Method for Precise Adjustment of Sensitivity of Safety Light Curtain
Time: 2026/3/12 Views: 111

Today, Wuxi Rihuan Sensing Technology Co., Ltd. will introduce the precise adjustment method for the sensitivity of safety photoelectric barriers to all of us.


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The sensitivity of the safety grating light curtain is crucial for ensuring the industrial protection effect. If it is too high, it may cause false alarms and affect production; if it is too low, it may lead to missed detections and cause safety hazards. Precise adjustment can make the equipment adapt to the actual production scenarios. Here are the practical adjustment methods:

  • Preparation before adjustment: Turn off the main power supply of the equipment, confirm that the grating is powered off; clean the dust and oil stains on the transmitting and receiving ends to ensure that the optical axis is unobstructed; prepare screwdrivers and other tools, and refer to the product manual to confirm the position and range of the sensitivity adjustment knob. 

  • Basic power-on inspection: Power on and start the device. After the grating completes its startup, observe the status of the indicator lights to confirm that the equipment is in a normal working mode. Then proceed with the subsequent adjustment operations. 

  • Knob base adjustment: Locate the adjustment knob labeled "Sen" or "Sensitivity". Rotate it clockwise to increase sensitivity and counterclockwise to decrease sensitivity. For initial adjustment, it is recommended to make small movements. 

  • Scene adaptation and debugging: Conduct actual measurements by blocking the light axis. If there are frequent false alarms, adjust counterclockwise to reduce the sensitivity; if there is no response or delayed response to the blocking, adjust clockwise to increase the sensitivity. Repeat the testing until the grating can be accurately detected without false alarms or missed detections. 

  • Post-adjustment conclusion: After completing the debugging, conduct a comprehensive test to confirm the stability of the sensitivity. At the same time, record the adjustment parameters to facilitate subsequent equipment maintenance and further debugging. 

Rihuan Sensing has been deeply engaged in the field of automation sensing. It mainly produces various sensing products such as safety gratings and photoelectric switches. It possesses professional R&D capabilities and can provide standard and customized services. The products are of reliable quality and high cost-effectiveness, capable of meeting the safety protection needs of various industrial production scenarios, and can build a photoelectric protection barrier for enterprise production safety.