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Thermal imaging camera seals Description
The seal of the thermal imaging camera is an important part of it, and the following is a detailed introduction to it:
Function
Dustproof and waterproof: The working environment of the oil and gas industry is often harsh, with a large amount of dust, oil, and moisture. The seal can effectively prevent these impurities from entering the thermal imager, avoid contamination and damage to the optical system of the instrument, detector, and other key components, and ensure the normal operation of the instrument and imaging quality.
Moisture-proof and anti-corrosion: prevent the water vapor in the air from entering, prevent the internal components from being damp rusty, and corroding, to prolong the service life of the instrument, especially in some areas with high humidity or offshore oil platforms and other environments, the moisture-proof function is particularly important.
Keep the temperature stable: It helps to maintain the temperature stability inside the instrument and reduces the impact of external temperature changes on the performance of the instrument. Because thermal imaging cameras are sensitive to temperature, drastic temperature changes can lead to problems such as inaccurate imaging and reduced detector performance, and good seals provide a relatively stable internal environment.
Electromagnetic shielding: Some seals also have a certain electromagnetic shielding function, which can reduce the impact of external electromagnetic interference on the instrument, ensure the stability of the electronic components and signal transmission of the thermal imager, and ensure the accuracy and reliability of imaging.

Material
Rubber: such as nitrile rubber, silicone rubber, etc. Nitrile rubber has good oil resistance, abrasion resistance, and water resistance, and is suitable for the environment that may be exposed to oil in the oil and gas industry; Silicone rubber has excellent high-temperature resistance, low-temperature resistance, and good elasticity, and can maintain sealing performance in a wide temperature range, and can adapt to temperature changes in different regions and seasons.
Plastics: such as polytetrafluoroethylene (PTFE), etc. PTFE has a very low coefficient of friction, good chemical stability, and corrosion resistance, is not prone to chemical reactions with other substances, and is self-lubricating, which can reduce friction between seals and instrument components, prevent wear, and effectively prevent erosion by various chemicals.
Metals: such as stainless steel, copper, etc. Metal seals have high strength and hardness, and are suitable for areas that are subjected to high pressures and high temperatures, providing reliable sealing results. At some junctions where high-precision sealing is required, metal seals ensure the tightness and stability of the instrument.
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Nitrile rubber |
Silicone rubber |
FKM |
PTFE |
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Density: approx. 0.96-1.2g/cm³. Hardness: 40-90 Shore A. Tensile strength: ≥10MPa. Elongation at break: ≥300%. Operating temperature range: -10°C to 150°C. |
Density: approx. 1.1-1.3g/cm³. Hardness: 30-80 Shore A. Tensile strength: ≥5MPa. Elongation at break: ≥200%. Operating temperature range: -60°C to 200°C. |
Density: about 1.8-2.0g/cm³. Hardness: Shore A hardness 60-90 degrees. Tensile strength: ≥15MPa. Elongation at break: ≥150%. Operating temperature range: -20°C to 200°C. |
Density: about 2.1-2.3g/cm³. Hardness: Shore D hardness is 50-70 degrees. Tensile strength: ≥15MPa. Elongation at break: ≥150%. Operating temperature range: -190°C to 250°C. |
Common installation locations
Housing connection: The shell of the thermal imager is usually assembled by multiple parts, and seals are installed at the junction of these parts, such as between the upper and lower shells of the instrument, the connection between the lens and the fuselage, etc., which can prevent external impurities from entering the instrument from these gaps.
Around the keys and interfaces: the buttons, power interfaces, data transmission interfaces, and other parts of the instrument also easily enter the water and dust, and the installation of seals around these parts, such as rubber seals or gaskets, can effectively prevent impurities from entering the instrument through these openings, and also ensure the normal operation of the keys and the good connection of the interface.
Around the detector protection window: The detector is the core component of the infrared thermal imager, and its protection window needs to be tightly sealed with the main body of the instrument to prevent dust, water vapor, etc. from affecting the performance of the detector. Special sealing structures and seals are usually used to ensure a tight seal between the window and the instrument without affecting the transmittance of infrared light.
Maintenance & Replacement
Regular inspection: The seals should be inspected regularly to see if there is damage, aging, deformation, or looseness. If there are signs of cracks, breakage, hardening, or loss of elasticity on the surface of the seal, it should be replaced in time to ensure the sealing performance of the instrument.
Cleaning and maintenance: During the inspection process, clean the seals to remove dust, oil, and other impurities on the surface. Use a clean, soft cloth to gently wipe,e and avoid using sharp or rough tools to damage the surface of the seal.
Correct replacement: When replacing the seal, choose the same product as the original seal specification and model, and ensure that its size, material, and performance match the instrument. Replace according to the correct installation method, and ensure that the seals are installed in place without twisting, deformation excessive clearance, and other problems to ensure a good sealing effect.
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