Items : %s%s
Photoelectric Sensors
Body Material
- ABS
- ABS, Plastic
- ABS, Polycarbonate
- Brass
- PBT
- PBT, Polybutylene
- PBT, Polyester
- PBT, Polyester, Thermoplastic
- Polybutylene
- Polycarbonate
- Polyester, Thermoplastic
- Polyethylene
- Stainless Steel
- Zinc
Contact Material
- Brass
Dielectric Material
- ALUMINUM (WET)
- CERAMIC
ECCN Code
- EAR99
Factory Lead Time
- 10 Weeks
- 11 Weeks
- 12 Weeks
- 13 Weeks
- 14 Weeks
- 15 Weeks
- 16 Weeks
- 17 Weeks
- 19 Weeks
- 2 Weeks
- 20 Weeks
- 21 Weeks
- 25 Weeks
- 3 Weeks
- 4 Weeks
- 40 Weeks
- 43 Weeks
- 44 Weeks
- 5 Weeks
- 50 Weeks
- 51 Weeks
- 59 Weeks
- 6 Weeks
- 65 Weeks
- 66 Weeks
- 7 Weeks
- 8 Weeks
- 9 Weeks
Housing Material
- ABS
- Acrylonitril Butadiene Styrene
- Acrylonitrile Butadiene Styrene
- Aluminium
- Brass
- Metal
- Nickel
- PBT
- PC
- PE
- PET
- Plastic
- Polyalylate
- Polybutylene
- POLYBUTYLENE TEREPHTHALATE
- Polycarbonate
- Polyester
- POLYETHYLENE
- PVC
- Resin
- Stainless Steel
- Thermoplastic
- Zinc
Insulation Material
- POLYBUTYLENE TEREPHTHALATE
JESD-609 Code
- e3
Material
- PBT
- PBT, Polyester, Thermoplastic
- Plastic
- Polybutylene
- Polyethylene
Moisture Sensitivity Level (MSL)
- 1 (Unlimited)
- Not Applicable
Mount
- Base
- Brackets
- Brackets, Desktop
- Brackets, DIN Rail
- Brackets, DIN Rail, Horizontal
- Brackets, DIN Rail, Vertical
- Brackets, Flush, Screw
- Brackets, Horizontal, Panel, Screw
- Brackets, Horizontal, Screw
- Brackets, Panel
- Brackets, Panel, Screw
- Brackets, Panel, Screw, Vertical
- Brackets, Screw
- Brackets, Screw, Vertical
- Brackets, Vertical
- Cable
- Cable, Through Hole
- Chassis Mount, Screw
- Desktop
- DIN Rail
- External
- Flanges
- Flanges, Through Hole
- Front
- Hardware
- Horizontal, Screw
- Panel
- Panel, Snap in
- PCB
- PCB, Screw
- Plug-In
- Screw
- Screw, Vertical
- Slot
- Snap in
- Socket
- Standard
- Surface Mount
- Through Hole
- Vertical
- Wire
Mounting Feature
- BOARD MOUNT
- CHASSIS MOUNT
- PANEL MOUNT
- SURFACE MOUNT
Mounting Style
- RIGHT ANGLE
Mounting Type
- BOARD
Number of Pins
- 11
- 12
- 16
- 2
- 3
- 37
- 4
- 5
- 6
Number of Terminations
- 17
- 2
- 20
- 9
Operating Temperature
- -10°C~40°C
- -10°C~45°C
- -10°C~45°C TA
- -10°C~50°C
- -10°C~50°C TA
- -10°C~55°C
- -10°C~55°C TA
- -10°C~60°C
- -10°C~65°C
- -10°C~70°C
- -20°C~50°C
- -20°C~50°C TA
- -20°C~55°C
- -20°C~55°C TA
- -20°C~60°C
- -20°C~60°C TA
- -20°C~70°C
- -20°C~75°C
- -20°C~80°C
- -20°C~85°C
- -25°C~50°C
- -25°C~50°C TA
- -25°C~55°C
- -25°C~55°C TA
- -25°C~60°C
- -25°C~60°C TA
- -25°C~65°C
- -25°C~70°C
- -30°C~50°C
- -30°C~55°C
- -30°C~55°C TA
- -30°C~60°C
- -30°C~60°C TA
- -30°C~70°C
- -30°C~70°C TA
- -35°C~50°C
- -35°C~50°C TA
- -40°C~125°C
- -40°C~50°C
- -40°C~55°C
- -40°C~60°C
- -40°C~60°C TA
- -40°C~65°C
- -40°C~65°C TA
- -40°C~70°C
- -40°C~70°C TA
- -40°C~85°C
- -55°C~80°C
- -5°C~55°C
- -60°C~200°C
- 0°C~40°C
- 0°C~45°C
- 0°C~50°C
- 0°C~55°C
- 0°C~60°C
- 0°C~70°C
- 0°C~75°C
- 249°C
- 25°C~70°C
- 70°C
- 85°C
Package / Case
- 062
- 100
- 120
- 125
- 200
- 300
- 600
- Axial
- Metal
- Module
- PDIP
- Radial
- SOIC
Packaging
- Bulk
- Tape & Reel (TR)
- Tape and Reel
Part Status
- Active
- Obsolete
- Unconfirmed
Pbfree Code
- yes
Published
- 1997
- 1998
- 1999
- 2000
- 2001
- 2002
- 2003
- 2004
- 2005
- 2006
- 2007
