Point-of-Operation Guarding
Start with the risk assessment, required detection capability and measured machine stopping time before selecting a series.
Compare core series →Leading Safety Light Curtain Manufacturer in China
Looking for reliable machine guarding solutions? DAIDISIKE is a premier safety light curtain manufacturer dedicated to protecting your workforce and machinery. As a trusted provider of advanced China light curtain technologies, we supply high-quality industrial safety systems tailored for the global safety light curtain market. From robust heavy-duty options to precision sensors, we are your on-site safety partners.
Use this category to browse light curtain series, compare selection requirements and request model documentation. For supplier qualification, OEM options, MOQ, lead time and export planning, use the dedicated manufacturer and sourcing guide.
Industrial Safety Light Curtain Solutions
Advanced Safety Light Curtain Sensor & Type 4 Solutions
Our Type 4 safety light curtain (PL e / Cat.4 safety-chain applications) is represented by the DQT4 series. Other families cover different protection tasks and interfaces, so the required safety architecture must be confirmed model by model before integration.
Versatile & Compact Safety Light Curtain Designs
Whether you need a heavy-duty setup with 14 mm / 30 mm resolution or a compact safety light curtain for tight automated packaging lines and robot cells, our sealed models are available for oily, dusty, humid or outdoor environments. Confirm the enclosure rating for the exact model and cable configuration selected.
Competitive Safety Light Curtain Price from the Manufacturer
Because you are dealing directly with the safety light curtain manufacture team, you source through a factory-direct channel. This ensures you receive a competitive safety light curtain price along with model-specific wiring information and technical support. Review OEM, MOQ and export information when planning a sourcing project.
Industrial Safety Light Curtain Sensors
Industrial safety light curtain sensors are electro-sensitive protective devices used to detect a person reaching through an open machine access point. Select the required detection capability, protective height and mounting distance from the machine risk assessment and measured stopping performance, then confirm the safety architecture, response time, outputs and certificate scope for the exact ordered model. To choose the appropriate device type, compare Type 2 and Type 4 light curtains. Safety outputs must also be integrated into a validated machine control system; review safety relay modules for light curtains where relay-based integration is appropriate. Measuring light grids, vehicle detectors and perimeter alarm beams are presented separately because they are not substitutes for personnel- protection safety light curtains.
Why Partner with a Direct Safety Light Curtain Manufacturer?
In the realm of industrial automation, machine guarding is not a place for compromises. Sourcing directly from a reputable safety light curtain manufacturer like DAIDISIKE gives you consistent quality, full technical transparency, and factory-direct pricing. We specialize in designing and producing robust optical safety sensors that meet the rigorous demands of modern manufacturing facilities worldwide.
Engineered for High-Risk Machine Guarding
Our comprehensive portfolio covers everything from basic access control to high-risk point-of-operation guarding. Whether you are securing mechanical punch presses, hydraulic press brakes, robotic welding cells, or automated packaging lines, our product range offers different safety architectures, resolutions, outputs and housings. DQT4 is catalogued with an IEC 61496 Type 4 and dual-OSSD architecture; final system capability still depends on the valid certificate, response time, detection capability, circuit integration and validation for the exact model.
Global Certifications: CE, RoHS, and IEC 61496 Standards
We understand that B2B procurement requires verified trust. Every safety sensor that leaves our facility undergoes strict quality control testing. Applicable CE declarations, test reports, IEC 61496 classification and ingress-protection evidence depend on the selected series and configuration. Tell us the required market and document scope before ordering so the evidence can be checked against the exact model rather than assumed across the full range.
OEM / ODM Customization & Competitive Pricing
Unlike standard distributors, DAIDISIKE offers deep technical customization. From specific cable lengths and anti-vibration mounting brackets to custom protective heights and blind-zone-free designs (like our DQO series), our OEM and ODM services are tailored to fit your exact machinery footprint. Through factory-direct sourcing, we offer a competitive safety light curtain price without sacrificing the premium internal components that keep your production line running safely shift after shift.
Already know the broader equipment family you need? Browse the full DAIDISIKE product catalog for related machine-safety, sensing and automation products.
