ER-104 E.L.B. Electrode Relay – Key Features

• Purpose: Designed for conductive level detection and control in liquid media.
• Applications:
  • Limit level detection (e.g., overflow, dry run)
  • Min./Max. control
  • Pump control with hysteresis
  • Contact protection relay for low-load signal pickups
• Construction:
  • Slimline design (22.5 mm width) for efficient space usage
  • Comprises three units: power supply, switching amplifier (with hold function), and switching relay
• Operation:
  • Uses conductive electrodes submerged in liquid to detect levels via low AC current
  • Adjustable trigger threshold for switching response
  • Selectable working direction:
    • Closed circuit: relay activates when electrodes are dry
    • Open circuit: relay activates when electrodes are wet
• Output: SPDT (Single Pole Double Throw) potential-free contact
• Sensitivity: Wide adjustment range for precise control
• Power Efficiency: Low power consumption for industrial use
• Protection: IP40-rated housing for robust performance in harsh environments