With the continuous development of smart devices and automotive electronics technology, temperature sensors, as an important component, are playing an increasingly critical role. It is crucial to provide sufficient protection to ensure the stable operation of temperature sensors in various complex and harsh environments. Especially for external triple protection, sensors not only need to be waterproof, dustproof, and corrosion-resistant, but also need to resist external physical impacts. Therefore, selecting appropriate potting materials for external protection has become the key to improving sensor performance and extending its service life.
Background
In modern industries, automobiles, and home appliances, temperature sensors are widely used in important equipment such as monitoring systems, smart homes, and automotive engine control. They are usually installed in areas with harsh working environments, such as engine compartments, battery packs, climate monitoring equipment, etc. The temperature changes, moisture, dust, and external impacts in these areas can pose a certain threat to the sensors. In order to improve the stability and durability of sensors, it is crucial to adopt external three proof protection.
External triple protection refers to providing sensors with the ability to resist water, dust, and corrosion, which requires sealing or coating to achieve. The external three proof protection material of the temperature sensor not only needs to have high-strength physical properties, but also needs to have high adhesion and toughness to prevent external damage and physical impact.
In this process, the selection of sealing materials is particularly crucial, ensuring that their viscosity is moderate and can evenly cover the outer surface of the sensor, while also possessing excellent hardness and mechanical properties to resist wear and external impacts during long-term use.
Challenge
When selecting external three proof protection materials for temperature sensors, we encountered the following main challenges:
Viscosity requirements
The external protection of temperature sensors requires a material with moderate viscosity to evenly coat the sensor surface, ensuring that the protective layer has no dead corners and can completely cover every inch of the surface. However, excessively high viscosity may make it difficult for the material to penetrate uniformly, while excessively low viscosity may affect its adhesive strength and protective effect.
Hardness requirements
Due to the fact that temperature sensors are usually exposed to external forces in the working environment, the external protective layer must have sufficient hardness to prevent external impact or friction damage to the sensor. Materials with insufficient hardness may cause the protective layer to crack or peel off, thereby affecting the working performance of the sensor.
Uniform coating
The surface shape of temperature sensors is usually irregular, so a material that can be uniformly immersed and coated is needed to ensure that their surface is fully protected. Especially during the coating process, the flowability and surface adhesion of the material are very important.
Environmental resistance
Temperature sensors often work in harsh environments such as temperature fluctuations, humidity, and dust, so their external protective layer must have excellent resistance to moisture, dust, and chemical corrosion to ensure their stability and reliability in long-term use.
Solution
In response to the above challenges, we recommend using EP 1708 epoxy sealant as the external three proof protective material for the temperature sensor. EP 1708 is a two-component epoxy resin adhesive with two curing methods: room temperature curing and heating curing, suitable for protecting electronic products in various industrial fields.
Product features:
▶ Resist moisture, dirt, and other atmospheric components
▶ High strength, excellent adhesion, crack resistance, and toughness
▶ Confidentiality, solvent-free, and no solidification by-products
▶ Stable mechanical and electrical performance between -45 and 100 ℃
