What the SICK DT50-N1123 Solves in Demanding Environments

The SICK DT50-N1123 is a direct diffuse distance sensor that measures natural objects up to 10,000 mm without a reflector. It uses HDDM optical time-of-flight technology and a visible red laser diode rated Class 1 eye-safe. Built for demanding environments, this sensor pairs a zinc die-cast housing with IP65 protection.

Distance measurement in oil and gas operations often fails when targets are dark, reflective, or far away. This unit addresses that pain point with a 200 mm to 10,000 mm range on 90% remission targets. It also reaches 6,500 mm on 18% remission and 4,000 mm on 6% remission. Consequently, operators gain dependable readings across mixed surfaces without adding reflectors.

Key Features and Technical Specifications

• Measurement principle: HDDM optical time-of-flight with high definition distance measurement.
• Measuring range: 200 mm to 10,000 mm at 90% remission; 200 mm to 6,500 mm at 18%.
• Light source: Visible red laser diode at 658 nm, Class 1 eye-safe per IEC 60825-1:2014.
• Repeatability: ≥ 2.5 mm for stable position feedback.
• Measurement accuracy: Typ. ± 10 mm.
• Response time: Fast 20 ms or Slow 30 ms via averaging setting.
• Supply voltage: DC 10 V ... 30 V with reverse-polarity protection.
• Power consumption: ≤ 2.1 W without external load.
• Outputs: One NPN digital output (≤ 100 mA) and one 4 mA ... 20 mA analog output (≤ 300 Ω, 16-bit).
• Electrical connection: Male connector M12, 5-pin.
• Enclosure rating: IP65 per EN 60529.
• Ambient temperature, operation: -30 °C ... +65 °C; up to +140 °C with two cooling plates and protection filter.
• Housing: Zinc die-cast (ZNAL4CU1) with acrylic glass (PMMA) optical window.
• Dimensions: 36.1 mm x 62.7 mm x 57.7 mm; weight approx. 200 g.

The wide input voltage range of DC 10 V ... 30 V suits common industrial supplies. Meanwhile, the ≤ 2.1 W power consumption keeps heat load low inside enclosures. These electrical traits support reliable operation in mission-critical cabinets.

How Does This unit Handle Harsh Oil and Gas Conditions?

Field engineers face dust, washdown, and temperature swings. The IP65 rating blocks dust ingress and water jets, so the sensor survives routine cleaning. In addition, the zinc die-cast housing resists mechanical impact in heavy-duty automation. The operating temperature range of -30 °C ... +65 °C covers most outdoor and plant-floor installations. For hotter zones, official cooling plates extend the range to +80 °C, and a protection filter with two plates reaches +140 °C.

Another pain point is ambient light interference. HDDM time-of-flight measurement provides ambient light stability, so sunlight or strong lamps do not disrupt readings. As a result, This unit remains field-proven in exposed positions. The Class 1 laser is eye-safe under IEC 60825-1:2014, which simplifies access around the measurement zone.

Where the SICK unit Fits: Application Scenarios

Level monitoring in tanks and silos benefits from the 10 m range without reflectors. Position feedback on conveyors and gates uses the analog 4 mA ... 20 mA output for continuous tracking. Collision avoidance on moving equipment relies on the fast 20 ms response time. Furthermore, the multifunctional input allows application-specific switching behavior. In each case, the sensor delivers dependable distance data for control decisions.

Installation and Integration Notes

Mount the sensor with a clear line of sight to the target surface. The M12 5-pin male connector carries supply voltage, digital output, analog output, and the multifunctional input. Use shielded cable in electrically noisy plants. Because the analog output is a current loop, keep loop resistance at or below 300 Ω. The NPN digital output sinks up to 100 mA, so verify load compatibility before wiring. For network integration, This unit provides direct I/O rather than a fieldbus port. If your control architecture requires a fieldbus, confirm gateway or connection module options with the supplier.

Maintenance and Long-Term Reliability

Inspect the PMMA optical window periodically for dust and residue. Clean it gently according to plant procedures; avoid abrasive materials. Check the M12 connector for tightness after vibration-heavy service. Verify that ambient temperature stays within -30 °C ... +65 °C, or add cooling plates where needed. These simple steps protect measurement accuracy and extend service life. Reliability you can depend on starts with routine inspection.

Frequently Asked Questions

What is the measuring range of This unit?

The SICK unit measures from 200 mm to 10,000 mm on 90% remission targets. On 18% remission targets the range is 200 mm to 6,500 mm, and on 6% remission it is 200 mm to 4,000 mm.

What supply voltage does This unit require?

The sensor operates on DC 10 V ... 30 V and includes reverse-polarity protection. Power consumption is ≤ 2.1 W without external load.

Is This unit laser eye-safe?

Yes. The visible red laser diode is Class 1 eye-safe per IEC 60825-1:2014 and EN 60825-1:2014.

What is the operating temperature range of This unit?

The standard operating range is -30 °C ... +65 °C. With two cooling plates it extends to +80 °C, and with two cooling plates plus a protection filter it reaches +140 °C.

Which outputs are available on This unit?

The sensor provides one NPN digital output rated ≤ 100 mA and one 4 mA ... 20 mA analog current output with ≤ 300 Ω load and 16-bit resolution.

Contact PetroPartsOnline for parts suited to your application's requirements.

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