steve
Got hold of Sime for a Carrier card for…
Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
3 weeks ago
L21S-21MA2A
Sick L21S-21MA2A available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Sick L21S-21MA2A is a compact single-beam photoelectric sensor from the L21 range, designed as the transmitter unit in a matched sensing pair. Built in a durable nickel-plated brass M18 cylindrical housing with a glass lens, it offers dependable optical performance in industrial environments while maintaining a slim format that is easy to integrate into machinery and production equipment.
This model uses visible red LED light with a 16 m operating range, axial optics and a fast 0.2 ms response time, making it well suited to applications where accurate beam alignment and reliable object detection are important. The sensor features an angled 4-pin M12 connection, IP67 protection and a wide operating temperature range, supporting use in demanding factory conditions.
With its robust construction, low power consumption and proven SICK design, the L21S-21MA2A is a practical choice for machine builders and maintenance teams looking for a high-quality photoelectric switch for automated systems.
This model uses visible red LED light with a 16 m operating range, axial optics and a fast 0.2 ms response time, making it well suited to applications where accurate beam alignment and reliable object detection are important. The sensor features an angled 4-pin M12 connection, IP67 protection and a wide operating temperature range, supporting use in demanding factory conditions.
With its robust construction, low power consumption and proven SICK design, the L21S-21MA2A is a practical choice for machine builders and maintenance teams looking for a high-quality photoelectric switch for automated systems.
| Specification | Description |
|---|---|
| Part number | L21S-21MA2A |
| Alternative part number | L21S21MA2A |
| Manufacturer | Sick |
| Product type | Single-beam photoelectric sensor transmitter |
| Series | L21 |
| System part | Sender / transmitter |
| Sensing range | 16 m |
| Number of beams | 1 |
| Optical axis | Axial |
| Light source | LED |
| Light type | Visible red light |
| Wavelength | 660 nm |
| Response time | 0.2 ms |
| External test response | 0.2 ms + test device response time |
| Safety type | Type 2 to IEC 61496-1 |
| Safety integrity level | SIL 1 to IEC 61508 |
| Category | Category 2 to EN ISO 13849 |
| Performance level | PL c to EN ISO 13849 |
| PFHD | 1.0 x 10^-6 per hour |
| Mission time | 20 years |
| Test rate | 100/s external test rate |
| Maximum demand rate | 60 min^-1 |
| Supply voltage | 24 V DC |
| Supply voltage range | 19.2 V DC to 28.8 V DC |
| Power consumption | ≤ 20 mA |
| Electrical protection class | Class III to IEC 61140 |
| Connection type | M12 male connector, 4-pin, angled |
| Design | Cylindrical |
| Thread size | M18 x 1 |
| Dimensions | M18 x 85.3 mm |
| Housing material | Nickel-plated brass |
| Lens material | Glass |
| Weight | 67 g |
| Enclosure rating | IP67 to EN 60529 |
| Ambient operating temperature | -40 °C to +55 °C |
| Storage temperature | -40 °C to +75 °C |
| Humidity range | 15% to 95%, non-condensing |
| Vibration resistance | 5 g, 10 Hz to 55 Hz to IEC 60068-2-6 |
| Shock resistance | 10 g, 16 ms to IEC 60068-2-27 |
| Aperture / receiving angle | ± 5° / ± 5° |
| Commodity code | 853650 |
What type of device is this?
This is a photoelectric sender designed for single-beam detection in industrial installations. It forms one half of a matched sender/receiver set and emits a visible red light beam for beam-based monitoring.
Is this unit a sender or a receiver?
This model is the sender. It is intended to be paired with a compatible receiver in the same product family to create the complete sensing arrangement.
What is the operating range?
The scanning range is up to 16 m, making it suitable for applications where a longer beam path is needed across access points, conveyors or machine openings.
What light source does it use?
It uses an LED light source with visible red light at 660 nm. The visible beam can help during installation and alignment.
How fast does it respond?
The stated response time is 0.2 ms. Where an external test device is used, the overall response will also depend on the response time of that device.
What supply voltage is required?
The unit is designed for 24 V DC operation, with a permissible supply range of 19.2 V DC to 28.8 V DC.
What electrical connection does it use?
It has an angled 4-pin M12 male connector. This connection style is commonly chosen for neat panel and machine wiring where space around the sensor body is limited.
What are the housing size and construction details?
The device has a cylindrical M18 housing and measures 85.3 mm in length. The body is nickel-plated brass, the lens is glass, and the unit weighs approximately 67 g.
What environmental protection does it offer?
It is rated IP67, which helps it cope with demanding industrial environments. The operating temperature range is -40 °C to +55 °C, and storage temperature range is -40 °C to +75 °C.
What is the beam angle?
The aperture angle and receiving angle are both specified as ±5°. This gives a clear indication of the alignment window when setting up the beam path.
Which companion unit is typically paired with this sender?
A commonly matched receiver in the same series is L21E-21MA2A. Pairing the correct receiver with the sender is important for proper operation.
Are connection accessories commonly used with this unit?
Yes. Typical accessory choices include M12 female connection components and sensor/actuator cables with flying leads. Commonly referenced options for this family include straight or angled 4-pin M12 connection accessories, depending on the installation layout.
- Forming part of a single-beam photoelectric detection set for monitoring access points on industrial machines when paired with a compatible receiver
- Detecting the interruption of a light beam to identify the presence of operators, pallets, cartons or other moving items in automated equipment
- Monitoring entry and exit zones around conveyors, transfer stations and automated handling systems
- Providing object presence detection in packaging, assembly and material flow applications
- Supporting machine interlock arrangements where beam interruption is used as a control signal within a wider system
- Helping supervise hazardous movement areas in manufacturing cells, robotic stations and indexing machinery as part of a correctly designed sensor arrangement
- Creating long-range beam paths across openings, passages and machine perimeters with its 16 m operating distance
- Use in industrial environments requiring a compact M18 cylindrical sensor body and IP67 protection
- Integration into equipment where visible red light assists with straightforward alignment during installation
- Suitable for OEM machinery, production lines and retrofit projects that require a robust transmitter for through-beam photoelectric sensing
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
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Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
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Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
2 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
3 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
4 months ago
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