Recommended sealant for rain sensor: PUR 1680 two-component sealant

Application background of rainfall sensorsRainfall sensors are widely used in various fields such as meteorological monitoring, intelligent agriculture, urban drainage systems, and climate research. With the development of intelligent technology, rainfall sensors have gradually acquired more precise detection capabilities, and higher requirements have been put forward for their waterproof, stability, and durability. Especially in outdoor environments, sensors face many challenges such as strong weather changes, humidity erosion, and physical collisions. Therefore, protecting the sensitive components of sensors and ensuring their long-term stable operation has become an important part of the design and manufacturing process. The importance of sealant in rain sensorsThe use of sealant can effectively protect the electrical components inside the sensor, prevent the invasion of moisture, dust, corrosive substances, and other external factors, and extend the service life of the product. In addition, potting adhesive can also improve the vibration and impact resistance of sensors, ensuring their normal operation in harsh environments.Rainfall sensors generally involve various complex electrical components, such as circuit boards, sensor elements, and connecting wires. Waterproof, corrosion resistance, and good mechanical protection are essential characteristics of sealant in this field. Rainfall sensor encapsulationTechnical requirements for sealing adhesiveFor rain sensors, choosing the appropriate sealing adhesive is crucial. The main technical requirements include:Waterproof performance: As the rain sensor is exposed to the external environment, waterproof performance is crucial. The sealant must be able to resist rainwater infiltration and maintain good sealing performance.Flexibility and moderate hardness: Rain sensors typically contain sensitive electronic components, so the hardness of the sealant should not be too high to avoid pressure or damage to the components. Excessive hardness may cause damage to the sensor components or brittle cracking of the packaging layer. It is more appropriate to control the hardness within 60D, which can balance mechanical protection and component safety.Low mixing viscosity:…