Description
The KD-2PS-L is a pedal assist sensor used on electric bicycles to detect pedaling motion and signal the controller to apply motor assistance. It uses a 12-magnet ring and a dual Hall sensor to provide faster, more accurate response than lower-magnet designs.
This sensor is typically installed on the left side of the bike and is used as a replacement or upgrade for older split-ring PAS systems.
Key Features
• One-piece pedal assist sensor design
• 12 internal magnets for higher signal resolution
• Dual Hall sensor for faster, more consistent response
• Improved accuracy compared to low-magnet PAS sensors
• Durable PC plastic housing for long service life
• Compact and lightweight design
Compatibility & Use Notes
• PAS type: Cadence sensor
• Magnet count: 12
• Connector: 3-pin
• Signal type: High / low pulse rate 5:5
• Nominal voltage: DC 4.5–6V
• Designed for left-side crank installation
• Intended for controllers that support cadence-based PAS input
• Not compatible with torque-sensor systems
• Not universal—controller PAS requirements must match
Service / Ownership Context
Pedal assist sensors must be aligned correctly to function reliably. During installation, ensure proper spacing and secure mounting to prevent signal dropouts. After installation, verify that assist engages smoothly and disengages immediately when pedaling stops.
Fit & Use Signals
• Good fit for e-bikes using cadence-based PAS systems
• Good fit for replacing older split-ring PAS sensors
• Good fit if you want quicker assist engagement
• Not a fit for torque-sensor e-bike systems
• Not a fit if your controller does not support 3-pin PAS input
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