Choose a Light Curtain by Protection Task
Start with the function the machine needs. A personnel-safety device, a measurement grid and a perimeter alarm can all use infrared beams, but they are not interchangeable.
Punch Press & Press-Brake Protection
Compare fixed light curtains, press-specific photoelectric guards and moving-tool laser guards for the actual press process.
Review the press-guarding route →Measurement, Counting & Vehicle Separation
Use detection or measurement light curtains when the job is profiling, counting, dimension checks or vehicle separation rather than personnel protection.
Review non-safety light grids →Safety Output Integration
Route safety outputs through an appropriate safety relay or safety PLC and validate the complete machine safety function.
Review integration requirements →Safety Light Curtain Series for Machine Guarding
These series form the core machine-guarding collection. The safety level, outputs, resolution, response time, enclosure rating and documentation are model-specific; verify them before final selection.
DQA Safety Light Curtain Sensor
DQC Safety Light Curtain Hand Guard
DQB Safety Light Curtain Detector
DQO Blind-Spot-Free Safety Light Curtain
DQR Waterproof Outdoor Safety Light Curtain
DQE Dual-Output Safety Light Curtain
DQSA Area Safety Protection Light Curtain
JER Optical Synchronization Safety Light Curtain
DQT Safety Light Grating
DQZ Safety Photoelectric Sensor
DQT4 Type 4 Safety Light Curtain
MQ Essence Slim Light Curtain (Optical Sync)
MK Safety Photoelectric Switch
DQBT Light Curtain Safety Sensor
DQV Electro-Optical Safety Guard
DCE Photoelectric Safety Barrier
FB Explosion-Proof Safety Light Curtain
Safety Light Curtain Series Overview
Compare the intended role and physical design first, then confirm the ordered model's safety architecture, detection capability, protective height, range, response time, outputs and enclosure rating.
DQC Safety Light CurtainThe Industry Standard
This is our bread and butter. It's the model we ship the most because it's reliable, easy to align and gets the job done on standard presses or automation lines without any hassle.
Key Features
- Full range of resolutions (finger to body protection)
- Standard M12 connectors (PNP / NPN flexible)
- Comes with heavy-duty mounting hardware
- High immunity to factory floor electrical noise
Typical Applications
- Pneumatic and mechanical presses
- Packaging and stamping lines
- General-purpose machine guarding
DQE Safety Light CurtainFor Large Openings
Standard curtains can struggle with alignment over large gaps. We built the DQE with a reinforced housing specifically for tall or wide windows where rigidity is key.
Key Features
- High beam density for tall safety zones
- Dual-connector design for cleaner wiring
- Fast response times to minimize safety distance
- Stiff casing prevents flexing over long spans
Typical Applications
- Oversized press openings
- Robot workcells
- Long conveyor access points
DQA Safety Light CurtainHigh Performance
When productivity is the priority, you can't have false trips. The DQA series is our premium, high-speed line designed for environments that require maximum uptime.
Key Features
- Versatile beam spacing options
- Superior vibration and noise resistance
- Compatible with a wide range of mounting gear
- Stays reliable even near reflective surfaces
Typical Applications
- High-speed metal forming
- Automated assembly stations
- Robot safety perimeters
DQT Safety Light CurtainLarge Capacity
Need to cover a massive vertical area? The DQT series extends the beam count beyond standard limits, making it the go-to choice for tall gates and palletizing systems.
Key Features
- Extended beam counts for high-coverage areas
- Highly customizable height and spacing
- Pairs perfectly with external safety controllers
Typical Applications
- Tall machine access doors
- Palletizing and material handling
- Wide conveyor crossings
MK Mini Light CurtainSlim / Compact
If you're tight on space, the MK series is the answer. It's a slim, cost-effective option for small machines where a bulky sensor just won't fit.
Key Features
- Small-footprint housing
- Straightforward wiring for quick installs
- No complex configuration required
Typical Applications
- Small workbench protection
- Electronics assembly tools
- Compact automation cells
JER Safety Light CurtainEconomy Choice
The daily workhorse. This series offers great value for standard guarding tasks, providing reliable protection without the premium price tag.
