Contact-free Limit Switch 024.50

For single and double acting valve control functions

Limit switches are used to control, monitor and view the position of the valve or to activate other system components. There are different versions of on/off limit switches in the market. The most common are based on the principle of echanical switches, proximity sensors or potentiometers. SED has designed and engineered a contact-free limit switch with magnet field measurement technology. Apart from lifetime and among other features the advanced design allows also a more reliable sealing method.


  • For single and double acting valve control functions
  • Suitable for linear and rotary actuators
  • Linear stroke measurement of 3-45 mm
  • Indicates two or three positions
  • Backlash free stroke transmission
  • Short circuit proof
  • M12, 5 pin A-coded connection


  • Contact-Free magnetic measuring design
  • Colored LED light feedback of valve position visible for 360°
  • Compact and robust design
  • Hermetically sealed
  • Easy mounting without additional adapter kits
  • Mounts to all standard valves up to DN100
  • 360° adjustable mounting position
  • Initial programming by light or 24V Signal (5th pin)
  • Set point protection
  • High switching current
  • High chemical resistance


  • ATEX II 2G Ex / II 2D Ex  / II 3G Ex
Diaphragm Size MA8 - MA100
Suitable for:  
Valve Size DN4 - DN100
Pneumatically operated yes
Manual no

pdfDatasheet Limit Switch 024.50
English - 846 kB - TD16 0217.024.50 Rev. b

pdfOperating instructions Limit Switch 024.50
English - 610 kB - BA15 0002 Rev. c