The SG4-H Hygienic Safety Light Curtain is a Type 4 safety light curtain designed for pharmaceutical, aseptic processing and hygienic machinery applications where machine guarding must withstand frequent washdown and strict contamination-control requirements. With IP69K protection, AISI 316L stainless steel housing, optical glass window, 14 mm finger resolution and a 6 metre operating range, SG4-H provides compact, hygienic machine safety without the need for additional protection tubes.
The SG4-H is designed for machinery where operator safety, hygienic design and high mechanical protection are required in the same safety device. It provides finger protection at hazardous machine-access points through a stainless steel, gap-free and washdown-ready housing suitable for pharmaceutical and hygienic production environments.
The SG4-H safety light curtain is especially relevant for equipment requiring regular cleaning, sterilisation or exposure to aggressive washdown processes. Its IP69K housing, optical glass window and AISI 316L stainless steel construction allow direct installation within hygienic machinery zones without additional external protection tubes.
Pharmaceutical and aseptic production machinery often requires safety devices that do not create contamination traps. The SG4-H addresses this requirement through a hygienic profile, rounded surfaces, no sharp edges or gaps, and device information laser-marked onto the housing instead of applied labels.
This makes the SG4-H suitable for machinery where standard plastic or aluminium safety light curtains may not meet hygiene, cleaning or material-resistance requirements.
Key hygienic design features include:
The SG4-H provides Type 4 safety light curtain protection for machine-access points where finger protection is required. With 14 mm resolution, the system detects intrusion into the protected area and sends a safety output signal to stop or inhibit hazardous machine movement.
This makes the SG4-H suitable for protecting access points on pharmaceutical machinery, filling systems, packaging machines, blister-pack equipment and restricted-access barrier systems.
Typical safety functions include:
| Specification | SG4-H Details |
|---|---|
| Product type | Hygienic safety light curtain |
| Brand | Datasensing / Datalogic |
| Series | SG4-H |
| Safety category | Type 4 safety light curtain |
| Safety standards | Type 4 according to EN 61496-1; highest safety level according to EN ISO 13849-1 and EN 62061 |
| Performance level | PL e, model dependent |
| SIL / SILCL | SIL 3 / SILCL 3, model dependent |
| Resolution | 14 mm finger protection |
| Nominal sensing distance | 0.2–6 m |
| Protection heights | 150 mm, 300 mm and 450 mm |
| Number of rays | 16 rays for 150 mm, 32 rays for 300 mm, 48 rays for 450 mm |
| Function principle | Emitter and receiver pair |
| Restart function | Automatic restart models available |
| Outputs | Two solid-state safety outputs, electronically monitored |
| Housing material | AISI 316L stainless steel |
| Surface roughness | Under 0.8 micron |
| Window material | Optical glass |
| Mechanical protection | IP69K full protection |
| Profile size | 50 × 30 mm compact profile |
| Hygienic design | Rounded surfaces, no gaps, no sharp edges |
| Marking | Laser-marked information, no labels |
| Alignment aid | 4 LEDs and 7-segment display |
| Typical industries | Pharmaceutical, aseptic processing, hygienic packaging and filling machinery |
| Typical applications | Filling machines, blistering machines, RABS, primary packaging and hygienic access guarding |
The SG4-H is built for environments where cleaning, washdown and hygienic production conditions are part of daily operation. Its IP69K protection rating makes the light curtain suitable for machinery exposed to high-pressure, high-temperature washdown processes, subject to the installation and cleaning procedure.
This is important in pharmaceutical and hygienic production areas where safety devices must remain reliable without becoming weak points in the sanitation process.
The SG4-H is suitable when:
The SG4-H housing is made from AISI 316L stainless steel with a surface roughness below 0.8 µm. This material makes the device suitable for pharmaceutical and hygienic machinery where corrosion resistance, cleanability and durability are critical.
The stainless steel housing also protects the safety light curtain in demanding environments where regular cleaning, moisture, detergents or mechanical exposure may affect standard safety devices.
The SG4-H uses a compact 50 × 30 mm profile, helping machine builders install safety light curtains where available space is limited. Its hygienic housing removes the need for additional protective tubes, reducing installation complexity and supporting a cleaner machine design.
Four LEDs and a seven-segment display support alignment and setup, helping installers position the emitter and receiver correctly during commissioning.
The SG4-H is designed for pharmaceutical and hygienic production machinery where high safety levels and hygienic construction must work together.
Used to protect access points on pharmaceutical packaging equipment where operators interact with machine openings, loading zones or process areas.
Used in liquid filling, vial filling, syringe filling and aseptic filling environments where stainless steel safety devices are required.
Relevant to syringe filling and sterile liquid processing where hygienic design, cleanability and controlled access are important.
Used for tablet blistering and related solid-dose packaging machinery where operators need controlled and protected access.
Suitable for Restricted Access Barrier Systems (RABS) where controlled machine access, hygiene and operator safety are required.
The SG4-H is especially relevant for pharmaceutical plants, OEM machine builders and system integrators working with machinery in clean, washdown or aseptic environments.
Typical use cases include:
Standard safety light curtains can be effective in general industrial environments, but pharmaceutical machinery often requires stronger hygienic and washdown characteristics. The SG4-H is more suitable when the safety device must support cleanability, corrosion resistance and hygienic machine design.
The SG4-H is a strong fit when:
The SG4-H can be integrated into machine-safety systems where interruption of the protected field must stop or inhibit hazardous movement. The device uses an emitter-and-receiver pair and provides electronically monitored solid-state safety outputs for connection to the machine-safety circuit.
Integration may include:
MarvelTech can review the machinery layout, protection height, operating distance, mounting position, safety architecture and hygienic requirements before recommending the correct SG4-H model and accessories.
MarvelTech supports industrial automation, machine safety, sensors, barcode systems and machine vision projects. For SG4-H installations, MarvelTech can help select the correct protection height, review the safety application and support integration into the wider machine-safety architecture.
MarvelTech can help with:
The SG4-H is a strong fit when a machine requires Type 4 finger protection and hygienic stainless steel construction.
It is especially relevant when:
To recommend the correct SG4-H model and safety-integration approach, MarvelTech can review your machine, access point and hygienic requirements.
Before enquiring, prepare the following details where possible:
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