The photoelectric sensors of the S2 series are enclosed in sturdy plastic housings, developed to guarantee the complete protection of the control panel and connection terminals.
The free voltage versions present a relay output, while the 10-30 Vdc versions have a double NPN and PNP output, both available with 1 or 2 m proximity, 5 m polarised retroreflex, 3 m polarised retroreflex and 10 or 50 m through beam optic functions.
The red output LED and the green stability LED are visible through the IP66 hermetically-sealed cover, that also protects the terminal block and commands, such as the sensitivity adjustment trimmer and dark/light operating mode selector.
The versions with output timing present a trimmer to regulate the time up to 16 s. and a selector to set 5 different functions.

The S20 series offers all the basic optic functions at the highest operating distances. The series presents models with 50 cm background suppression with microprocessor-based Teach-in setting or, with trimmer adjustment, 10 m polarised retroreflex, 2 m diffuse proximity and 50 m emitter-receiver optic functions.
Even with particularly compact dimensions, these sensors guarantee optimal performances, thanks to special aspherical lenses that take full advantage of the high-power LED emission, visible red in the background suppression and polarised retroreflex versions and infrared in all the other models. Both NO and NC outputs are present in the NPN or PNP versions; cable or M12 connection is available.
The connection block can be adjusted either in a straight or right angle position, in order to offer improved mounting versatility.

Thanks to a 12 m polarised retroreflex model, a 2 m diffuse proximity, a background suppression over 1 m, and a 50 m through beam couple, the S30 series is the reference for the most demanding applications.
Versions with 10-30 Vdc power supply and transistor output, or free voltage versions with relay output are foreseen; both offer also versions with the output timing function. Terminal block or M12 connector versions are available.
The housing, created in glass-fibre reinforced polycarbonate, guarantees maximum resistance.
Moreover versions with glass-front protection with active defogging system are available.

"Ex" series modules are designed for explosive areas in ignition protection Type "n" according to EN 50021. Hence, they conform to Categories 3G and 3D, based on the new 94/9/EC (ATEX) Directive, and can be used in the areas "Zone 2 (gas)" and "Zone 22 (non-conductive dust)".
In addition to limit values for temperature, performance or UV resistance, the Standard stipulates a mechanical strength which cannot be achieved with standard sensors.
The Category 3D/3G photoelectric switches from SICK are equipped with a metal housing. This housing meets the demanding requirements of the Standard and therefore offers a ready-to-fit solution in respect of the standard.

The essential requirements of a sensor in standard applications are economy and reliability. Series W11 fulfils these requirements.
All W11 sensors have visible red sender diodes as standard. This visible light spot allows the sensors to align with the object rapidly and reliably. The 4-pole M12 device plug or the 2 m cable are also included in the standard option, as well as the 800 Hz switching frequency or the shortcircuit protected switching outputs.
The WL11 UC photoelectric reflex switch probably offers todays most compact photoelectric switch with relay output.
The Series W11 sensors fulfil the test requirements of ECOLAB certifies that material resistance tests with cleaning agents and disinfectants in common use in the food-processing sector, were successfully completed.
Thanks to their reliability W11 sensors are routinely installed in typical application areas, such as the packaging industry, food and drinks, and the electronics and textile industries.

The W12-2 series of photoelectric switches is in use all over the world. The key advantage for the user is the wealth of experience gained from the previous W12 series. The W12-2 series is backed by years of know-how gained from many thousands of applications.
Further advantages:

• The Teflon-coated version for use in, for example, the beverage industry.
• IP 69K assures reliable operation even when high pressure cleaning equipment is being used.
• The Series W12-2 sensors fulfil the test requirements of ECOLAB certifies that material resistance tests with cleaning agents and disinfectants in common use in the foodprocessing sector, were successfully completed.

The W 12 L-2 series offers a complete range of photoelectric switches using innovative laser technology, contained in a rugged metal housing. Pulsed lasers are used to transmit light. Because they have in protection class 2, the machine operator does not need to take any extra safety or protective measures when using the sensors.
All the devices in this series are particularly "long-sighted".
In addition to the scanning range, the small dimensions of the light spot generated on the object is a further advantage of laser technology. This makes it possible to detect even minute items of just 0.5 mm at maximum switching frequencies of 2,500/s.
W 12 L-2 laser photoelectric switches - the best solution for millimetre precision, or even smaller!

The W23-2 series photoelectric switches are geared to applications where economic considerations are particularly important.
Easy to install and commission, they can be quickly aligned using the high visibility light spot and are ready to operate, enabling customers to "Plug and Play".
The same applies to the energetic sensor. Within seconds, and at the touch of a button, it is adjusted to an object. Finally, the photoelectric proximity switch with background blanking completes the product range and also benefits from fast adjustment. With standardised connections and two versions for 24 V DC or 240 V AC operation, the integration into machinery or systems is made easy.
The indicator LEDs on the W23-2 offer 360° allround visibility for improved convenience during set up and operation.

Overview of W23-2:

• "Plug & Play" photoelectric reflex switch,
• Energetic sensor: easyTeach-in, ready to operate in less time,
• Faster monitoring with 360°, visibility for indicator LEDs.

Typical uses:

• Storage and conveying technology,
• Woodworking machinery,
• Doors/gates,
• Applications in automation processes.

Overview of W 24-2:

• Extremely robust metal housing for harsh industrial applications with IP 69K rating,
• Very long ranges and high precision, long scanning distance,
• High insensitivity to ambient light increases reliability and availability,
• Universal supply voltage offers flexibility,
• Useful additional functions and accessories for specialist applications.

