Double Sheet Sensor

Double sheet sensor UDB-18GS-2E0-0,2M-V15

  • Ultrasonic system for reliable detection of no, one, or two overlapping sheet materials
  • Insensitive to printing, colors, and shining surfaces
  • Perpendicular or inclined sensor mounting relative to the sheet plane possible
  • Simplified commissioning
  • Integrated alignment aid
  • No TEACH-IN required
  • Short version
General specifications
Sensing range 20 ... 60 mm , optimal distance: 45 mm
Transducer frequency approx. 255 kHz
Non-volatile memory EEPROM
Write cycles 300000
Indicators/operating means
LED green indication: single sheet detected
LED yellow indication: no sheet detected (Air)
LED red indication: double sheet detected
flashing: device error
Electrical specifications
Operating voltage 18 ... 30 V DC , ripple 10 %SS
No-load supply current ≤ 40 mA
Power consumption ≤ 550 mW
Time delay before availability ≤ 300 ms
Input type Function input
0-level: -UB ... -UB + 1V
1-level: +UB - 1 V ... +UB
Pulse length ≥ 100 ms
Impedance ≥ 60 kΩ
Designation OUT 1, 2
Number 2
Output function OUT 1: single sheet detected
OUT 2: double sheet detected
Output type switching output: NPN , NO contact
Rated operating current 100 mA per output
Voltage drop ≤ 3 V
Switch-on delay 15 ms
Switch-off delay 15 ms
Fusing reverse polarity protected , overload and short-circuit resistant
Compliance with standards and directives
Standard conformity
Standards EN IEC 60947-5-2:2020
IEC 60947-5-2:2019
Approvals and certificates
UL approval cULus Listed, General Purpose, Class 2 Power Source
CCC approval CCC approval / marking not required for products rated ≤36 V
Ambient conditions
Ambient temperature 0 ... 60 °C (32 ... 140 °F)
Storage temperature -25 ... 70 °C (-13 ... 158 °F)
Mechanical specifications
Connection type fixed cable with plug
Housing length
Ultrasonic transmitter 21 mm
Ultrasonic receiver 52 mm
Housing diameter
Ultrasonic transmitter 18 mm
Ultrasonic receiver 18 mm
Degree of protection IP54
Housing Stainless steel 1.4305/AISI 303, polyamide plastic parts
Transducer epoxy resin/hollow glass sphere mixture; polyurethane foam
Threading M12 x 1
Number of pins 5
Cable diameter 4.3 mm
Bending radius 5 x diameter , fixed
Material PUR
Color black
Length approx. 200 mm
Mass 75 g
Tightening torque, fastening screws max. 20 Nm



System Classcode
ECLASS 11.0 27272801
ECLASS 10.0.1 27272801
ECLASS 9.0 27272801
ECLASS 8.0 27272801
ECLASS 5.1 27272801
ETIM 8.0 EC001847
ETIM 7.0 EC001847
ETIM 6.0 EC001847
ETIM 5.0 EC001847
UNSPSC 12.1 41111960


Details: UDB-18GS-2E0-0,2M-V15


The ultrasonic double-sheet detector is used wherever automatic differentiation between single and double sheets is necessary to protect machines or prevent rejects. The double sheet detection is based on the ultrasonic thru-beam principle.

The following situations can be detected:

  • No sheet, i. e. air
  • Single sheet
  • Double sheet or multiple sheets (a statement on the number of sheets is not possible here)

Additional information



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