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Safety Light Curtains

What Are Safety Light Curtains?

Safety light curtains are an important safety device that provides effective protection for personnel and equipment and helps reduce accidents in the workplace. Safety light curtains consist of a transmitter and a receiver. The transmitter emits multiple light beams, and the receiver receives and detects whether the light beams are complete. When a person or object enters the range of the light curtain, the light beam will be blocked, triggering the safety system to stop operating or take other safety measures.

Known as safety light screens or safety light barrier sensors, these curtains are ideal for automated production lines, industrial robots, and mechanical processing equipment where maintaining a safe distance is critical. DADISICK's high-quality safety light curtains are customizable to meet diverse operational needs, ensuring maximum safety, reliability, and accident prevention.

DADISICK Safety Light Curtains – Product Series

We offer a full range of industrial light curtain solutions to meet different safety and automation needs. Please choose the safety light curtain that meets your needs.
DADISICK Safety Light Curtain KT Series
Applicable to automated equipment, anti-interference
DADISICK Safety Light Curtain QBT Series
50m wide-range protection of hazardous areas
DADISICK Safety Light Curtain QZ Series
Eliminate dead zones, 0.01-second response time
DADISICK Safety Light Curtain QM Series
Can cascade 2 or 3 light curtains into L- or U-shaped configurations
DADISICK Safety Light Curtain QSA Series
Meet IP68 waterproof and dustproof standards
DADISICK Safety Light Curtain KT Series
Economical solution for minimal space
DADISICK Safety Light Curtain QBT Series
Ultra-thin front design for maximum reliability
DADISICK Safety Light Curtain QM Series
High-precision resolution with anti-mask function
DADISICK Safety Light Curtain QSA Series
Multi-zone protection safety light barrier

Why Use Light Curtain Safety Devices?

✅ Non-contact protection: No need for mechanical guards, improving workflow efficiency.
✅ Fast response time: Stops hazardous motion in milliseconds.
✅ Versatile applications: Works in presses, robotic arms, conveyors, and automated assembly lines.
✅ Compliance: Certified to Type 2 & Type 4, SIL3, and PL e safety levels.

Safety Light Curtain Applications and Solutions

Safety light curtain Solutions
Safety Light Curtain Solutions
Area Safety Solutions
Area Safety Solutions
Multi-Sided Access Protection Light Curtain Solutions
Multi-Sided Access Protection Light Curtain Solutions
Safety Light Curtains operate on a simple yet effective principle. They emit an array of parallel beams of light across the guarded area. A transmitter unit sends out the beams, while a receiver unit detects them. When an object or person interrupts these beams, the receiver unit signals the machinery control system to halt its operation immediately. Browse our product range to find the perfect safety solution for your industrial environment.
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Safety Light Curtains

ModelDescription
Cascade Safety Light Curtain | DADISICK | QT4 223-7.5-1665-2BBCascade Safety Light Curtain | DADISICK | QT4 223-7.5-1665-2BBQT4 223-7.5-1665-2BBBeam spacing: 7.5mm
Number of optical axes: 223
Protection height: 1665mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 180-15-2685-2BBCascade Safety Light Curtain | DADISICK | QT4 180-15-2685-2BBQT4 180-15-2685-2BBBeam spacing: 15mm
Number of optical axes: 180
Protection height: 2685mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 215-7.5-1605-2BBCascade Safety Light Curtain | DADISICK | QT4 215-7.5-1605-2BBQT4 215-7.5-1605-2BBBeam spacing: 7.5mm
Number of optical axes: 215
Protection height: 1605mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 207-7.5-1545-2BBCascade Safety Light Curtain | DADISICK | QT4 207-7.5-1545-2BBQT4 207-7.5-1545-2BBBeam spacing: 7.5mm
Number of optical axes: 207
Protection height: 1545mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 199-7.5-1485-2BBCascade Safety Light Curtain | DADISICK | QT4 199-7.5-1485-2BBQT4 199-7.5-1485-2BBBeam spacing: 7.5mm
Number of optical axes: 199
Protection height: 1485mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 191-7.5-1425-2BBCascade Safety Light Curtain | DADISICK | QT4 191-7.5-1425-2BBQT4 191-7.5-1425-2BBBeam spacing: 7.5mm
Number of optical axes: 191
Protection height: 1425mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 176-15-2625-2BBCascade Safety Light Curtain | DADISICK | QT4 176-15-2625-2BBQT4 176-15-2625-2BBBeam spacing: 15mm
Number of optical axes: 176
Protection height: 2625mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 172-15-2565-2BBCascade Safety Light Curtain | DADISICK | QT4 172-15-2565-2BBQT4 172-15-2565-2BBBeam spacing: 15mm
Number of optical axes: 172
Protection height: 2565mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 168-15-2505-2BBCascade Safety Light Curtain | DADISICK | QT4 168-15-2505-2BBQT4 168-15-2505-2BBBeam spacing: 15mm
Number of optical axes: 168
Protection height: 2505mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 164-15-2445-2BBCascade Safety Light Curtain | DADISICK | QT4 164-15-2445-2BBQT4 164-15-2445-2BBBeam spacing: 15mm
Number of optical axes: 164
Protection height: 2445mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 160-15-2385-2BBCascade Safety Light Curtain | DADISICK | QT4 160-15-2385-2BBQT4 160-15-2385-2BBBeam spacing: 15mm
Number of optical axes: 160
Protection height: 2385mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 156-15-2325-2BBCascade Safety Light Curtain | DADISICK | QT4 156-15-2325-2BBQT4 156-15-2325-2BBBeam spacing: 15mm
Number of optical axes: 156
Protection height: 2325mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 152-15-2265-2BBCascade Safety Light Curtain | DADISICK | QT4 152-15-2265-2BBQT4 152-15-2265-2BBBeam spacing: 15mm
Number of optical axes: 152
Protection height: 2265mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 148-15-2205-2BBCascade Safety Light Curtain | DADISICK | QT4 148-15-2205-2BBQT4 148-15-2205-2BBBeam spacing: 15mm
Number of optical axes: 148
Protection height: 2205mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 144-15-2145-2BBCascade Safety Light Curtain | DADISICK | QT4 144-15-2145-2BBQT4 144-15-2145-2BBBeam spacing: 15mm
Number of optical axes: 144
Protection height: 2145mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 140-15-2085-2BBCascade Safety Light Curtain | DADISICK | QT4 140-15-2085-2BBQT4 140-15-2085-2BBBeam spacing: 15mm
Number of optical axes: 140
Protection height: 2085mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 136-15-2025-2BBCascade Safety Light Curtain | DADISICK | QT4 136-15-2025-2BBQT4 136-15-2025-2BBBeam spacing: 15mm
Number of optical axes: 136
Protection height: 2025mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 132-15-1965-2BBCascade Safety Light Curtain | DADISICK | QT4 132-15-1965-2BBQT4 132-15-1965-2BBBeam spacing: 15mm
Number of optical axes: 132
Protection height: 1965mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain | DADISICK | QT4 128-15-1905-2BBCascade Safety Light Curtain | DADISICK | QT4 128-15-1905-2BBQT4 128-15-1905-2BBBeam spacing: 15mm
Number of optical axes: 128
Protection height: 1905mm
Safety Curtain outputs (OSSD):2 PNP
Cascade Safety Light Curtain Workplace Safety Sensors​​​ | DADISICK | QT4 183-7.5-1365-2BBCascade Safety Light Curtain Workplace Safety Sensors​​​ | DADISICK | QT4 183-7.5-1365-2BBQT4 183-7.5-1365-2BBBeam spacing: 7.5mm
Number of optical axes: 183
Protection height: 1365mm
Safety Curtain outputs (OSSD):2 PNP