- 2008
- 2009
- 2010
- 2011
- 2012
- 2013
- 2014
- 2015
- 2016
- 2017
- 2018
Series
- 10
- 120254 Contrinex
- BAT2S
- BT1
- BT2
- BTA2
- CX-400
- CY
- CY-100
- D10
- D12
- DS18
- E32
- E3AS-F
- E3AS-L
- E3C
- E3F2
- E3F3
- E3FA
- E3FB
- E3FR
- E3FZ
- E3G
- E3H2
- E3HC
- E3HF
- E3HQ
- E3HT
- E3JK
- E3JM
- E3JU
- E3L
- E3RA
- E3RB
- E3S
- E3S-A
- E3S-B
- E3S-C
- E3S-CL
- E3S-LS
- E3S-R
- E3S-VS
- E3T
- E3Z
- E3Z-B
- E3Z-G
- E3ZM
- E3ZM-B
- E3ZM-C
- ELF3
- ELF4
- EQ-30
- EQ-500
- EX
- EX-10
- EX-20
- EX-30
- EX-40
- EX-L200
- EX-Z
- EX4
- FX-300
- FX-301
- FX-410
- FX-500
- FZ-10
- G10
- G6
- GR18
- GR18S
- HG-C
- HG-C1000L
- HG-T
- HL-C1
- HL-C2
- HL-G1
- HL-T1
- IAT2
- ISD400
- IT2
- K50
- KT3
- KT5
- KT8
- KTM Core
- KTM Prime
- KTS Prime
- LD
- LL3
- LS
- LS-500
- LS10
- LX
- LX-100
- MHF15
- MIAD9
- MINI-BEAM®
- MLS
- MOF
- MQ-W
- NA2-N
- NA40
- NX5
- PA
- PBT2
- PBT4
- PC
- PD
- PE
- PH
- Photologic®
- PIAT4
- PIT4
- PM2
- PMT
- PowerProx
- PS-F
- PS-L
- PS-M
- PS-R
- PTL110S
- PVA
- PVD
- PX
- Q12
- Q14
- Q20
- Q25
- Q3X
- Q40
- Q45
- Q4X
- Q60
- Q85
- QS18
- QS30
- QT50
- R55F
- R58E
- RT-610
- RX
- S18
- S18-2
- S30SP
- SA1E
- SA1U
- SH
- SL30
- SLM
- SLO
- SM30
- SME312
- ST4
- SureSense
- T18
- T18-2
- T30
- T8
- TH
- TM18
- VF
- VS2
- VTB
- W12 Teflon
- W12-2 Laser
- W12-3
- W12G
- W16
- W2 Flat
- W26
- W27-2 Laser
- W27-3
- W27-3 Ex
- W2S-2
- W2SG-2
- W4-3
- W4-3 Glass
- W4-3 PTFE
- W4S-3
- W4S-3 Glass
- W4S-3 Inox
- W4S-3 Inox Glass
- W4S-3 Inox Hygiene
- W4S-3 Inox Hygiene Glass
- W4SL-3
- W4SL-3H
- W4SL-3V
- W4SLG-3
- W4SLG-3H
- W4SLG-3V
- W9-3
- W9-3 Glass
- W9L-3
- W9LG-3
- WL12-3
- WLL180T
- Z-Sensor
- ZW
- ZW-SQ
Shape/Size Description
- TUBULAR PACKAGE
Surface Mount
- NO
- YES
Terminal Shape
- PRINTED WIRING PIN
- SNAP-IN
- WIRE
- WRAPAROUND
Termination
- Cable
- Connector
- Plug
- Quick Connect
- Screw
- Terminal Block
- Wire
- Wire Leads
Tolerance
- 20%
- 5%
Weight
- 105g
- 109.99615g
- 110g
- 115.099064g
- 130.407806g
- 141.747616g
- 142g
- 145g
- 150g
- 19.844666g
- 20g
- 220g
- 22g
- 40g
- 59.533999g
- 59.5g
- 60g
- 65.203903g
- 65g
| Compare | Image | Name | Manufacturer | Pricing(USD) | Quantity | Weight(Kg) | Size(LxWxH) | Datasheet | Factory Lead Time | Mount | Housing Material | Packaging | Published | Series | Part Status | Moisture Sensitivity Level (MSL) | Connector Type | Termination | Max Operating Temperature | Min Operating Temperature | Operating Supply Voltage | RoHS Status | Radiation Hardening | Number of Pins | REACH SVHC | Mfr | Operating Temperature | Sensing Method | Max Supply Voltage (DC) | Min Supply Voltage (DC) | Ratings | Ingress Protection | Type | Output Type | Terminal Type | Output Current | Cable Length | Wire/Cable Type | Wire/Cable Diameter | Response Time | Sensing Distance | Output Configuration | Voltage - Supply | Light Source | Connection Method | Adjustment Type | IP Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
ZT1-P5215 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | Z-Sensor | Active | -10°C~50°C TA | Proximity | IP67, IP69K | 78.74 2m | 200μs | 0.394 (10mm) | NPN - Dark-ON/Light-ON | 10V~30V | Infrared (880nm) | Cable | Adjustable, Potentiometer | ||||||||||||||||||||||||||||
|
