elevator parts overload sensor Type ECW-P1 Elevator Load Weighing Device

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Product Description:

Type ECW-P1 Elevator Load Weighing Device


This system is applicable to all elevators with moveable car platform in need of overload signals. This device is of extremely high performance-price ratio. This appliance is to overcome the inherent disadvantage of the mechanical overload switch and to replace it.

Main Property:

1. Working in a contactless and inductive way. No mechanical movement itself. Being directly installed in the original place of overload switch. No necessity of changing the mechanism of elevator car.

2. Adopting strong inductive magnet, improving the anti-interference of the system to the utmost.

3. The electrical property is in compliance with the standard of the International Electrotechnical Commission (IEC).

4. More accurately positioning, small overall size, easy installation and adjustment, simple structure and low price.

Technical Specification:

Application Range

Applicable to all elevators with moveable car platform in need of overload signal with a inspection clearance of 815.



Overload turning pointRated load adjusting point±0.05


System Error

1.5% (540)


Output Mode

1 pair of relay dynamic CLOSE or dynamic OPEN contacts respectively with the capacity of DC/AC 48V/500mA.


Operation Ambient Temperature



Power Supply

AC/DC 24V(±10%)/15mA. The operating current of the whole machine100 mA.


Install Position

Moveable elevator car platform


Overall Size

Column of Φ24×83 mm

Working Principle:

This system weighs the elevator car load based on the principle of the elastic deformation of movable elevator car platform caused by loading with the HALL sensor measuring the change of displacement, fulfilling the aim of load weighing.


1. Please refer to the above figure to install this device with the connecting support (made by the customer himself) close to the middle part of the car platform as near as possible.

2. Let the magnet adhesive on the car platform with the marking-face right facing the induction point of the device.

3. Install and adjust this device so that the magnet on the car platform aims at the center point of its upper face. Meanwhile, assure the end face of this device in parallel with that of the magnet.

4. When elevator is of rated loaded, adjust this device up and down to make the indicator just turn from dark to bright (or oscillating), at this time, fasten this device and the adjustment is finished.    

The principle of system wiring:




Red, black

Sys Operating Power

Operating Power   AC/DC24V(±10%)/100mA

Yellow, White

Overloading relay dynamic Close contact

Contact Capacity:

DC/AC 48V/500mA

Blue, green

Overloading relay dynamic Open contact

Comparison of the functions with other load weighing devices


Mechanical overloading switch

Working Principle

By the use of Hall sensor, the working way of contactless induction is realized.

Advantages:①The system doesnt bear the elevator load directly, extending its life.Overloading signal is of point turning to position more accurately.No system damage caused by the insufficiency of overloading competence or mechanical vibration.

Directly bearing the effect and impact of elevator load, unstable and damageable.

Installingand  adjusting

Just adjust the system up and down so that the indicator will turn from dark to bright. At the turning point, fasten this device well.

Field adjustment is complicated.

Output signal

A pair of relay dynamic Close and Open contacts respectively.

Single function

Economic Analysis

⒈High ratio of property to price, easy use, high reliability.



Accessory: Inductive magnet [20×20×4mm3]  1 piece        Fastening Nut: 2 sets

If there is any abnormality during adjustment or operation, contact our company directly.

Attention: The tombarthite magnet with strong magnetic is specially made for this products, please be careful in the installation process; do avoid the temperature above 100℃ in case of demagnetization; our company will not responsible for any loss for person and the device caused by unsuitbale operation otherwise.

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