Key Features
- Standard spacing for common industrial use
- Simple, no-fuss installation
- Works with all standard mounting brackets
Typical Applications
- General conveyors
- Packaging machinery
- Basic machine safety
DQO Blind-Spot-Free CurtainFull Coverage
Traditional light curtains often have 'dead zones' at the ends. The DQO protects the entire length of the unit, preventing hands from slipping through at the top or bottom.
Key Features
- True end-to-end detection (no dead zones)
- Flexible wiring configurations
- Very easy to align, even at short range
Typical Applications
- Low-clearance machine openings
- Precision tooling setups
- Close-proximity guarding
DQR Water-Resistant CurtainDQR IP65 / DQRF cover option up to IP68
DQR is documented as IP65 for wet, oily or outdoor installations; the DQRF protective-cover configuration is the option documented up to IP68. Confirm the ordered enclosure and cleaning method before use.
Key Features
- Fully sealed, waterproof housing
- Oil and coolant resistant
- Performs reliably in high humidity or outdoors
Typical Applications
- Outdoor gates and entryways
- CNC machining coolant-splash zones
- Wet-process areas within the ordered enclosure rating
DCE Safety Light CurtainFor Machine Builders
We designed the DCE with OEMs in mind. It's modular, easy to integrate into new machine builds and simple for end-users to maintain.
Key Features
- Huge selection of beam counts
- Clean wiring diagrams for easy integration
- Quick-swap design for faster servicing
Typical Applications
- OEM machine manufacturing
- Multi-station automation
- Custom equipment builds
DQZ Ultra-thin CurtainFront Thin (~17 mm)
When you're mounting to a very narrow frame, every millimeter counts. The DQZ has an incredibly slim front profile to fit right into the machine structure.
Key Features
- Ultra-slim 17.2 mm front profile
- Flexible cable routing for tight spots
- Available in multiple resolutions
Typical Applications
- Slim machine frames
- Panel-integrated safety
- Light-duty assembly stations
DQB Ultra-thin CurtainSide Thin (~15 mm)
This model is razor-thin from the side. It's designed to slide into narrow gaps between machine guards where traditional sensors won't fit.
Key Features
- Extremely narrow side profile (15 mm)
- Common 20 / 40 mm spacing options
- Low-profile brackets for flush mounting
Typical Applications
- Sliding doors and hatches
- Narrow gap guarding
- Compact machine retrofits
DQBT Ultra-thin (Optical Sync)Wireless Sync
Forget the sync cable. The DQBT uses optical synchronization, which makes retrofitting existing machines much easier since you have fewer wires to run.
Key Features
- No physical sync wire needed
- Slim-profile housing
- Drastically simplifies the wiring process
Typical Applications
- Retrofit and upgrade projects
- Small machines with limited wiring space
- Quick-install safety zones
MQ Essence Slim Curtain29×30 mm / Optical Sync
Our slimmest through-beam pair with a clever trick: synchronisation travels inside the light beam, so there is no wire at all between transmitter and receiver — even separate power supplies work. 87 standard models across 10/20/40 mm pitches, all M12 plug-and-play.
Key Features
- 29 × 30 mm profile fits tight press uprights
- Optical sync — zero conductors between TX and RX
- Factory-fitted 3 m cables with M12 connectors
- ≤ 10 ms response, 10,000 Lux ambient light immunity
Typical Applications
- Small press dies and punch tooling
- Press brake and stamping feed openings
- Retrofits where running a sync cable is impractical
DQT4 Type 4 Safety CurtainType 4 / Dual OSSD
The DQT4 is catalogued with an IEC 61496 Type 4 architecture, redundant OSSD outputs and EDM support. Final system capability depends on the valid certificate for the ordered model, circuit integration and validation.
Key Features
- Catalogued IEC 61496 Type 4 architecture
- Redundant dual-channel PNP OSSD outputs
- 7.5 / 15 / 30 mm resolution options
Typical Applications
- High-risk hydraulic machinery
- Robot cells requiring strict safety
- Hazardous automated zones
FB Explosion-Proof Safety CurtainBuild to Order
A project-specific welded enclosure built around a selected DAIDISIKE optical curtain for hazardous-area machinery. The applicable zone, gas or dust group and documentation must be confirmed for each project before ordering.