GTE6-P1231 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | G6 | Active | -25°C~55°C TA | Proximity | IP67 | 78.74 2m | 1.25ms | 35.433 (900mm) | PNP | 10V~30V | Red (650nm) | Cable | Adjustable | ||||||||||||||||||||||||||||
|
WTV4-3P1321 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | W4-3 | Active | -10°C~50°C TA | Proximity | IP67, IP69K | 78.74 2m | 200μs | 0.394 (10mm) | NPN - Dark-ON/Light-ON | 10V~30V | Infrared (880nm) | Cable | Adjustable, Potentiometer | ||||||||||||||||||||||||||||
|
70156-2864 | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Active | 1 (Unlimited) | Non-RoHS Compliant | |||||||||||||||||||||||||||||||||||||||
|
ZL2-F2828 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | Z-Sensor | Active | -25°C~50°C TA | Retroreflective | IP67 | 3.937 ~ 188.976 (100mm ~ 4.8m) | PNP | 10V~30V | Red (660nm) | Connector, M12 | |||||||||||||||||||||||||||||||
|
E3L-2LRC4 | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | download | E3L | Active | 1 (Unlimited) | Cable | 50°C | -10°C | RoHS Compliant | -10°C~50°C | Through-Beam | IP67 | NEMA 4; IEC 144 IP67 | 1ms | 393.701 (10m) | NPN - Dark-ON/Light-ON - Selectable | 12V~24V | Infrared (780nm) | Cable | Adjustable | |||||||||||||||||||||||
|
70156-3852 | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Active | 1 (Unlimited) | Non-RoHS Compliant | |||||||||||||||||||||||||||||||||||||||
|
WL4S-3P3132V | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | W4S-3 Inox | Active | -30°C~70°C TA | Retroreflective | IP66, IP67, IP68, IP69K | 5.906 150.00mm | 500μs | 196.850 (5m) | PNP | 10V~30V | Red (650nm) | Cable with Connector | Adjustable | ||||||||||||||||||||||||||||
 |
E3S-BT81-L | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | download | 2001 | E3S-B | Obsolete | 1 (Unlimited) | Cable | 55°C | -25°C | RoHS Compliant | No | -25°C~55°C | Through-Beam | IP67 | NEMA 4X, 6; IEC 144 IP67 | 500μs | 78.740 (2m) | 12V~24V | Red (700nm) | Cable | Adjustable, 3/4-Turn Potentiometer | ||||||||||||||||||||||
|
QH23SP6CV50 | Banner Engineering Corporation | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | ||||||||||||||||||||||||||||||||||||||||||
|
70156-2586 | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Active | 1 (Unlimited) | Non-RoHS Compliant | |||||||||||||||||||||||||||||||||||||||
|
70156-3587 | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Active | 1 (Unlimited) | Non-RoHS Compliant | |||||||||||||||||||||||||||||||||||||||
|
XUPK2PANJ45 | Schneider Electric | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | - | Schneider Electric | -10°C ~ 60°C | Reflective, Diffuse | - | - | 200ms | 5.906" (150mm), 23.622" (600mm) | PNP-NO | 12V ~ 24V | Green LED | Connector, RJ45 | Adjustable | |||||||||||||||||||||||||||||
 |
CX-441-Z | Panasonic Industrial Automation Sales | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 8 Weeks | PBT | 2010 | CX-400 | Active | 1 (Unlimited) | Connector | Cable | 55°C | -25°C | RoHS Compliant | 4 | -25°C~55°C | Reflective | IP67 | IP67 | 1ms | 3.937 (100mm) | NPN - Open Collector | 12V~24V | Red LED | Connector, M8, 4POS | ||||||||||||||||||||
|
Q45BB6FV | Banner Engineering Corporation | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Q45 | Banner Engineering Corporation | -40°C ~ 70°C | Fiber Optic | NEMA 6P, IEC IP67 | 78.74" (2m) | 2ms | - | NPN/PNP - Dark-ON/Light-ON - Selectable | 10V ~ 30V | Red (650nm) | Cable | Adjustable, Potentiometer | |||||||||||||||||||||||||||||
