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Brand: SICK
SICK WL34-B430 W34 Retro-Reflective Sensor
Description
WL34-B430 is a SICK W34 retro-reflective photoelectric sensor (part no. 1019245) that sends a light beam to a reflector and switches when an object interrupts it. The catalogue summary lists: functional principle: Photoelectric retro-reflective sensor; switching output: NPN, PNP; switching mode: Light switching, Dark switching; connection type: Male connector M12, 4-pin; light source: LED.
WL34-B430: function, principle and typical use
A retro-reflective sensor contains sender and receiver in one housing and uses a reflector on the opposite side of the path. Only one electrical connection is needed, which saves cabling compared with a through-beam pair.
A triple reflector returns the light to the sensor even when it is not perfectly aligned, and the sensing range in the table depends on the reflector type used for the measurement, so a smaller reflector or a dirty one shortens the usable range. Polarisation filters in the sensor allow shiny objects to be detected: a mirror-like surface reflects light without rotating its polarisation, so it is not mistaken for the reflector.
Technical specifications
| Parameter | Specification |
|---|---|
| Type code | WL34-B430 |
| Part number | 1019245 |
| Product family | W34 |
| Functional principle | Photoelectric retro-reflective sensor |
| Functional principle detail | With minimum distance to reflector (dual lens system) |
| Dimensions (W x H x D) | 27 mm x 92 mm x 70 mm |
| Housing design (light emission) | Rectangular |
| Sensing range max. | 0.03 m … 22 m |
| Sensing range | 0.03 m … 15 m |
| Light source | LED |
| Light spot size (distance) | Ø 250 mm (15 m) |
| Adjustment | Potentiometer |
| Supply voltage UB | 10 V DC … 30 V DC |
| Current consumption | 50 mA |
| Switching output | NPN, PNP |
| Switching mode | Light switching, Dark switching |
| Switching mode selector | Selectable via PNP/NPN selector, selectable via light/dark selector |
| Output current Imax. | ≤ 100 mA |
| Response time | ≤ 500 µs |
| Switching frequency | 1,000 Hz |
| Connection type | Male connector M12, 4-pin |
| Circuit protection | A; C; D |
| Weight | 140 g |
| Polarizing filter | Yes |
| Housing material | Plastic, ABS |
| Enclosure rating | IP67 |
| Test input sender off | TE to 0 V |
| Ambient operating temperature | –40 °C … +60 °C |
| Ambient temperature, storage | –40 °C … +75 °C |
| MTTFD | 834 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; cULus certificate; Photobiological safety (DIN EN 62471) certificate |
Selection and installation notes for WL34-B430
Electrically and for the interface, the listed values are connection male connector M12, 4-pin; frequency 1,000 Hz; range 0.03 m … 22 m; response time ≤ 500 µs; supply 10 V DC … 30 V DC; outputs NPN, PNP; current 50 mA.
Mechanical and environmental data for this type: weight: 140 g; enclosure rating: IP67; housing: plastic, ABS; dimensions: 27 mm x 92 mm x 70 mm; light source: visible red light; wavelength: 660 nm; operating temperature: –40 °C … +60 °C.
Before ordering, confirm the reflector (it is normally ordered separately), the maximum range with that reflector, the output type and polarity, the connection and the housing.
Typical uses are detection of boxes and containers on conveyors, door and gate monitoring, pallet and vehicle presence, and counting in packaging machines.
Related SICK products: SICK WL4SL-3P2232 W4 Retro-Reflective Sensor, SICK WL4SLG-3P5254H W4 Retro-Reflective Sensor, SICK WL12G-3V2572 Retro-Reflective Sensor, SICK WL12L-2B530 Laser Retro-Reflective Sensor, 18 m, SICK GL6G-P4211 Retro-Reflective Sensor and SICK WL150-P430 Miniature Retro-Reflective Sensor, 2 m.
Documents and quotation
The official SICK data sheet for WL34-B430 (part no. 1019245) 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 WL34-B430 official data sheet (part no. 1019245) 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 WL34-B430?
It is a SICK retro-reflective sensor (W34), part no. 1019245. The catalogue summary reads: Functional principle: Photoelectric retro-reflective sensor; Switching output: NPN, PNP; Switching mode: Light switching, Dark switching; Connection type: Male connector M12, 4-pin.
What supply does the WL34-B430 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: IP67. 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. 1019245 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 WL34-B430?
Compare the full type code and part number 1019245 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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