NSR22-BM Belt Misalignment Switches


  • Cast Aluminum Body
  • It is resistant to blow and heavy conditions.
  • Alarm and Stop Angle Option
  • IP68 Protection Class
  • It has CE and EAC Standards.
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NSR22-BM Belt Misalignment Switches

NSR22-BM Belt Misalignment Switch is a conveyor belt safety accessory designed to alarm and/or shut down conveyor systems in the event of a conveyor belt misalignment.It is designed to prevent damage to the belts and equipment due to the misalignment of the conveyor belt system.

NSR22-BM series of products do not require any maintenance. 

Materials used:

The body structure is covered with aluminum cast static paint that is resistant to corrosion.Shaft and Arm mechanisms are made of stainless steel.

Uses and Applications:

It is mounted on both sides of the conveyor belt to be attached to the chassis.If the belt begins to deviate, it makes contact with the roller arm causing it to spin. As more force is applied to the roller arm, it will rotate away from the normal position.

At a 15°, it will actuate the first alarm microswitch. The first microswitch will annunciate the alarm condition to the control system. If the belt continues to slip, the system is stopped by activating the second microswitch at a 30 ° position.

Safety Features:

The heavy-duty rugged design makes them suitable for most industrial applications.It can be used with only one contact mechanism without using alarm contact.

General Description:

The roller arm of the switch is placed about 15 cm away from the normal belt position.

Available modifications as per request:

-           The alarm contact structure can be added

Certifications and Standards:

The microswitch used in products is VDE approved. All KBT Electric products are produced in accordance with CE and EAC standards.

Technical Specifications

Enclosure Aluminium Casting
Micro Switch Rating 400 VAC 6A / 230 VAC 8A / 24 VDC 10A
Output Signal (1) SPDT shutdown, alarm can be added upon request.
Cable Gland 2 x M25
Temperature Rating -55°C to +100°C
Contact Angle 25°  Alarm Model: 15° and 35°
Contact Type Snap-action
Protection Class IP68
Enclosure Color Red (RAL 3020)
Weight 3.9 Kg
Mounting Orientation It is suitable for double-sided use.
Impact Rating IK09 (EN 62262)
Warranty Period 36 Months

Safety Standards

Electrical Safety EN 60947
Mechanical Safety EN 60204
Outdoor Safety EN 60529
Impact Resistance EN 62262
Certificates CE, EAC
Micro switches are VDE approved.


ATEX Zone 21 / Zone 22
Without Reset Lever
Bus Security Interface
Custom Contact Angles
Mounting Bracket
Custom Arm Dimensions

Model Specifications

Model Alarm Stop Reset
NC NO Angle NC NO Angle
NSR22-BM       1 1 25° Avaible
NSR22-BM-A01       1 1 25° -
NSR22-BM-A11 1 1 15° 1 1 35° Avaible
NSR22-BM-A11B 1 1 15° 1 1 35° -
NSR22-BM-22       2 2 25° Avaible
NSR22-BM-A02       2 2 25° -
NSR22-BM-33       3 3 25° Avaible
NSR22-BM-A03       3 3 25° -
NSR22-BM-A33 1 1 15° 2 2 35° Avaible
NSR22-BM-A33B 1 1 15° 2 2 35° -

Spare Parts

Model Features
KB-826 1NO+1NC Switch
KB-R-01 M25x1,5 Cable Gland
KB-KT-01 M25 Blind Plug
KB-4-KN 4 Pin Connector
BA-11 Mounting Bracket (Can be made in custom dimensions)
KB-NGV-01 Enclosure
TSR-42-BM-EX Stainless Steel Roller Arm
KB-PM Reset Lever