Graco 129631 Potentiometer Encoder

Compatible Machines and Overview

Product Overview

The Graco 129631 Encoder Potentiometer delivers precise feedback for airless sprayers, ensuring accurate monitoring of pump speed for a consistent finish. Its sealed housing resists contaminants and provides long service life while maintaining steady voltage signals for automated controls.

• Compact design for easy integration
• Resistant to wear and high-pressure environments
• Compatible with Graco MISC family equipment

Key Features

• High precision potentiometer with encoder functionality
• Dimensions: 2.55 in × 2.10 in × 0.85 in
• Electrical specs: 5 kΩ nominal resistance, linearity tolerance ≤±0.25%
• Mechanical life: ≥100 million shaft rotations
• Voltage output: 0.1–4.9 VDC for 0–300° rotation
• IP65 rated for dust and water resistance

Materials and Construction

The potentiometer uses glass-reinforced phenolic resistive track and a 303 stainless steel shaft. Dual-lip NBR seals protect the sensor from contaminants. Silicone-based lubrication ensures smooth operation from –40°C to 85°C. The housing is made from glass-filled nylon for impact resistance.

Integration and Usage

The 129631 potentiometer mounts via two M3 threaded standoffs, with a 6 mm D-flat shaft for secure torque coupling. It can be used in closed-loop control systems with PLCs, flow sensors, or proportional valves, providing precise flow and pump stroke feedback for industrial and professional coatings applications.

Frequently Asked Questions