Main industries:

• Automotive industry,
• Chemical industry,
• Storage and material handling,
• Steel industry.

The W250 family of photoelectric switches features a special combination which integrates both the DC and DC/AC version in a very compact housing. The cable version or the rotatable plug version gives the W250 flexibility for system integration. During adjustments to sensitivity and scanning distance, the user is supported by an easily readable positioning display.
Overview of W250:

• Universal supply voltage (DC or DC/AC) in a compact housing simplifies integration into machines,
• Visible light beam aids adjustment,
• light-/dark-switching reduces stockholding cost by reducing the number of variant required,
• supplied complete and ready for use, as mounting brackets and reflector (WL250 only) are included in the supply.

Principal areas of application:

• Mechanical engineering,
• Timber industry,
• Storage and materials handling,
• Bottling systems,
• Door/gate access control.

The W260 series with its sensible ranges and useful technical features is superbly designed for a wide range of applications. Six different detection methods are available in one configuration, saving on mounting systems and stockholding.
Overview of W 260:

• 6 different detection systems in one configuration = standardised mounting system,
• DC/AC devices conform to EN 61000-6-3 (interference emission in "residential and commercial areas"),
• comprehensive range of fibreoptic cables covers many applications,
• universal supply voltage.

Main industries:

• Plastics technology,
• Materials handling,
• Mechanical engineering,
• Door/gate and, access control.

Variability and flexibility are the two key characteristics of the W 27-2 series of photoelectric switches. Thanks to their modular design, it is possible to offer a broad range of very different sensors. Fully welded plastic housing made of ABS and impressive performance data are features common to all devices.
The variety of models and configurations available within this photoelectric series, means that the many different requirements of users can easily be satisfied:

• plug or connecting cable,
• supply voltage with 10 . . .30 V DC/24 . . .240 V UC,
• timer modules for ON- or OFFdelay or for ON- and OFF-delay, separate adjustable,
• with test input,
• pre-failure signalling output,
• front screen heating to prevent condensation under rapidly changing ambient temperatures,
• with laser types
• AS-i technology
• Standard sensors connectable with AS-i system components.
• Intelligent sensors with integrated AS-i chip.

Overview of W27-3:

• Robust, universal all-rounder,
• Greater security against unwanted optical reflections,
• Easy Teach-in, simple and fast commissioning,
• IP69K in preparation,
• ECOLAB certifies the material resistance to cleaning agents and disinfectants in common use in the food-processing sector.

Typical uses:

• Storage and conveying technology,
• Automotive industry,
• Woodworking machinery,
• Doors/gates.

In the W 280 series of photoelectric switches, three powerful device types cover the main areas of application for door/gate and access control, as well as storage and materials handling technology. Within the three device types, both direct and universal voltage versions are available. For better alignment, all devices are equipped with visible red light. The clever detail: In the cable versions (DC and UC) the sensor can be fully separated from the back part, with the cable in the back part remaining undisturbed. The combined advantage is easy initial mounting and straightforward exchange. The devices with light-/dark switching offer application flexibility and reduce both the number of options and stockholding.

Overview of W 280

• 2 component system facilitates initial mounting and exchange,
• DC/AC devices comply with EN 61000-6-3 (interference emission in "domestic and commercial areas"),
• all complete and ready for use, as the mounting brackets and reflector (WL 280 only) are included in the supply.

Main industries:

• Door/gate and access control,
• Storage and materials handling,
• Mechanical engineering.

Overview of W 34:
Very robust housing with very good resistance to chemicals as well as IP 69K. Very long ranges and high precision, long scanning range. High insensitivity to ambient light increases the reliability. User-friendly connection concept offers fast commissioning. Useful features reduce the number of options and stockholding.
Main industries:

• Plant construction (glass production, ceramics, construction),
• Timber industry,
• Lifting and transport technology,
• Chemical industry,
• Door and gate and access control.

Overview of W45:

• Solid metal housing for harsh industrial applications,
• Super range of the throughbeam photoelectric switch of 300 m,
• Accessories for specialist applications,
• Universal supply voltage,
• On request: specialist devices for detecting very hot surfaces (>800 °C).

Main industries:

• Steel industry,
• Plant construction,
• Crane systems,
• Transport technology.

WTR, WLR and ZLM1 control the material flow on backup conveyor sections and, above all, support the exact infeed and outfeed of the conveyed products at distribution stations. No programming and less cabling.
WTR and WLR: "3 in 1" - photoelectric proximity switch and special photoelectric switch always form a compact unit with valve and logic. The special slimline housing in the top section of the WTR and WLR fits between all common roller spacings. Simultaneously, this mounting method offers protection against damage and simplifies installation.
The ZLM1 contains the logic function of the accumulating roller conveyor. Suitable optoelectronic or inductive SICK sensors can be connected to the ZLM1. Furthermore, the ZLM1 can be combined with WTR or WLR.
WTR and WLR ensure low-noise buffering of conveyed products free from dynamic pressure, no wear and tear and no mechanical problems in addition to detecting the conveyed products irrespective of weight.
Overview of WTR, WLR and ZLM1:

• Controlling the flow of goods on conveyor systems without additional programming.
• Increasing the availability of the conveyor systems.
• Reduced cabling and reduced mounting effort ("3 in 1") improve economy.
• Mounting between the rollers offers optimum protection against damage.
• Flexible: ZLM1 can be used in conjunction with any SICK sensors.

Main industries:

• Materials handling