Description
Product Description
Door Limit Switch for Construction Hoist
Our Door Limit Switch for Construction Hoist is a critical safety interlock device designed to prevent cage operation when hoist doors are not properly closed and locked. As part of the hoist’s safety circuit, this switch ensures that the lift cannot move until all access doors—both cage doors and landing doors—are securely fastened, protecting personnel from falls and entrapment hazards.
Engineered specifically for the demanding conditions of construction sites, our door limit switches deliver reliable performance in dusty, wet, and vibration-prone environments, ensuring consistent safety compliance throughout the project duration.
Key Features
Safety Interlock Function: Normally open (NO) or normally closed (NC) contacts integrated into the hoist control circuit; cage movement is immediately interrupted if any door is opened during operation.
Heavy-Duty Enclosure: Housing rated IP67 or higher, providing complete protection against dust, water, and concrete slurry ingress.
Mechanical Durability: Robust metal or high-impact plastic housing with corrosion-resistant components, designed for millions of actuation cycles.
Positive Break Operation: Ensures reliable contact opening even in the event of spring failure, meeting international safety standards for lift applications.
Applications
Construction Hoists: Door status monitoring for cage doors and landing doors on personnel and material hoists.
Tower Cranes: Access gate interlocks on crane ladders and platforms (where applicable).
Industrial Elevators: Safety interlocks for freight elevator doors and gates.
Material Hoists: Door position sensing for temporary construction lifts and dumbwaiters.
Safety Barriers: Interlock switches for machine guarding and access gates on site equipment.
Our Advantages
Professional supplier of tower crane spare parts
Competitive pricing
Stable supply and fast delivery
Strict quality inspection before shipment
Export experience to global markets
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