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Brand: SICK
SICK WTB26P-3B111120ZZZ W26 Background Suppression Sensor
Description
WTB26P-3B111120ZZZ is a SICK W26 photoelectric proximity sensor (part no. 1222816) that detects objects up to a set distance and ignores whatever lies behind that distance. The catalogue summary lists: sensing range min. / max.: 30 mm / 1,600 mm; functional principle: Photoelectric proximity sensor; functional principle detail: Background suppression; switching output: Push-pull: PNP/NPN; switching mode: Light/dark switching.
WTB26P-3B111120ZZZ: function, principle and typical use
The sensor needs a clear optical path. Light switching and dark switching refer to whether the output is active when an object is present or absent.
Many versions in the family provide both on separate pins or by a selector, and the table shows what this exact type does. After the setting has been made, a locked or protected adjustment avoids accidental changes by passing staff.
Technical specifications
| Parameter | Specification |
|---|---|
| Type code | WTB26P-3B111120ZZZ |
| Part number | 1222816 |
| Product family | W26 |
| Functional principle | Photoelectric proximity sensor |
| Functional principle detail | Background suppression |
| Sensing range: Sensing range min. | 30 mm |
| Sensing range: Sensing range max. | 1,600 mm |
| Sensing range: Adjustable switching threshold for background suppression | 180 mm … 1,600 mm |
| Sensing range: Reference object | Object with 90% remission factor (complies with standard white according to DIN 5033) |
| Sensing range: Minimum distance between set sensing range and background (black 6% / white 90%) | 40 mm, at a distance of 600 mm |
| Sensing range: Recommended sensing range for the best performance | 200 mm … 600 mm |
| Emitted beam: Light source | PinPoint LED |
| Emitted beam: Type of light | Visible red light |
| Emitted beam: Shape of light spot | Point-shaped |
| Emitted beam: Light spot size (distance) | Ø 7 mm (700 mm) |
| Emitted beam: Maximum dispersion of the emitted beam around the standardized transmission axis (squint angle) | < +/- 1.0° (at TU = +23 °C) |
| Key LED figures: Normative reference | EN 62471:2008-09 | IEC 62471:2006, modified |
| Key LED figures: LED risk group marking | Free group |
| Key LED figures: Wave length | 635 nm |
| Key LED figures: Average service life | 100,000 h at Ta = +25 °C |
| Adjustment: Teach-Turn adjustment | BluePilot; For setting the sensing range |
| MTTFD | 626 years |
| DCavg | 0 % |
| Supply voltage UB | 10 V DC … 30 V DC |
| Usage category | DC-12 (According to EN 60947-5-2); DC-13 (According to EN 60947-5-2) |
| Current consumption | ≤ 30 mA, without load. At UB = 24 V; |
| Digital output: Number | 2 (Complementary) |
| Digital output: Type | Push-pull: PNP/NPN |
| Digital output: Switching mode | Light/dark switching |
| Digital output: Signal voltage PNP HIGH/LOW | Approx. UB-2.5 V / 0 V |
| 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 |
Selection and installation notes for WTB26P-3B111120ZZZ
On the electrical side, the data sheet gives range of 30 mm; supply of 10 V DC … 30 V DC; response time of ≤ 500 µs; frequency of 1,000 Hz; current of ≤ 30 mA, without load. At UB = 24 V;.
Before choosing the mounting position, check enclosure rating IP65 (EN 60529); wavelength 635 nm; dimensions 24.6 mm x 82.5 mm x 53.3 mm; weight approx. 80 g; light source pinPoint LED; operating temperature –40 °C … +60 °C.
A single character in the type code can change polarity or connector.
Compare the enclosure rating and operating temperature in the table with the site; washdown, outdoor and freezer applications need explicit ratings rather than assumptions.
Documents and quotation
The official SICK data sheet for WTB26P-3B111120ZZZ (part no. 1222816) is attached as a PDF. Quotations are prepared by Seven Star LLC, an independent supplier in Muscat, once you send the part number, quantity and site through the RFQ form. Browse more in Sensors & Transmitters. Compare the complete type code with your existing unit and controller before ordering; the data sheet prevails if it differs from this page.
Datasheets & Documents
- Datasheet SICK WTB26P-3B111120ZZZ official data sheet (part no. 1222816) Download
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About brand
SICK is the German maker of industrial sensors: photoelectric and proximity sensors, safety laser scanners and light curtains, encoders, distance sensors, code readers and gas analysers. Erwin Sick, an optics engineer, founded it in Munich in 1946, and in 1952 it introduced its first marketable accident-prevention light curtain, which protected press operators by stopping the machine when a hand broke the light beam. The company moved to Waldkirch in the Black Forest in 1956 and is still headquartered there. It is a privately held company, and has been an Aktiengesellschaft (AG) since 1996.
