Ultrasonic sensors

Your Benefits

  • Proven cubic housing shape provides compatibility to other technologies
  • High flexibility due to IO-Link enables dynamic adaptation to changing application requirements
  • The complementary digital outputs signal cable breakage to prevent production errors
  • Integrated temperature compensation ensures high measurement accuracy at all times for optimum process quality
  • The sensor’s immunity to external factors enables it to take reliable measurements even in dirty, dusty, humid, and foggy conditions


The UC12 product family in the proven cubic metal housing is very rugged and at the same time easy to handle. Thanks to complementary digital outputs with IO-Link, it combines high flexibility with the well-known reliability of ultrasonic technology.

At a glance
  • Rugged and proven housing design
  • Fast teach-in of the complementary digital outputs via pushbutton or IO-Link
  • Optimal background suppression
  • Integrated temperature compensation
  • Detection, measurement, or positioning with ultrasound
  • Regardless of material color, transparency, gloss, or ambient light


Virtually unlimited use – regardless of color, gloss, and transparency

SICK ultrasonic sensors perform measurement and detection tasks in a wide variety of application areas on colored, shiny, or transparent surfaces, which are particularly challenging for optical sensors. Even adverse ambient conditions such as dust, dirt, or fog hardly affect the measurement result. The broad detection range also allows for a large field to be monitored with just one sensor – with a measuring range of 13 mm to 8 m. No matter where they are: the ultrasonic sensors from SICK are at your side in any industry. The extensive product portfolio offers you a wide range of solutions for your application. See for yourself.

Find out more about the principle of operation of the ultrasonic sensors.

(Acoustic) time-of-flight measurement

The sensor emits an acoustic pulse that is reflected by the object being detected. The time required for the pulse to go from the sensor to the object and come back again is measured, evaluated and converted into the distance as follows.

Distance = speed of sound x total acoustic time of flight (t2) / 2

Scanning range of ultrasonic sensors In general on ultrasonic sensors, the less sound the object being measured absorbs, the greater the possible scanning range. The operating range specifies the distance up to which measurement on common objects with sufficient operating reserves is possible. Under ideal conditions, the sensor can even be used up to its limiting range. Switch panels are used for ideal assessment of application capability. The dark blue area shown in these switch panels shows an example of the sensor's working range if a round rod is detected. The light blue area shows the maximum detection range (limiting range) which can be achieved under ideal conditions for easily detectable objects, such as the aligned plate given here. This area between the sensor and the measuring object should be kept free of other objects to prevent them from being detected accidentally. The detectability and detection range of an object depend on its reflective properties, size, and alignment. Depending on the application, the sensor may also be able to detect very small objects, e.g. metal wire.

Applications in focus

Ultrasonic sensors are true all-rounders. SICK ultrasonic sensors demonstrate their reliability and precision in virtually any application, from measuring distances or detecting solid, powdered, or liquid media. No matter the industry, no matter the application.

SICK ultrasonic sensors show their strengths in the contact-free detection of objects in all imaginable applications. These all-rounders reliably and precisely master all automation requirements on your processes.

SICK LifeTime Services

SICK’s services increase machine and plant productivity, enhance the safety of people all over the world, provide a solid foundation for a sustainable business operation, and protect investment goods. In addition to its usual consulting services, SICK provides direct on-site support during the conceptual design and commissioning phases as well as during operation.

The range of services not only covers aspects like maintenance and inspection, but also includes performance checks as well as upgrades and retrofits. Modular or customized service contracts extend the service life of plants and therefore increase their availability. If faults occur or limit values are exceeded, these are detected at all times by the corresponding sensors and systems.

Consulting and design Application-specific advice on the product, its integration and the application itself.
Commissioning and maintenance Application-optimized and sustainable ─ thanks to professional commissioning and maintenance by a trained SICK service technician.
Service contracts Extended warranty, SICK Remote Service, 24-hour helpdesk, maintenance, availability guarantees and other modular components can be individually combined on request.


Technical overview

  • Technical data overview

    Technical data overview

    Measuring range
    Operating range20 mm ... 250 mm
    Limiting range250 mm / 350 mm
    Resolution≥ 0.1 mm
    Repeatability± 0.15 %
    Response time30 ms
    Output time8 ms
    Switching frequency25 Hz
    Digital output
    TypePNP / NPN / push-pull: PNP/NPN
    IO-Link✔ , IO-Link V1.1
    Enclosure ratingIP65 / IP67
    Sending axisStraight
    Ambient temperature, operation–25 °C ... +70 °C
All technical data can be found accompanying the individual product