|
XPDV2150R-VM-SP | Finisar Corporation | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | download | 6 Weeks | Bulk | Active | 1 (Unlimited) | 3.3V | RoHS Compliant | No | 2 | 0°C~75°C | Photodetector | 2.8V~3.8V | Cable with Connector | |||||||||||||||||||||||||||||
|
WTT12L-B1566 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | PowerProx | Active | -35°C~50°C TA | Proximity | IP67 | 78.74 2m | 5ms | 1.969 ~ 149.606 (50mm ~ 3.8m) | NPN/PNP | 10V~30V | Red Laser Diode (658nm) | Cable | Adjustable, 4-Turn Potentiometer | ||||||||||||||||||||||||||||
|
GRSE18-P2442 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | GR18 | Active | Not Applicable | -25°C~55°C TA | Through-Beam | IP67 | 500μs | 590.551 (15m) | PNP | 10V~30V | Red (650nm) | Connector, M12 | Adjustable, Potentiometer | ||||||||||||||||||||||||||||
|
XUB0APSNM12 | Schneider Electric | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | - | Schneider Electric | -25°C ~ 55°C | Reflective | IP65 | - | 2ms | 787.402" (20m) | PNP-NC/NO | 12V ~ 24V | Yellow LED | Connector, M12 | - | |||||||||||||||||||||||||||||
 |
PH18CNT20NASA | Carlo Gavazzi Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | download | 6 Weeks | Through Hole | ABS | 2012 | PH | Active | Not Applicable | RoHS Compliant | 4 | No SVHC | -25°C~60°C | Through-Beam | 30V | 10V | IP66 | IP67, IP69K | 100mA | 78.74 2m | 1ms | 787.402 (20m) | NPN | 10V~30V | Infrared (850nm) | Cable | Adjustable, 210° Turn Potentiometer | ||||||||||||||||
 |
VTBP6GRQ | Banner Engineering Corporation | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | VTB | Active | 1 (Unlimited) | ROHS3 Compliant | -20°C~50°C | NEMA 1, 3, 4, 4X, 12, 13 IEC IP66 | 100ms | PNP | 12V~30V | Connector | ||||||||||||||||||||||||||||||||
 |
E3TSL232M | Omron | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | download | Polybutylene Terephthalate | Active | RoHS Compliant | Limited Reflective | PNP | Pre-Wired | Red LED | IP67 | |||||||||||||||||||||||||||||||||
 |
PIT46U | Banner Engineering Corporation | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Cable | 2003 | PIT4 | Active | 1 (Unlimited) | Threaded | ROHS3 Compliant | No SVHC | 70°C | Through-Beam | 2m | Individual | 1.016 mm | |||||||||||||||||||||||||||||
|
70156-3248 | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Active | 1 (Unlimited) | Non-RoHS Compliant | |||||||||||||||||||||||||||||||||||||||
|
T18-2VNLPC-Q8 | Banner Engineering Corporation | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | T18-2 | Banner Engineering Corporation | -40°C ~ 70°C | Retroreflective, Polarized | NEMA 6P, IEC IP67, IEC IP68, IEC IP69 | - | 1.5ms, 750μs | 236.220" (6m) | NPN - Dark-ON/Light-ON - Selectable | 10V ~ 30V | Red LED | Connector | Adjustable, Potentiometer | |||||||||||||||||||||||||||||
 |
CY-121VB-P-Z | Panasonic Industrial Automation Sales | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 8 Weeks | CY-100 | Active | 1 (Unlimited) | RoHS Compliant | -25°C~55°C | Reflective, Diffuse | IP67 | 1ms | 3.937 (100mm) | PNP - Open Collector | 12V~24V | Infrared | Connector, M12, 4POS | ||||||||||||||||||||||||||||
