When Dust and Distance Threaten Reliability

On a tank farm walkway, an operator needs to confirm that a moving scraper has reached its end position. Dust, rain, and vibration are constant. The SICK DS50-N1112 answers that challenge with HDDM optical time-of-flight measurement over a 200 mm to 10,000 mm range on 90% remission targets. This rugged sensor delivers dependable switching even when the environment works against it.

The DS50-N1112 belongs to the SICK Dx50 DS50 Switching family. It combines a visible red laser with dual digital outputs and a zinc die-cast housing. Consequently, engineers can deploy it on mission-critical position tasks without adding complex vision systems.

Key Features and Technical Specifications

• Measurement principle: HDDM optical time-of-flight with a visible red laser diode at 658 nm.
• Laser class: Class 2 per IEC 60825-1:2014 and EN 60825-1:2014; average optical power below 1 mW.
• Supply voltage: DC 10 V ... 30 V with reverse-polarity protection and limit values.
• Power consumption: ≤ 2.1 W without external load, keeping the panel supply modest.
• Outputs: Two NPN digital outputs (Q1 and Q2) rated ≤ 100 mA and short-circuit protected.
• Response time: Fast setting 10 ms or Slow setting 50 ms with averaging.
• Switching frequency: Up to 50 Hz for repetitive positioning tasks.
• Repeatability: ≥ 2.5 mm for consistent threshold detection.
• Hysteresis: Adjustable from 1 mm ... 9,999 mm to suppress chatter.
• Enclosure rating: IP65 per EN 60529; housing is zinc die-cast (ZNAL4CU1) with PMMA optics.
• Electrical connection: Male M12 5-pin connector for fast field replacement.
• Dimensions and weight: 36.1 mm x 62.7 mm x 57.7 mm; approximately 200 g.

The operating temperature range is a critical parameter for oil and gas sites. Standard operation spans -30 °C ... +65 °C. With two cooling plates, the range extends to -30 °C ... +80 °C. Adding a protection filter raises the upper limit to -30 °C ... +140 °C when Uv ≤ 24 V. Storage temperature is -40 °C ... +75 °C.

How This unit Handles Demanding Environments

HDDM technology measures distance on natural objects without reflectors. As a result, the sensor suits dirty or vibrating assets where a reflector would foul. The zinc die-cast housing resists impact, while the PMMA window keeps optical performance stable. Furthermore, the IP65 rating supports washdown-adjacent areas and outdoor installations.

Dual NPN outputs allow two independent switching thresholds. For instance, one output can signal “approach” and the other “arrived.” The multifunctional input adds configuration flexibility. Meanwhile, the LC display and menu buttons simplify threshold setup during commissioning.

Because This unit is built for demanding environments, it fits mission-critical level and position loops. Typical applications include tank scraper end-position sensing, conveyor diverter confirmation, and valve position feedback. In each case, the 10 ms fast response supports control cycles that cannot wait.

Installation and Commissioning Guidance

Mount the sensor using its 36.1 mm x 62.7 mm x 57.7 mm body and secure the M12 connector. Keep the laser window clean and aligned with the target surface. During setup, use the display to set switching points and hysteresis. Verify that supply voltage stays within DC 10 V ... 30 V. Additionally, confirm output loads do not exceed 100 mA per channel.

For high-temperature zones, fit the approved cooling plates before power-up. If ambient light is intense, enable the slow averaging setting to stabilize readings. Always follow local laser safety practices for Class 2 devices.

Integration with Control Systems

This unit provides two NPN digital outputs and a multifunctional input. These signals interface directly with PLC digital inputs or safety relays. Because the sensor uses a standard M12 5-pin connector, replacement and cabling remain straightforward. For fieldbus networks, an external gateway or connection module may be required. Confirm cable and gateway compatibility with PetroPartsOnline before ordering.

Maintenance and Long-Term Reliability

Inspect the optical window periodically for dust, oil mist, or condensation. Clean only with approved lens materials and avoid abrasive cloths. Check the M12 connector for moisture ingress and tighten the coupling ring. Since the housing is zinc die-cast, inspect for corrosion in salt-laden atmospheres. These simple steps protect repeatability and extend service life.

Reliability you can depend on starts with correct voltage and temperature margins. Keep supply voltage within DC 10 V ... 30 V and respect the derated temperature limits. If the sensor is used near its upper limit, cooling plates are essential.

Frequently Asked Questions

What is the measuring range of the SICK unit?

This unit measures 200 mm ... 10,000 mm on 90% remission targets, 200 mm ... 6,000 mm on 18% targets, and 200 mm ... 4,000 mm on 6% targets.

What supply voltage does This unit require?

The sensor operates on DC 10 V ... 30 V with reverse-polarity protection and consumes ≤ 2.1 W without external load.

How does This unit perform in high ambient temperatures?

Standard operation covers -30 °C ... +65 °C. With two cooling plates, the range extends to -30 °C ... +80 °C, and with a protection filter to -30 °C ... +140 °C when Uv ≤ 24 V.

What output type does This unit provide?

It offers two NPN digital outputs (Q1 and Q2) rated ≤ 100 mA and short-circuit protected, plus a multifunctional input.

Is This unit suitable for dusty oil and gas sites?

Yes. The IP65 zinc die-cast housing and HDDM optical time-of-flight principle support reliable detection on natural objects in dusty environments.

Ordering and Support

PetroPartsOnline supplies the SICK unit for industrial automation and oil and gas projects. Contact PetroPartsOnline for parts suited to your application's requirements. Please verify current lifecycle status and availability with PetroPartsOnline before ordering.

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