patent status: multi-sensing display patent pending (applied in Japan as of July 2022).