Key Features
- Project-specific explosion-protected enclosure
- Base optical series selected to the guarding task
- Documentation confirmed against the written project specification
Typical Applications
- Chemical processing machinery
- Combustible-dust production areas
- Hazardous-area machine retrofits
DQV Press Safety GuardAdvanced Setup
A flexible solution for press guarding that allows for more complex I/O logic and wiring, perfect for sophisticated forming lines.
Key Features
- Multiple controller compatibility
- Highly configurable I/O
- Supports complex safety sequences
Typical Applications
- Advanced press automation
- Large metal forming systems
- Custom safety logic builds
DQSA Area Safety CurtainWide-Area Guarding
When you need to guard a whole perimeter rather than just a window. It uses wider beam spacing to secure entire zones around machines.
Key Features
- Wide beam spacing for area coverage
- Pairs with standard safety controllers
- Cost-effective for large layouts
Typical Applications
- Large machine perimeters
- Warehouse AGV zones
- Robot cell entrance protection
Safety Light Curtain Series Comparison
This table is a first-step selector, not a substitute for the model datasheet or machine risk assessment. “Confirm by ordered model” means the value varies within the family and must be checked in the quotation and technical documentation.
| Series | Primary task | Detection capability | Safety output / interface | Selection note |
|---|---|---|---|---|
| DQT4 | Type 4 point-of-operation guarding | 7.5 / 15 / 30 mm | Dual PNP OSSD; EDM supported | Confirm response time for the ordered model |
| DQB / DQZ / DQBT / MQ | Compact machine openings | Multiple options by series | Varies by series and model | Choose by available mounting space and wiring method |
| DQO | End-to-end coverage at an opening | Confirm by ordered model | Confirm by ordered model | Use where end blind zones affect the mounting layout |
| DQR | Wet, oily or outdoor installations | Confirm by ordered model | Confirm by ordered model | Confirm enclosure rating and environment for the exact model |
| DQA / DQC / DQE / DQT | General machine and access guarding | Multiple options by series | Confirm by ordered model | Match protective height, range and response time to the machine |
| DCE / DQV / MK / JER | OEM machines and compact automation | Multiple options by series | Confirm by ordered model | Verify safety architecture and interface before selection |
| DQSA | Wider-area access detection | Confirm by ordered model | Confirm with the selected controller | Safety use depends on the selected model and complete safety chain |
| FB | Hazardous-area machine guarding | Depends on the selected optical core | Depends on the selected optical core | Project-specific enclosure and documentation |
What are the advantages of our products?
Construction and Integration Considerations
Model-Specific Architecture
Confirm the safety type, diagnostics and output architecture for the exact series. Do not infer Type 4, OSSD or EDM functionality from the housing style alone.
High-Precision Optics
Range, alignment tolerance, resolution and ambient-light immunity vary by optical design. Select them from the ordered model's verified data.
Signal Integrity
Match the output type, connector, cable shielding and controller interface to the machine circuit. Keep both safety channels independent where the selected architecture requires it.
Ruggedized Durability
Choose brackets and an enclosure rating for vibration, coolant, dust, washdown or outdoor exposure. Verify special environmental claims on the selected model.
Final selection depends on the complete machine safety function, not the sensor alone.
Safety light curtain is a kind of photoelectric sensor used for industrial safety protection, which forms a protective area by transmitting and receiving infrared light beams, and triggers a safety signal when the light beams are blocked, preventing people or objects from entering the dangerous area. In modern factories, people and machines work together; on some potentially dangerous machinery — stamping machines, shearing equipment, metal-cutting equipment, automated assembly lines — the safety light curtain solves the operator-protection problem.
The safety light curtain consists of two parts: the light emitter and the light receiver. The emitter sends modulated infrared light, the receiver captures it, and together they form a protective net. When an object enters the net and blocks one or more beams, the receiver changes its outputs. An appropriate safety relay or safety PLC then commands the machine to a safe state as defined by the validated safety circuit.