Advantages of Safety Light Curtains

A safety light curtain is a sensing device designed to protect personnel from injury. These devices are most commonly used in factory automation for machine safeguarding. Unlike typical photoelectric sensors, safety light curtains monitor themselves through redundant signals and will stop the hazard (ex., machine) if an internal fault is detected.

Advantage 1: Multi-angle safety light curtains can be customized according to requirements

Special-shaped light curtains with different angles such as L-shape/U-shape can be customized. We have professional optical technology engineers and production factories, which can provide targeted solutions according to your project needs and produce products that meet the requirements.

Advantage 2: Reliable safety performance

The safety light curtain has perfect self-inspection function: when the safety sensor fails, it is guaranteed not to send wrong signals to the controlled electrical appliances; strong anti-interference ability: the system has good performance on electromagnetic signals, strobe lights, welding arcs and surrounding light sources Excellent anti-interference ability; short response time (≤15ms), high safety and reliability; conforms to the safety level of the International Electrotechnical Society IEC61496-1/2 standard, and CE certification of TUV.

Advantage 3: Easy to install and easy to use

Thanks to the slim design and practical mounting bracket, the installation, commissioning and calibration of the safety light curtain are very easy, the wiring is simple, and the appearance is beautiful. Light curtains are also more flexible than safety fences or hardware guards and require no effort to open/close. This makes safety light curtains ideal for securing machines that require frequent access.

Typical Applications of Safety Light Barriers

DADISICK light guards for machinery are suitable for various industries:
Press Machines & Punching Equipment – Precision hand/finger protection
Press Machines & Punching Equipment – Precision hand/finger protection.

Light curtain access guarding
Robotic Cells & Automated Assembly Lines – Perimeter and access guarding.

Packaging & Conveyor Systems – Safe yet efficient material flow
Packaging & Conveyor Systems – Safe yet efficient material flow.

Automatic safety curtains for AGVs and palletizers
Warehouse & Logistics Automation – Automatic safety curtains for AGVs and palletizers.

Frequently Asked Questions About Safety Light Curtains

Safety is a top priority in any industrial setting. Safety Light Curtains have emerged as a vital component in maintaining a secure work environment. These innovative devices are designed to detect the presence of objects or personnel within their coverage area and respond by ensuring the immediate cessation of machinery operations.

Are light curtains easy to install?

The DADISICK series of light curtains offers a variety of options. The high-power DADISICK series includes a variety of pre-assembled mounting brackets and built-in alignment indicators. The compact design of the DADISICK series allows installation in tight spaces.

Three wiring systems are available. Our optical sync and single-wire systems reduce wiring, while wired sync provides additional functionality when needed.

Will the machine stop if the light intensity decreases?

Traditional light curtains require regular maintenance to prevent downtime and other problems caused by reduced received light intensity. This dip can be caused by misalignment (due to shock or vibration) or by oil or dirt. Either condition can reduce the amount of light received enough to trigger the light curtain to stop the machine.

The robust design of the DADISICK series of light curtains prevents misalignment while ensuring stable detection even when oil or dust is stuck on the lens. Not only does this help prevent unplanned downtime, but it also helps avoid frequent maintenance.

Ask DADISICK

Hello! You've come to the right place to get answers about our products and solutions.In addition to DADISICK's own range of over 2000 products, we also offer a wide range of branded replacement products to meet your specific requirements.Our sales engineers are ready to provide comprehensive support at all levels of the business, from the design and research phase to model selection, on-site guidance and production line operation after product adoption. Use the form below to ask us about your needs and we will contact you as soon as possible .
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