Pepperl+Fuchs UDC-18GM-400-3E3 Double Sheet Sensor

USD 925.92

Ultrasonic double sheet sensor with 20-60mm range, 18-30VDC, 3 PNP outputs, IP67. Detects paper, metal, and plastic foils from 10-2000 g/m² without teach-in.

SKU PEPPERL-FUCHS-UDC-18GM-400-3E3 Category
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Pepperl+Fuchs UDC-18GM-400-3E3 Double Sheet Sensor

Model Identifier UDC-18GM-400-3E3
Official Part Number UDC-18GM-400-3E3
GTIN Standard NA

Technical Overview

Ultrasonic double sheet sensor with 20-60mm range, 18-30VDC, 3 PNP outputs, IP67. Detects paper, metal, and plastic foils from 10-2000 g/m² without teach-in.

Key Features

  • Ultrasonic system for reliable detection of no, one, or two overlapping sheet materials, preferably papers.
  • No teach-in required, simplifying installation and operation.
  • Function indicators visible from all directions (LED green: single sheet, LED yellow: no sheet, LED red: double sheet).
  • Insensitive to printing, colors, and shining surfaces.
  • Supports material weights from 10 g/m² up to over 2000 g/m².
  • Detects a very wide material spectrum, including finest papers, thin sheet metals, plastic foils, and metal foils.
  • Allows for perpendicular or inclined sensor mounting relative to the sheet plane.
  • Programmable functionalities for adaptable performance.
  • Equipped with 3 PNP (normally-closed) switch outputs.
  • Housed in a compact M18 nickel-plated brass casing.

Reliable double sheet detection across a very wide range of materials (10 g/m² up to over 2000 g/m²), insensitive to surface properties like printing, colors, and shine, with no teach-in required for simplified setup.

Technical Specification Matrix

ParameterValue
Sensing Range20 ... 60 mm (optimal distance: 45 mm)
Transducer Frequency395 kHz
Operating Voltage (UB)18 ... 30 V DC (ripple 10 %SS)
No-load Supply Current (I0)< 80 mA
Output Type3 switch outputs PNP, normally-closed
Rated Operational Current (Ie)3 x 100 mA (short-circuit/overload protected)
Voltage Drop (Ud)≤ 3 V
Switch-on Delay (ton)approx. 15 ms
Switch-off Delay (toff)approx. 15 ms
Protection DegreeIP67
Connection2 m, PVC cable (0.14 mm² core cross-section)
Housing MaterialNickel-plated brass, PBT plastic components
Transducer MaterialEpoxy resin/hollow glass sphere mixture; polyurethane foam
Ambient Temperature0 ... 60 °C (273 ... 333 K)
Storage Temperature-40 ... 70 °C (233 ... 343 K)
Physical Weight (kg)0
Dimensions L x W x H (cm)0 x 0 x 0

Industrial Applications

1. Automated Paper Feed Control in Printing Presses

In high-speed printing operations, ensuring only a single sheet of paper is fed into the press at a time is critical to prevent machine jams, misprints, and material waste.

Problem Solved

This sensor precisely detects if no sheet, one sheet, or a double sheet is present within its 20-60mm sensing range. The 3 PNP outputs can directly interface with PLCs to stop the feed mechanism or trigger an alarm upon double-sheet detection, protecting expensive machinery and ensuring print quality. Its insensitivity to printing and colors and ability to handle various paper weights (up to 2000 g/m²) make it ideal for diverse paper types.

PrintingPaper FeedDouble Sheet DetectionMachine ProtectionPLC IntegrationPNP Output20-60mm SensingMaterial Weight

2. Metal Sheet Separation in Stamping or Forming Lines

In metal fabrication, particularly with thin sheet metals, ensuring that only one sheet is picked by robotic arms or fed into a stamping machine is crucial for preventing die damage and product defects.

Problem Solved

The sensor's ability to reliably detect single or double sheets of even thin metals and foils (up to 2000 g/m²) provides a robust solution. The IP67 rating ensures it can withstand typical industrial environments with dust or lubricants. Its 18-30V DC operation is standard for industrial automation, allowing easy integration into existing control systems to halt operations if multiple sheets are present.

Metal FabricationStampingSheet MetalDouble Sheet PreventionIP67Industrial AutomationRobotic Pick-and-PlacePNP Output

3. Automated Quality Control in Packaging Lines

Packaging lines often involve folding and sealing cardboard or other flexible materials. Detecting if multiple layers are incorrectly stacked or if a sheet is missing before critical processing steps can prevent defective products.

Problem Solved

The sensor can monitor the thickness of packaging material (e.g., cardboard, plastic foils) within its optimal 20-60mm range to ensure consistency. Its insensitivity to colors and printing is beneficial for varied packaging designs. The quick response time (approx. 15ms) allows for high-speed line integration, and its programmable nature allows for fine-tuning to different material specifications.

Packaging AutomationQuality ControlMaterial ThicknessCardboardPlastic FoilsHigh-Speed ProductionProgrammablePNP Output
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