Safety light curtains are called the “invisible shield” of the danger zone. The emitter sends evenly-distributed infrared rays under precise rules and the receiver monitors the beam state. Diagnostic coverage, fault response and output architecture differ by series, so these functions must be verified for the exact model.
Resolution options and application scenarios
Depending on the application requirements, our safety light curtains offer a wide range of resolution options to meet the protection requirements of different scenarios:
| 2.5 mm / 5 mm | Fine detection | Suitable for precision measurements and small-object detection. The high resolution enables accurate detection of small objects and dimensions, particularly in electronic processing and precision assembly. These are measurement tasks, not personnel protection. See the DQL measurement light curtain and related DQM models. |
| 14 mm | Finger protection | Commonly considered for finger-detection tasks. Confirm the actual detection capability, response time and required safety distance for the selected model. |
| 20 mm / 30 mm | Hand / palm detection | Used for wider detection tasks where the risk assessment permits. Coarser resolution generally increases the intrusion allowance in the safety-distance calculation. |
| 40 mm and above | Hand / body access | Considered for access or perimeter tasks rather than fine finger detection. Confirm the approach direction, beam arrangement and applicable standard. |
| 80 mm / 200 mm+ | Large-object detection | Suitable for vehicle separation, logistics detection and other automation tasks. These uses are not automatically personnel-safety applications. DQLV vehicle-separation light curtain |
The working principle is based on infrared-beam detection technology. On one side of the light curtain, infrared emitting tubes are installed at equal intervals; on the other side, the same number of infrared receiving tubes are arranged in the same way, each emitter aligned with its receiver.
When no obstacle blocks the line between emitter and receiver, the modulated optical signal reaches the receiver normally. When a beam is blocked, the receiver detects the interruption and changes the relevant output state according to that model's documented logic.
When no object passes through the light curtain, all modulated signals reach their receivers normally. The safety controller evaluates the clear, interrupted and fault states; the output polarity and diagnostic behavior must be taken from the selected model's wiring documentation.
Outputs, Wiring and Safety Integration
A safety light curtain does not create a complete machine safety function by itself. Connect the selected outputs to an appropriate safety relay or safety PLC, then use the evaluated safety outputs to control the machine's final switching devices. Review the relay and control module range and confirm which model supports the curtain's actual output architecture.
Safe Integration Checklist
- Verify the interface: identify whether the ordered curtain provides OSSD, relay or another documented output type.
- Keep channels independent: where dual-channel safety outputs are provided, wire and monitor them according to the product documentation and circuit design.
- Validate the stop: include curtain response, logic response and measured machine stopping time in the safety-distance calculation.
- Commission the complete function: test interruption, faults and restart behavior on the actual machine before production use.
Do Not Substitute a Timing Module
B2J0601 and E4J0101 are general timing/control modules. They must not be used as the safety-rated decision element for personnel protection or as a substitute for an appropriate safety relay or safety PLC. A timing function may be used only on a separate, non-safety process-control side where the risk assessment allows it.
Request a Safety Light Curtain Quote or Documentation
To receive an accurate series recommendation, datasheet and CAD availability check, include the following project information:
- Machine type, hazard and direction of approach
- Required protected height and opening width
- Detection task or required resolution
- Sensing distance, supply voltage and controller interface
- Indoor, outdoor, coolant, washdown, vibration or hazardous-area conditions
- Required certification/document scope, quantity and destination country
Final safety distance and suitability remain the machine integrator's responsibility and must be validated using the confirmed model data.
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Advanced Sensor Solutions for Industrial Safety and Automation
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Measuring DQL Series 3D
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Area DQSA Protection
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How to Choose the Right Safety Light Curtain:
A Salesman's Practical Guide
As a sales professional, I see it all the time: a customer lands on this page because they know they need a safety light curtain, but then they get stuck. With so many models available, how do you pick the right one without overthinking it?
It actually comes down to a few simple questions. Here is how I personally guide my clients to the best fit:
1. Start with Your Equipment
First, look at the machine itself.
