Start with the required protective function and safety performance, then compare detection capability, protective height, response time, outputs and environmental limits. The safety light curtain family guide provides the selection starting point; synchronisation method and price are secondary checks, not safety-rating substitutes.
1. Common Types of Industrial Safety Light Curtain Sensors
In real industrial environments, different safety light curtain sensors are designed for different working conditions. Choosing the right type should always start from the actual site environment and the protection requirement.
1. Optical Synchronous Safety Light Curtains
Optical synchronisation avoids a separate sync conductor, but allowable ambient light, electrical interference and vibration are specified by the exact device. It is not inherently limited to low-risk tasks.
Consider MK and JER where the exact order code provides the required safety performance, detection and controller interface. Compare complete installed cost only after those requirements are met; optical synchronization and low price are not evidence of protective suitability.
2. Wired Synchronous Safety Light Curtains
Wired synchronisation uses a documented electrical sync path. Compare the exact model's optical/EMC and mechanical limits; a sync cable alone does not establish stronger welding immunity or a higher safety rating.
Compare the DQC and DQA exact configurations for the actual working range, ambient-light exposure, electrical interference and mounting conditions. A wired synchronization path does not itself establish stronger immunity or a higher safety level; request the relevant limits and test the installed environment.
2. Typical Application Scenarios in Different Industries
The table is a shortlist, not an approval to install a named series on a press. Verify the exact model evidence and machine-specific requirements, including whether the machine can stop during the hazardous stroke. A floor-standing curtain detects crossing, not continued occupancy after entry.
Different industrial machines and site environments have different requirements for safety light curtains. In practice, application matching is the first step in model selection.
| Application Equipment | Recommended Model | Selection Logic |
|---|---|---|
| Hydraulic press / Punch press | MK, JER optical synchronous series, or DQC series | A press application requires the exact model's safety evidence, adequate stopping capability and machine-specific validation. No MK, JER or DQC family name alone approves the installation. |
| Custom automation equipment | JER optical synchronous series is widely used | In many non-standard automation projects, the installation size and bracket size should be confirmed first. JER is a common choice in this type of application. |
| Robot hazardous area protection | DQSA area protection type with floor stand | For dangerous robotic operating zones, the yellow floor-standing type is often recommended. It can provide single-side, double-side, triple-side, or even four-side safety protection. |
3. Key Parameters for Model Selection
During the selection process, the following key parameters should be carefully evaluated. Many wrong selections are caused not by the product itself, but by ignoring the actual environment and control requirements.
- 1. Detection Range / Working Range
Make sure the effective range fully covers the real protection area. Otherwise, the result may be unstable performance or reduced effectiveness. - 2. Accuracy
Use declared detection capability, not a generic accuracy or higher-end label. Beam pitch alone does not establish the smallest reliably detected object. - 3. Output Signal
For the protective function, use the exact certified output architecture and compatible qualified safety logic. Ordinary 4–20 mA, 0–10 V, NO/NC or process-detection outputs are not interchangeable with a documented safety output. Confirm both-channel evaluation, test-pulse compatibility and any required feedback/reset functions. - 4. Working Environment
Temperature, humidity, waterproof rating, explosion-proof requirements, as well as site interference, vibration, arc light, and strong incandescent light should all be considered.
4. DAIDISIKE Series Comparison: DQC / DQA vs MK / JER
In actual projects, DAIDISIKE offers product solutions for different budgets and different site requirements.
DQC / DQA Series (Higher-End Type)
- Check declared detection capability and compatible safety outputs
- Compare documented response and operating limits for each order code
- Verify ambient-light and EMC performance in the actual installation
- Suitable for automation equipment and industrial environments with higher requirements
5. Safety Light Curtain Selection Process
A practical and reliable selection process usually follows these steps:
Define the Application
Clarify what kind of machine or area needs protection and what safety goal must be achieved.
Confirm the Technical Requirement
Determine the main technical requirement, such as protection distance, detection need, or control matching.
Choose the Series
Select between DQC / DQA or MK / JER according to site condition, anti-interference need, and budget.
Check the Environment
Consider temperature, waterproof need, explosion-proof requirement, interference, and vibration.
Confirm with Supplier
Finalize technical details with the supplier before ordering to avoid mismatch and installation problems.
6. Video Explanation
To help readers understand the logic behind safety light curtain selection more directly, we have included a video introduction below. Through the video, you can quickly understand practical application methods and model selection ideas.
Video link: Watch on YouTube
7. Why Choose DAIDISIKE?
- Factory direct supply with more competitive pricing
- Support for OEM and customized development
- Stable product performance for long-term industrial use
- Professional technical support for model selection
If you are not sure which model is suitable for your project, DAIDISIKE can provide one-to-one selection support according to your machine, environment, and installation requirement.
Expert Note
Published by the DAIDISIKE Engineering Team
Use the author's background as context, not as a claim that a new human review or project-specific safety validation has occurred. Final selection requires the exact device documents and the integrator's acceptance record.