The GRACO 25V478 is a dual level sensor designed to monitor lubrication fluid tank levels in above ground, stationary tanks. It is constructed for use with GRACO Fluid Defender systems and is intended to provide signals when a tank is either empty or full, helping to prevent pump cavitation or overfill. The sensor is typically made from durable materials suitable for industrial environments, though the specific material is not specified.

Key Features:

• Level Sensor
• Dual Level, 10 ft
• Fluid Defender
• Dual level detection (low and high)
• 10 ft cable for tanks up to 10 ft in height
• Can be tied into air control solenoid to shut off air flow to pumps
• Reliable monitoring of tank levels
• Helps prevent pump cavitation and overfill

Applications:
Monitoring lubrication fluid tank levels in above ground, stationary tanks for industrial and vehicle maintenance applications.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance with GRACO equipment.
• Set the level sensor height at least 2–3 inches above the pump inlet to prevent pump runaway conditions.
• Tighten the cord grip on the cable to finger tight, plus one-half of a turn to secure the sensor in place.
• Connect the level sensor wires following the instructions in the Fluid Defender manual.
• Attach all accessory wires to the Fluid Defender control box following all local codes and regulations.
• Reference the Technical Specifications for maximum wire runs and shielded cable requirements.