Application background of rainfall sensors
Rainfall 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 sensors
The 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 encapsulation
Technical requirements for sealing adhesive
For 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: The mixing viscosity of the sealing adhesive should be low in order to cover the internal structure of the sensor more evenly during the sealing process, ensuring that every detail is fully protected. Low viscosity can also improve production efficiency and reduce operational difficulty.
Adhesive properties: The potting adhesive must have good adhesion to the sensor substrate (such as metal, plastic, or ceramic). Only by ensuring a firm bond can the encapsulation material be prevented from peeling off during use.
Recommended product: PUR 1680 two-component sealant
PUR 1680 A/B is a two-component solvent-free room temperature or heat cured resin elastomer composite used for two-component sealing and filling. The raw materials are free of heavy metals, environmentally friendly, and have a wide range of process operability. The finished product has high physical properties and good adhesion to the substrate. It can be cured at room temperature or by heating, and can be deeply cured. The two-component mixture has good fluidity and excellent flexibility after curing. It is used for casting and sealing of communication equipment, transformers, control power supplies, ignition controllers, electronic sensors, etc.
PUR 1680 polyurethane sealant characteristics:
Low viscosity, strong operability
Excellent low-temperature characteristics and outstanding weather resistance
Excellent electrical insulation and stability stability
Good waterproof and moisture-proof properties, with extremely low water absorption rate
Has good adhesion to most metals and plastics
PUR 1680 two-component potting adhesive has become an ideal choice for potting rain sensors due to its excellent waterproof performance, moderate hardness, low mixing viscosity, excellent adhesion, and long-term stability after curing. It can effectively protect the internal components of sensors, ensuring stable operation under adverse weather conditions, thereby providing reliable technical support for fields such as meteorological monitoring, agricultural irrigation, and smart city construction.
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Tags: Sensor Encapsulation compound · Rain Gauge Sensor Encapsulation · Encapsulation compound · Polyurethane potting compound
