Name: Pepperl+Fuchs UDC-18GM50-255-3E1 Double Sheet Sensor - INOSAKI
SKU: PEPPERL-FUCHS-UDC-18GM50-255-3E1
Price: 632.64 USD
Availability: InStock

Technical Overview

Ultrasonic double-sheet sensor for no, single, or double sheet detection across 10-2000 g/m² materials. Features 3 NPN outputs, IP67, 18-30V DC.

Key Features

Ultrasonic system for reliable detection of no, one, or two overlapping sheet materials.
Short version, compact M18 housing.
No teach-in required, simplifying setup.
Function indicators visible from all directions (Green, Yellow, Red LEDs).
Insensitive to printing, colors, and shining surfaces.
Detects material weight from 10 g/m² up to over 2000 g/m².
Wide material spectrum: finest papers, thin sheet metals, plastic, and metal foils.
Perpendicular or inclined sensor mounting possible.
Programmable via function input.
3 NPN, NC switch outputs, short-circuit/overload protected.
IP67 degree of protection.
Operating voltage 18-30 V DC.

Technical Specification Matrix

Parameter	Value
Sensing range	20 ... 60 mm, optimal distance: 45 mm
Transducer frequency	255 kHz
LED green indication	single sheet detected
LED yellow indication	no sheet detected (Air)
LED red indication	double sheet detected
Operating voltage (UB)	18 ... 30 V DC, ripple 10%ss
No-load supply current (lo)	< 50 mA
Time delay before availability (tv)	< 500 ms
Input type	Function input (0-level: -UB ... -UB + 1V, 1-level: +UB - 1 V... +UB)
Pulse length	≥ 100 ms
Impedance	≥ 4 kΩ
Output type	3 switch outputs NPN, NC
Rated operating current (le)	3 x 100 mA, short-circuit/overload protected
Voltage drop (Ud)	<3 V
Switch-on delay (ton)	approx. 15 ms (shorter response time on request)
Switch-off delay (toff)	approx. 15 ms (shorter response time on request)
Pulse extension	min. 120 ms programmable
Standard conformity	EN IEC 60947-5-2:2020, IEC 60947-5-2:2019
UL approval	cULus Listed, General Purpose, Class 2 Power Source
CCC approval	CCC approval / marking not required for products rated ≤36 V
Ambient temperature	0 ... 60 °C (32 ... 140 °F)
Storage temperature	-40 ... 85 °C (-40 ... 185 °F)
Connection type	cable PVC, 2 m
Core cross section	0.14 mm²
Degree of protection	IP67
Housing material	nickel plated brass; plastic components: PBT
Transducer material	epoxy resin/hollow glass sphere mixture; polyurethane foam
Length	50 mm
Diameter	18 mm
Physical Weight (kg)	0.14
Dimensions L x W x H (cm)	5 x 1.8 x 1.8

Industrial Applications

1. High-Speed Sheet Feeder Double Feed Prevention

In high-speed printing presses or packaging machinery, accurately feeding a single sheet is crucial. Double feeds lead to jams, misprints, and costly downtime. The sensor monitors the paper path.

Problem Solved

Prevents double feeding of paper, cardboard, or thin plastic sheets in automated feeders, ensuring smooth operation and preventing machinery damage. The UDC-18GM50-255-3E1's ability to distinguish between single and double sheets, its 255 kHz transducer frequency for rapid detection, and sensitivity to materials from 10 g/m² up to 2000 g/m² makes it ideal for handling diverse media in a high-speed environment.

Sheet separationpaper feederpackaging lineprint qualityjam preventionultrasonic sensingNPN output

2. Metal Sheet Stamping Machine Protection

In automotive stamping operations, feeding multiple metal sheets into a press can severely damage tooling and the press itself. This sensor ensures only a single metal blank is presented for stamping.

Problem Solved

Protects expensive stamping dies and machinery from damage caused by double-fed thin metal sheets. The sensor's robust M18 nickel-plated brass housing, IP67 protection, and capability to detect thin sheet metals (including material weights up to 2000 g/m²) provide reliability in harsh industrial settings. Its 18-30 V DC operation integrates well with existing industrial control systems.

Sheet metal detectionpress protectiontooling safetymaterial handlingNPN outputsindustrial automationIP67

3. Non-Woven Fabric Layer Control

In manufacturing processes involving non-woven fabrics, textiles, or specialized foils, maintaining precise layer counts for lamination or cutting is essential for product quality. The sensor can differentiate between single, double, or no layers.

Problem Solved

Ensures correct layering of non-woven fabrics or foils in multi-layer production lines, preventing material waste and ensuring product integrity. The sensor's ability to detect a very wide material spectrum, including plastics and foils, and its programmable nature (with 4 distinct programs for different material types) allows for precise adjustment to various textile densities and thicknesses. The 20-60mm sensing range and 45mm optimal distance provides flexibility in setup.

Fabric layeringmaterial thickness controlnon-woven productionquality assuranceultrasonic double-sheetprogrammable sensorplastic foil detection