SICK company profile
| Founded | 1946, Munich, Germany, by Erwin Sick (1909–1988) |
|---|---|
| Headquarters | Waldkirch, Baden-Württemberg, Germany (since 1956) |
| Ownership | Privately held; after the founder's death in 1988 his widow Gisela Sick became the main shareholder. Legal form SICK AG since 1996 |
| Size | More than 12,000 employees and group revenue of about EUR 2.3 billion (company figures for 2023) |
| First breakthrough | Accident-prevention light curtain for presses, shown in Hanover in 1952 |
| International growth | First foreign subsidiary in France in 1972, United States in 1976; today sales and service companies worldwide |
| Product families | Photoelectric, inductive, capacitive, magnetic and ultrasonic sensors; safety laser scanners, light curtains, safety controllers and relays; encoders and motor feedback systems; distance sensors and LiDAR; barcode and 2D code readers and machine vision; gas analysers, dust and flow measurement for process and emissions monitoring |
Milestones
- 1946: Erwin Sick receives a licence to run his engineering firm in Munich.
- 1952: The first marketable accident-prevention light curtain is presented in Hanover and goes into series production.
- 1956: The company moves to Waldkirch with 25 employees.
- 1972 and 1976: Subsidiaries are founded in France and the United States.
- 1996: SICK becomes an Aktiengesellschaft.
- Today: Sensors for factory and logistics automation, machine safety and process analysis, with a large share of revenue outside Germany.
Choosing a SICK sensor
For object detection, the sensing principle comes first. A retro-reflective sensor (WL series) sends light to a reflector and switches when an object breaks the beam; it is reliable over long distances and easy to align. A sensor with background suppression (WTB series) detects an object at a set distance and ignores what is behind it, which suits conveyors with shiny or dark backgrounds. A through-beam pair (WS/WE) gives the longest range and the highest reliability in dust. For transparent bottles and film, use a model built for transparent objects (for example WL12G-3B or WL150-P420). The digits in the code also matter: "P" usually means a PNP output and "N" NPN, and the last digits set the connector or cable. For machine guarding, a safety laser scanner such as nanoScan3 or microScan3 protects an area, while a safety controller such as Flexi Soft combines several safety devices.
Where SICK products are used
In Oman and the GCC, SICK sensors are used in packaging and bottling lines, food and beverage plants, logistics and airport baggage handling, cement and steel plants, ports and cranes, automated warehouses, and on machines built by European OEMs. SICK safety scanners guard robots and automated guided vehicles, and its encoders give position feedback on motors, hoists and conveyors.
SICK products we list
| Family | Examples |
|---|---|
| Photoelectric sensors | WL12-3P2431, WTB12-3P2431, GTB6-P4211, VL18-4P3240, WL12G-3B2531, WS/WE100, KT5W contrast, W26 IO-Link |
| Proximity, cylinder and ultrasonic sensors | IME12-08NPSZC0S, IME18-05BPSZC0S, MZT8, UM18 4-20 mA, UM30, UFN3 fork |
| Machine safety | nanoScan3, microScan3, S300 Professional, Flexi Soft FX3-CPU1, FX3-XTIO, ReLy OSSD |
| Encoders and motor feedback | DFS60B, AFM60 PROFINET, AFS60 SSI, ATM60 PROFIBUS, SRS50, EFS50 |
| Distance sensors and code readers | DT50, DL50, DT35, Lector632 |
Ordering SICK products: what we need
Send the type code and the 7-digit SICK part number from the label (for example WTB12-3P2431 together with its part number). For a replacement sensor, add the output (PNP or NPN), connection (M8, M12 or cable) and sensing distance. For encoders, add the interface (incremental, SSI, PROFIBUS, PROFINET), resolution and shaft type. For safety scanners, tell us the model and whether the existing configuration needs to be kept.
Facts checked against SICK's published company history and annual figures, October 2026.
Browse SICK products by category: Sensors & Transmitters.
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Frequently Asked Questions
What is the SICK WTB26P-3B111120ZZZ?
It is a SICK background suppression sensor (W26), part no. 1222816. The catalogue summary reads: Sensing range min. / max.: 30 mm / 1,600 mm; Functional principle: Photoelectric proximity sensor; Functional principle detail: Background suppression; Switching output: Push-pull: PNP/NPN.
What supply does the WTB26P-3B111120ZZZ need?
Supply voltage is 10 V DC ... 30 V DC. Check the output and interface rows in the table for the signal levels.
What protection rating and temperature range are given?
Enclosure rating: IP65 (EN 60529). Ambient operating temperature: –40 °C ... +60 °C. Confirm both against the site before ordering.
Does the page include the data sheet?
Yes. The official SICK data sheet for part no. 1222816 is attached as a PDF and linked on this page; where it differs from the page text, the data sheet applies.
What should be confirmed before ordering the WTB26P-3B111120ZZZ?
Compare the full type code and part number 1222816 with the device being replaced, check supply, output or interface and mounting, and send the details through the RFQ form. Seven Star LLC is an independent supplier, not a SICK partner.
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