- Heavy vibration? If you are working with heavy machinery like punch presses, vibration is your biggest enemy. Compare the DQA or DQT series, then verify vibration resistance, brackets, response time and safety architecture for the ordered model.
- Light automation? If you just need standard safety protection for lighter assembly lines or automation gear, go with the MK or JER series where their documented housing and synchronization method fit the installation. Confirm the required output and safety level instead of selecting on size alone.
2. Domestic vs. Export: What's Popular?
- The best value choice: the DQC series is a general machine-guarding option. Confirm the required detection capability, range, outputs and documentation for your configuration.
- For export markets: if you are shipping machines overseas, I usually suggest the DQE series. Confirm the output configuration and market documentation for the exact export model before designing the control panel.
3. Check the Environment
Where will the light curtain live? Indoors or outdoors?
- Sun & rain: if the equipment is outdoors, facing rain or direct sunlight, you need specific protection. The DQSA series is intended for wider-area layouts; verify the model's enclosure rating, controller and safety role for the outdoor installation.
- Special applications: we also have specialized options like vehicle separators for highway tolls. Or, if you simply need something robust against the elements, check out our DQR Waterproof series. Confirm its ordered enclosure rating and ambient limits.
4. What's the Goal: Safety or Measurement?
- Personnel safety: choose only a series whose documented safety architecture and performance match the machine risk assessment.
- Measuring & counting: if you need to measure length, width or height of an object, investigate the model-specific measurement interfaces of DQL. For a fast count or detection signal, DQM provides 0.5 ms NPN or PNP transistor switching, without RS485 or RS232. Select the interface and performance from the exact model data; do not use them by themselves for personnel protection.
Still Not Sure?
Selection can be tricky if you haven't done it before. If you're still scratching your head, just reach out — chat with our online support or send an inquiry email. We'll get back to you ASAP.
There are more specs to cover than I can list here.
Click here to read our detailed Light Curtain Selection Guide.
Safety Light Curtain Knowledge Base
Guides on selecting, wiring, checking safety evidence and troubleshooting safety light curtains. Use the relevant task below; a replacement or application guide is not approval of a particular machine design.
Selection & Specs
Standards & Safety Distance
Wiring & Integration
Brand Replacement
Troubleshooting & Maintenance
Safety Light Curtain Frequently Asked Questions
What is the difference between a safety light curtain and a measuring light curtain?
A safety light curtain is selected and integrated to protect people at a machine hazard. A measuring light curtain reports beam interruption for counting, profiling, dimensions or vehicle detection. DQL, DQM and DQLV belong to the measurement and detection group and must not be used by themselves for personnel protection.
Do all DAIDISIKE safety light curtains have Type 4, PL e and OSSD ratings?
No. Architecture, outputs, ingress protection, response time and certification scope vary by series and ordered model. DQT4 is catalogued with an IEC 61496 Type 4 architecture, while DQS has a factory-documented Type 4 architecture that requires the certificate for the exact configuration. Final system capability depends on valid evidence, integration and validation. DQA, DQC and DQE are not presented as Type 4 here, and no currently listed series should be treated as a verified Type 2 offering without model-specific evidence.
How do I choose the correct resolution and mounting distance?
Choose the required detection capability from the risk assessment, then calculate the safety distance using the complete stopping time of the machine and the confirmed response time of the selected curtain. Finer resolution can reduce the intrusion allowance, but the final installation must be validated on the machine.
Can a safety light curtain switch a motor contactor directly?
Do not treat a general sensor output or a timing relay as the complete safety chain. Connect the selected safety outputs to an appropriate safety relay or safety PLC, then control and monitor the final switching devices according to the validated circuit design.
Which information should I send for a quotation?
Send the machine type, hazard and access direction, required protected width and height, desired detection capability, sensing distance, supply voltage, output or controller interface, environment, mounting constraints, quantity and destination country. Also state any required certificate or technical-document scope.
Where can I get OEM, MOQ, lead-time and export information?
Use the dedicated manufacturer and sourcing page for OEM options, MOQ, current lead time and export documentation. These commercial details are confirmed with the final model and order configuration.