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Brand: SICK
SICK WTB9-3P2261 W9 Photoelectric Proximity Sensor, M8 Connector
Description
WTB9-3P2261 is a SICK W9 photoelectric proximity sensor with background suppression, ordered under part number 1049047. It switches when a target sits inside its set sensing range and does not react to surfaces behind that range, which is what makes the principle useful on conveyors, pick-up stations and machine frames where the backdrop is a wall, a guard or another product. The data sheet gives a maximum sensing range of 20 mm … 350 mm (sensing range value printed as 20 mm … 200 mm). The switching output is PNP with light/dark switching, the supply is 10 V DC … 30 V DC and the connection is Male connector M8, 4-pin.
Background suppression on the W9 housing
Mount the sensor so the product passes across the optical axis instead of approaching it head-on, otherwise the target crosses the cut-off line slowly and the output may switch late. Polished machine parts behind the product are the usual cause of false switching with this principle, so look for reflective surfaces near the cut-off line when a sensor behaves unpredictably.
On the WTB9-3P2261 the light source is PinPoint LED emitting visible red light with a spot of Ø 4.5 mm (75 mm). Adjustment method: potentiometer, 5 turns. Typical response: < 0.333 ms at 1,500 Hz switching frequency.
Technical specifications
| Parameter | Specification |
|---|---|
| Type code | WTB9-3P2261 |
| Part number | 1049047 |
| EAN | 4047084174773 |
| Product family | W9 |
| Functional principle | Photoelectric proximity sensor |
| Functional principle detail | Background suppression |
| Dimensions (W x H x D) | 12.2 mm x 49.8 mm x 23.6 mm |
| Housing design (light emission) | Rectangular |
| Mounting hole | M3 |
| Sensing range max. | 20 mm … 350 mm |
| Sensing range | 20 mm … 200 mm |
| Type of light | Visible red light |
| Light source | PinPoint LED |
| Light spot size (distance) | Ø 4.5 mm (75 mm) |
| Wave length | 650 nm |
| Adjustment | Potentiometer, 5 turns |
| Supply voltage UB | 10 V DC … 30 V DC |
| Ripple | < 5 Vpp |
| Current consumption | 30 mA |
| Switching output | PNP |
| Output function | Complementary |
| Switching mode | Light/dark switching |
| Output current Imax. | ≤ 100 mA |
| Response time | < 0.333 ms |
| Switching frequency | 1,500 Hz |
| Connection type | Male connector M8, 4-pin |
| Circuit protection | A ; B ; C |
| Protection class | III |
| Weight | 13 g |
| Housing material | Plastic, VISTAL® |
| Optics material | Plastic, PMMA |
| Enclosure rating | IP66; IP67; IP69K |
| Ambient operating temperature | –40 °C … +60 °C |
| Ambient temperature, storage | –40 °C … +75 °C |
| MTTFD | 1,030 years |
| DCavg | 0 % |
| TM (mission time) | 20 years |
| Declarations and certificates in the data sheet | EU declaration of conformity; UK declaration of conformity; ACMA declaration of conformity; Moroccan declaration of conformity; China RoHS; China Compulsory Product Certification (CCC) exempt; ECOLAB certificate; cULus certificate; Photobiological safety (DIN EN 62471) certificate |
Type code WTB9-3P2261 and part number 1049047
Catalogue numbering works like this for WTB9-3P2261: the letters give the family and principle, the digits give option details, and 1049047 is the single identifier SICK uses for this exact version. Cable, plug, range and output variants have their own numbers.
Other active types in the same SICK family, each with its own part number:
- WTB9L-3P2261 (part no. 1058230) – Light source: Laser
- WTB9M4-3P2261 (part no. 1051889)
- WTB9M4L-3P2261 (part no. 1058186) – Light source: Laser
- WTB9-3P2461 (part no. 1049049) – Connection type Detail: Male connector M12, 4-pin
- WTB9-3P3261 (part no. 1054306) – Connection type: Cable with male connector, Connection type Detail: Cable with M8 male connector, 4-pin
Mounting, wiring and set-up notes for WTB9-3P2261
The unit runs from 10 V DC … 30 V DC and carries IP66; IP67; IP69K protection; ambient temperature in operation is –40 °C … +60 °C. Current draw is 30 mA. The body measures 12.2 mm x 49.8 mm x 23.6 mm and weighs 13 g. Fix the cable so that the plug is not strained by vibration; a loose M8 or M12 connection is a common source of intermittent faults.
Documents and quotation
The SICK data sheet for WTB9-3P2261 (part no. 1049047) is attached to this page as a PDF, exactly as SICK publishes it, so you can check it against your wiring and mounting drawings. To request a price, give us the part number, the quantity and where the goods should go, using the RFQ form. Related items are listed under Sensors & Transmitters. Confirm before ordering that the version matches your installation: connection, output type and ratings. The data sheet prevails over this summary.
Datasheets & Documents
- Data Sheet SICK WTB9-3P2261 official data sheet (part no. 1049047) Download
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About brand
Machine builders have relied on SICK since 1946 for the sensors that tell a controller where a part, a pallet or a person is. The company, based in Waldkirch, Germany, makes photoelectric, inductive and magnetic sensors, distance sensors and safety devices. Seven Star LLC supplies SICK sensors to maintenance teams and integrators in Oman, mostly as exact replacements identified by type code and part number.
SICK sensor families on this page
Five of the SICK families listed here are described below. The W4 miniature photoelectric sensors include the WTB4-3, a proximity sensor with background suppression. IME is the standard inductive proximity line, and the IME18 is the M18 housing size. RZT7 cylinder sensors fit T-slot pneumatic cylinders and detect the piston magnet. The DT35 belongs to the Dx35 laser distance sensors for mid-range measurement. The microScan3 is a safety laser scanner that guards hazardous zones around machines and vehicles.
Where SICK sensors are used
SICK sensors are fitted on packaging and bottling lines, conveyors, palletizers, warehouse cranes and automated guided vehicles. Safety laser scanners protect robot cells and transfer cars. In process plants, the same proximity and cylinder sensors report valve and damper positions on packaged equipment.
Ordering SICK sensors: what we need
A SICK type code such as IME18-08NPSZW2K packs the whole specification into one string: housing size, sensing range, flush or non-flush mounting, output type and connection. Each variant also has a 7-digit part number, and that number is the safest identifier. Please send:
- Type code and part number from the sensor label, or a photo of it
- Output type (PNP or NPN, normally open or closed) and connection (cable length or M8/M12 plug)
- For microScan3: variant (Core or Pro), interface, protective field range, plus system plug and bracket
We check the code in SICK's documentation and tell you if the manufacturer lists a successor.
Browse SICK products by category: Sensors & Transmitters.
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Frequently Asked Questions
What is the sensing range of the WTB9-3P2261?
The data sheet lists a maximum sensing range of 20 mm ... 350 mm and a sensing range of 20 mm ... 200 mm.
What output and connection does the WTB9-3P2261 have?
Output: PNP, light/dark switching. Connection: Male connector M8, 4-pin.
Which supply voltage does it need?
10 V DC ... 30 V DC with a current consumption of 30 mA.
How is the sensing distance set?
Potentiometer, 5 turns.
Which part number identifies this exact variant?
Part no. 1049047, type code WTB9-3P2261. Variants with other connections or outputs have different part numbers.
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