Foshan, China, September 1, 2026 — Foshan DAIDISIKE Optoelectronics Technology Co., Ltd. has introduced a structured online selection resource covering 17 safety light curtain series for machine builders, automation integrators and industrial facilities.

The new resource is designed to simplify a product category in which similar-looking devices may have very different detection capabilities, housing dimensions, operating ranges, output architectures and environmental ratings.

Instead of asking users to compare every available datasheet, the selection process begins with five practical questions: What is the installation environment? What size object must be detected? What protective height is required? How wide or complex is the guarded area? What housing space and control architecture are available?

Environment is considered first because it can eliminate unsuitable models before optical specifications are compared. Standard factory applications may use a general-purpose safety light curtain, while wet, humid or coolant-exposed areas require a more suitable enclosure.

DAIDISIKE’s DQR series is intended for splash, humidity and washdown-related applications, with an IP68 special-order DQRF enclosure available for more demanding environments. Custom explosion-protected configurations are also available for projects in which the installation zone and gas or dust group require an engineered enclosure.

The second selection factor is resolution. A machine opening where fingers can approach the hazard requires a different detection capability from an entrance used to detect a hand, arm or full body.

The DQT4 family includes a 7.5-millimeter beam-pitch grade designed to achieve 14-millimeter object detection. Other product families provide beam pitches from 10 to 200 millimeters for finger, hand, arm, body and perimeter applications.

Resolution should not be selected in isolation. It affects the minimum object that can be detected and contributes to the required mounting distance from the hazard. The final installation distance must account for the complete response and stopping time of the safety system and machine.

Protective height is the third decision point. It refers to the effective sensing field rather than simply the overall length of the aluminum housing. The selected curtain must cover the complete access opening without leaving routes that allow a person to reach over, under or around the sensing field.

DAIDISIKE product families support applications ranging from small feed openings and bench-top machines to tall access points and large automated systems. The DQT series supports large beam counts and protected heights approaching 2,900 millimeters, while the DQT4 family covers a broader range of fine-resolution and extended-height configurations.

Span and layout form the fourth selection stage. Standard sensing distances of approximately 0.3 to 3 meters or 0.3 to 6 meters cover many presses, packaging machines and automated workstations.

Large presses, hydraulic machines and transfer lines may require longer operating distances. The DQA and DQT product families offer distance classes reaching up to 40 meters, depending on the selected model and configuration.

Perimeter protection introduces a different geometric challenge. The DQSA system uses one transmitter and receiver together with passive mirrors to fold the sensing field around two, three or four sides of a robot cell or hazardous area. This can reduce the number of powered devices and wiring locations needed around a larger installation.

Housing space is especially important during machine retrofits. Existing frames, guide rails and sliding doors may not provide enough room for a conventional light curtain profile.

For narrow mounting spaces, the DQB series uses a 15 by 30-millimeter side-emitting housing, while the DQZ series provides a 17.2 by 30-millimeter front-emitting format. The MK family uses a compact 25 by 23-millimeter housing for smaller machines and workstations.

Where an end blind zone could leave an accessible gap, the DQO series positions its first and last beams close to the ends of the housing. This allows the effective sensing field to begin nearer to the machine structure.

Electrical integration is the final part of the selection process. Available configurations include NPN and PNP transistor outputs, relay outputs, controller-based systems and dual-channel OSSD arrangements.

The DQO and DQT4 families provide dual safety outputs for two-channel evaluation. In a typical safety architecture, the two channels connect independently to a compatible safety relay or safety PLC. The evaluation device then controls force-guided contacts or final switching devices responsible for removing hazardous motion.

A standard PLC may be used for machine status, alarm display and production diagnostics, but it should not be assumed to provide a safety-rated stop function. The complete control architecture must be selected and validated according to the machine risk assessment.

The updated resource also separates personnel-protection safety light curtains from products intended for industrial measurement. Measuring light grids may be used for counting, profiling, positioning or dimensional inspection, but they should not be substituted for a safety-rated protective device.

Machine builders and automation engineers can review the complete selection path and compare the 17 DAIDISIKE product series at:

https://www.daidisensor.com/products/safety-light-curtain/

The page includes product summaries, resolution guidance, housing comparisons, operating-range information, output options and application videos covering press guarding, robot-cell protection, narrow installations, washdown environments and perimeter layouts.

DAIDISIKE advises buyers to request documentation for the exact configuration being ordered. Statements such as “designed to a Type 4 architecture” describe the product design basis, but compliance decisions should rely on the certificate, manual and technical file associated with the specific model and configuration.

Every installation should begin with a documented machine risk assessment. Resolution, protective height, mounting distance, reset behavior, output architecture and stopping performance should be reviewed as parts of one complete safety function.

After installation, the complete protected area should be tested using the specified test piece. The commissioning process should confirm correct alignment, channel operation, stopping response, reset behavior, external device monitoring where applicable and prevention of unexpected restart.

About DAIDISIKE

Foshan DAIDISIKE Optoelectronics Technology Co., Ltd. develops industrial sensing and machine-safety products for equipment manufacturers, automation integrators and industrial facilities. Its product portfolio includes safety light curtains, press-protection systems, safety door interlocks, safety relays, safety mats, LiDAR scanners and industrial sensors.

Company: Foshan DAIDISIKE Optoelectronics Technology Co., Ltd.
Brand: DAIDISIKE
Product page: https://www.daidisensor.com/products/safety-light-curtain/
Phone / WhatsApp / WeChat: +86 152 1890 9599
Address: Factory 1002, Stair A, Building 5, Integrated Innovation and Science Park, Beijiao Town, Shunde District, Foshan, Guangdong, China