Elevator Limit Switch

Overview

Elevator limit switches are the mechanical and proximity switches in the shaft and machine room that define the travel limits and stop the car before it reaches the physical end of travel. They are the final electrical stop, so their reliability matters more than their cost. One Elevator supplies replacement limit switches, final limit switches and the actuating cams that trigger them.

Applications

They are fitted in passenger lifts, freight elevators, hospital beds lifts and service lifts in residential blocks, office towers, hotels, hospitals and industrial sites, and suit OTIS, KONE, Schindler, Mitsubishi, ThyssenKrupp and Fujitec machines. Limit switches are replaced after water ingress, mechanical damage or contact failure, and are checked at every statutory inspection. Pit flooding is the single most common cause of limit switch failure. Because switches are cheap and access is expensive, most sites replace all the shaft switches during one visit rather than one at a time.

Types and Range

• Rotary cam limit switches for the final limits
• Linear and plunger limit switches for the shaft
• Inductive and magnetic proximity switches
• Slow-down switches and terminal stopping switches
• Actuating cams, ramps and mounting brackets
• Switch contacts, rollers and replacement levers

Contact ratings are matched to the safety circuit voltage and current.

Selection Guide

Choose by confirming three things: the switch type and contact configuration, the actuating method (cam, plunger or magnet), and the mounting pattern. Check the operating force and overtravel as well, since a switch mounted too close to its stop will be destroyed on the first overrun. After fitting, the switch must be functionally tested by running the car onto it under inspection control. All switches are tested for contact resistance, insulation and mechanical life.

Ordering and Lead Time

Most sizes ship within 5-7 days. Send us a photo of your existing switch with the contact configuration, and we will confirm compatibility and quote within one business day.

Frequently asked questions

How do I order a limit switch?

Give us the contact configuration, the body type and the actuating distance, or a photo of the existing switch with its model marking.

What causes repeated limit switch faults?

Usually a worn roller lever or a switch that has drifted out of adjustment, not an electrical failure. Check the mechanism before replacing the switch.

Do you stock common body styles?

Yes, and stock sizes ship in 5-7 working days. Send a photo showing any marking and we will identify the exact replacement.