一、 Core components
1，Optical lenses:
Material: Made of tempered glass, usually borosilicate glass (high-temperature resistant glass) or quartz glass that has been tempered.
Function: Provide a transparent observation window to withstand internal and external pressure.
Key features: high strength, heat-resistant impact, high safety (in granular form after crushing, reducing damage).,
2，Mirror seat/compression ring:
Material: 304 or 316L stainless steel. This is the core of the entire introduction.
Function: Fix and protect the glass lens, and ensure the sealing of the entire component through sealing components. Usually equipped with bolt holes for installation onto equipment.
3，Sealing element:
Material: Typically, PTFE gaskets, graphite gaskets, or metal gaskets (such as stainless steel with graphite wrapped gaskets) are used.
Function: To prevent the medium inside the device from leaking through the gap between the glass and the mirror holder.
二， Main features and advantages
1，Excellent corrosion resistance: The 304/316L stainless steel mirror holder can resist corrosion from various chemical media, ensuring the longevity and integrity of the mirror structure.
2，High mechanical strength: Tempered glass lenses themselves have high strength, combined with a sturdy stainless steel mirror holder, which can withstand high system pressure and external impacts.
3，Excellent thermal stability: Tempered glass (especially borosilicate material) has a low coefficient of thermal expansion and can withstand large temperature changes without breaking. Stainless steel mirror holders can also maintain strength at high temperatures.
4，High safety: Tempered glass belongs to safety glass. In case of rupture due to overpressure or overheating, it will break into small particles without sharp edges, greatly reducing the risk of personal injury and secondary damage to equipment.
5，Cleanliness and Hygiene: Especially 316L stainless steel, due to its excellent corrosion resistance and resistance to contaminating media, is widely used in industries with high hygiene requirements such as food, pharmaceuticals, and biotechnology.
6，Long service life: Under suitable working conditions, this combination of mirrors has a very long service life and low maintenance costs.
三， Typical application areas
Chemical and petrochemical industries: reaction vessels, storage tanks, and pipelines are used to observe material reactions, liquid levels, and flows. (Strongly recommend 316L)
Pharmaceutical and Bioengineering: Bioreactors, ingredient tanks, purification systems, requiring sterility and corrosion resistance. (316L is the standard choice)
Food and beverage industry: fermentation tanks, milk storage tanks, pipelines to ensure products are not contaminated.
Water treatment and environmental engineering: filtration tanks, sewage treatment equipment.
Energy and power industry: boiler water level gauge, thermal system observation window.
