Beware of Blind Rescue in the Summer to Strengthen Protection of Limited Space Systems

Summer is a high-risk period for confined space accidents. According to statistics, between June 3 and June 8 over the past five years, nine major poisoning and asphyxiation incidents occurred in construction and industrial sectors, with eight of them taking place in confined spaces. Seven of these accidents involved improper rescues by employees. In 2013, there were five fatal incidents in Beijing due to confined space operations, four of which occurred during the hot months of June to September. Experts have raised concerns about this trend. Why are confined space accidents more frequent in summer? Gao Hong, director of the Industrial Safety Production Research Institute under the Ministry of Industry and Information Technology, explained that summer brings a surge in construction activities across various industries, including increased troubleshooting and maintenance. Additionally, high temperatures and low pressure hinder the dispersion of toxic gases in confined areas, leading to operator fatigue and reduced willingness to wear protective gear. This makes it harder to maintain safety and effective operations. News reports on confined space accidents are common, prompting regions to implement stricter safety measures. For example, State Grid Beijing Power Supply Company organized training sessions for confined space operations, covering procedures, safety protocols, and on-site management. In Hangzhou, Zhejiang Province, a two-month safety campaign was launched for industry and trade companies, focusing on rectification of all confined space operations—whether regularly used, temporarily used, or handled by third parties. Chongming County’s Safety Supervision Bureau in Shanghai held meetings to promote confined space safety, emphasizing the need for improved management based on past accident trends. Meanwhile, the Ningxia Safety Production Education Center conducted a five-day training program for over 200 workers, part of a broader initiative to train 1,200 special operators for free this year. Despite these efforts, many accidents still occur due to improper rescue. In 2013, over 40% of industry accidents happened in confined spaces. Recent examples include a tragic incident in Guangxi where three workers died after being poisoned while pumping water in a tunnel. Another case in Shaanxi saw four people lose their lives after an employee fell into a pulp pool and others tried to rescue him without proper precautions. Experts point out three main challenges: the widespread presence of confined spaces across industries, weak supervision, and subcontracting issues that lead to poor safety practices. Gao Hong emphasized that confined space work is highly dangerous, with serious consequences when accidents happen. From 2010 to 2013, there were 67 such incidents nationwide, resulting in 269 deaths. To prevent such tragedies, strict adherence to operating procedures and enhanced safety management are essential. The State Administration of Safety Supervision has issued regulations to improve safety, including risk assessments, testing, and training. Experts also recommend using technology like sensors and gas detectors to monitor conditions in real-time. Confined spaces can accumulate harmful gases, lack oxygen, or contain flammable materials, posing severe risks. Proper detection and ventilation are crucial before any operation. Companies must provide adequate protective equipment and ensure workers are trained in emergency response. Rescue attempts should never be done without proper protection, and professional help should always be sought in complex situations. In conclusion, confined space operations require strict compliance, continuous education, and technological support to minimize risks. As the saying goes, "Safety first" should never be overlooked.

Optical IR Turbidity Sensor

Overview

An Optical Turbidity Sensor, also referred to as an Optical Turbidity Probe, is a sensor designed to measure the turbidity level in liquids by analyzing how light interacts with suspended particles. Turbidity is a critical parameter in water quality monitoring, as it reflects the presence of contaminants such as sediments, microorganisms, and organic matter. Accurate turbidity data is essential for environmental protection, process control, and compliance with regulatory standards in water and wastewater management. 

Optical Principles: Infrared and Laser Scattering Technologies

The optical measurement method employed by turbidity sensors is based on the interaction of light with particles in the water. Two common optical principles are used. The first is infrared light scattering at a wavelength of 860 nm, where the sensor emits infrared light and measures the light scattered by particles at specific angles. This method is widely used due to its immunity to color interference and its compliance with the ISO 7027 standard. It ensures stable and reliable readings in a variety of conditions. 

The second principle uses laser scattering, typically at a wavelength of 660 nm. Laser-based turbidity sensors offer higher sensitivity and can detect extremely low turbidity levels. They are ideal for applications where high-resolution measurement is required, such as in ultrapure water monitoring or quality control in beverage production. The narrow beam of laser light improves measurement focus and minimizes background noise. 

 

Key Features and Advantages

Optical Turbidity Sensors provide several technical benefits compared to traditional nephelometric or manual sampling methods. They offer continuous real-time measurement, high precision, and low maintenance due to their contactless optical design. Many models are equipped with automatic cleaning systems—such as wipers or ultrasonic cleaners—to prevent fouling and maintain long-term accuracy. Optical sensors also demonstrate strong stability over time and resistance to environmental drift, making them suitable for harsh operating environments. 

Additional advantages include digital output compatibility (such as RS485 with Modbus protocol), user-configurable calibration, and robust sensor housing made from corrosion-resistant materials like stainless steel or PVC. These features enhance their adaptability in both portable and fixed installation systems. Integration with SCADA or PLC systems is straightforward, enabling automated control and data logging. 

Typical Applications

Optical Turbidity Sensors are widely used across various industries and environmental applications. In municipal water treatment plants, they monitor the clarity of drinking water and the performance of filtration units. In wastewater treatment facilities, they track effluent quality to ensure regulatory compliance. The aquaculture industry uses turbidity monitoring to maintain optimal living conditions for aquatic species by controlling feed residues and suspended solids. 

In industrial processing, such as in food and beverage production or chemical manufacturing, Optical Turbidity Sensors help control process water clarity and product consistency. Environmental agencies and research institutions also deploy these sensors for river and lake monitoring, sediment transport studies, and climate-related water quality assessments. Their flexibility and accuracy make them essential tools in modern water quality management systems. 

 

Conclusion

When precision and reliability are critical, Daruifuno Optical Turbidity Sensors deliver proven performance. Built on advanced optical measurement technologies, our sensors are engineered for accuracy, durability, and operational efficiency. We offer cost-effective pricing without compromising quality. All models support OEM and private labeling, and we provide customized solutions to meet unique technical or industrial needs. 

Daruifuno is committed to providing professional-grade sensors that integrate easily into your systems and meet international standards. Whether for regulatory monitoring or industrial process optimization, Daruifuno ensures that your turbidity measurements remain accurate and consistent over time.

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Suzhou Delfino Environmental Technology Co., Ltd. , https://www.daruifuno.com