|
GRSE18S-P1147 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | GR18S | Active | Not Applicable | -25°C~55°C TA | Through-Beam | IP67 | 78.74 2m | 500μs | 393.701 (10m) | PNP | 10V~30V | Red (650nm) | Cable | Adjustable, Potentiometer | |||||||||||||||||||||||||||
|
WL4-3N1310S25 | SICK, Inc. | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 3 Weeks | W4-3 | Active | -40°C~60°C TA | Retroreflective | IP67 | 500μs | 15.748 ~ 137.795 (400mm ~ 3.5m) | NPN | 10V~30V | Infrared (880nm) | Cable | ||||||||||||||||||||||||||||||
|
70156-1383 | Omron Automation and Safety | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | Active | 1 (Unlimited) | Non-RoHS Compliant | |||||||||||||||||||||||||||||||||||||||
 |
CX-481-Z | Panasonic Industrial Automation Sales | 0.0000 |
Min: 1 Mult: 1 |
0.00000000 | 8 Weeks | 2010 | CX-400 | Active | 1 (Unlimited) | Connector | 55°C | -25°C | RoHS Compliant | 4 | -25°C~55°C | Retroreflective | IP67 | IP67 | 1ms | 19.685 (500mm) | NPN - Open Collector | 12V~24V | Infrared | Connector, M8, 4POS |
-
ZT1-P5215 SICK, Inc.
10V~30V Z-Sensor Series Adjustable, Potentiometer Proximity -10°C~50°C TA
Price: 0.0000
RFQ -
-
WTV4-3P1321 SICK, Inc.
10V~30V W4-3 Series Adjustable, Potentiometer Proximity -10°C~50°C TA
Price: 0.0000
RFQ -
-
-
E3L-2LRC4 Omron Automation and Safety
12V~24V E3L Series Adjustable Through-Beam Cable -10°C~50°C
Price: 0.0000
RFQ -
70156-3852 Omron Automation and Safety
70156-3852 datasheet pdf and Optical Sensors - Photoelectric, Industrial product details from Omron Automation and Safety stock available at HK JDW
Price: 0.0000
RFQ -
WL4S-3P3132V SICK, Inc.
10V~30V W4S-3 Inox Series Adjustable Retroreflective -30°C~70°C TA
Price: 0.0000
RFQ -
E3S-BT81-L Omron Automation and Safety
12V~24V E3S-B Series Adjustable, 3/4-Turn Potentiometer Through-Beam Cable -25°C~55°C
Price: 0.0000
RFQ -
QH23SP6CV50 Banner Engineering Corporation
QH23SP6CV50 datasheet pdf and Optical Sensors - Photoelectric, Industrial product details from Banner Engineering stock available at HK JDW
Price: 0.0000
RFQ -
-
70156-3587 Omron Automation and Safety
70156-3587 datasheet pdf and Optical Sensors - Photoelectric, Industrial product details from Omron Automation and Safety stock available at HK JDW
Price: 0.0000
RFQ -
-
CX-441-Z Panasonic Industrial Automation Sales
12V~24V CX-400 Series Reflective Connector 4-Pin -25°C~55°C
Price: 0.0000
RFQ -
-
-
WTT12L-B1566 SICK, Inc.
10V~30V PowerProx Series Adjustable, 4-Turn Potentiometer Proximity -35°C~50°C TA
Price: 0.0000
RFQ -
GRSE18-P2442 SICK, Inc.
10V~30V GR18 Series Adjustable, Potentiometer Through-Beam -25°C~55°C TA
Price: 0.0000
RFQ -
-
PH18CNT20NASA Carlo Gavazzi Inc.
10V~30V PH Series Adjustable, 210° Turn Potentiometer Through-Beam 4-Pin -25°C~60°C
Price: 0.0000
RFQ -
-
-
-
-
-
CY-121VB-P-Z Panasonic Industrial Automation Sales
12V~24V CY-100 Series Reflective, Diffuse -25°C~55°C
Price: 0.0000
RFQ -
GRSE18S-P1147 SICK, Inc.
10V~30V GR18S Series Adjustable, Potentiometer Through-Beam -25°C~55°C TA
Price: 0.0000
RFQ -
-
-
CX-481-Z Panasonic Industrial Automation Sales
12V~24V CX-400 Series Retroreflective Connector 4-Pin -25°C~55°C
Price: 0.0000
RFQ
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