Steinel Ultrasonic Wall Switch Occupancy Sensor (US WLS 1)


The US WLS 1 is a line voltage, single relay, Ultrasonic (40 kHz) wall switch occupancy sensor intended to control lighting in commercial spaces. Ultrasonic is used where the sensor will not have a clear line of site of the occupants in the desired coverage area. The hold OFF photocell daylight option will keep the lighting load off when the light level is greater than the threshold level setting. The convenient “Switch Link” feature enables up to four sensors to link together for pier to pier grouping achieving expanded detection zones and multiway switching.

  • 40 kHz ultrasonic wall switch occupancy sensor
  • Adjustable ultrasonic reach setting from 25% to 100%
  • Line voltage lighting control (120/230/277 VAC, 50/60 Hz)
  • 180° coverage pattern
  • Manual ON or Automatic ON option
  • Light level feature keeps lights OFF when sufficient daylight is present
  • Mounts to a single-gang NEMA-style, standard switch box & decorator-style wall plate by others
  • “Switch Link” communication allows for up to 4 sensors to be grouped together
  • IQ Mode dynamically adjusts the ‘ON’ time delay by learning individual room occupancy
  • Walk through mode option will switch the load OFF in 3 minutes if no additional detection occurs after the first 30 seconds
  • Audible alert feature provides an audible warning that the load will shut-OFF  in 10 seconds unless additional motion is detected
  • Visible alert feature provides a momentary OFF/ON blink,   warning that the load will shut OFF in 10 seconds unless  additional motion is detected
  • Service mode option deactivates the automated functions of the sensor and the load is only manually controlled using the ON/OFF button
Call 800-359-6741
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