In automotive electronics, the Mass Air Flow Sensor (MAF) is one of the core components in the engine control system. It helps ECU accurately calculate fuel injection quantity by measuring the volume or mass of air entering the engine, thereby optimizing combustion efficiency and emission control.
Air flow meters typically operate near the engine intake duct in complex environments such as high temperatures, fuel vapors, moisture, and strong mechanical vibrations. If its lead packaging is unreliable, signal interference, failure, and even safety hazards may occur. Therefore, choosing the appropriate sealing adhesive becomes the key to ensuring its long-term stable operation.
Application Challenge
During the lead sealing process of the air flow meter, the customer made the following typical requirements:
Resistant to 80 ℃ gasoline
If the lead is exposed to the volatile environment of gasoline for a long time, if the colloid is not resistant to oil, it is easy to swell and crack, leading to electrical failure.
Low viscosity, easy to penetrate
The sealing adhesive should be able to flow to small gaps, avoid bubbles and voids, and ensure insulation and sealing effect at the lead.
White appearance
White colloid is convenient for detecting the uniformity of encapsulation, and also meets aesthetic and identification requirements in certain situations.
Recommended solution – EP 1702W white low viscosity potting adhesive
For the special requirements of air flow meters, it is recommended to use EP 1702W sealant.
Product Features:
Chemical resistant media: Excellent resistance to gasoline, lubricants, moisture, etc., maintaining stable performance even in gasoline at 80 ℃;
Low viscosity design: With excellent fluidity, it can easily fill the narrow gaps around the leads, reducing the risk of bubbles;
Electrical insulation: After curing, a dense insulation layer is formed, effectively preventing short circuits and leakage;
Advantages of curing: It can be cured at room temperature, has low heat release, low volume shrinkage rate, and avoids stress damage;
Bright white appearance: Not only is it convenient for quality inspection, but it also enhances the overall aesthetic of the craftsmanship.
View the details of EP 1702 epoxy potting adhesive
Application effect
After practical application verification:
EP 1702W maintains good strength and insulation after long-term immersion in gasoline environment;
The sealing process is smooth, and the low viscosity significantly reduces the difficulty of operation and rework rate;
After curing, the surface is smooth and shiny, meeting the dual requirements of customers for appearance and performance.
The sealing of the air flow meter lead is not only a simple sealing action, but also related to the reliability and safety of the automotive engine system. Choosing the appropriate sealing material is necessary to ensure stable operation under complex working conditions.
1702W white low viscosity sealing adhesive, with its advantages of gasoline resistance, excellent insulation, and low viscosity penetration, has become an ideal solution for sealing the leads of air flow meters.
Tags: Lead Sealing and Fixation · Epoxy Sealing Adhesive · Electronic Sealing Adhesive · White Sealing Adhesive · Air Flow Meter Lead Sealing
