Smart gas meters incorporate a large number of electronic components internally, and the potting compound must meet the following basic performance requirements to ensure stable device operation:

1. ‌ Protective performance ‌ It must be waterproof, moisture‑proof, dust‑proof, salt‑spray‑resistant, shock‑proof, and mold‑resistant, capable of withstanding demanding indoor or outdoor installation environments.
2. ‌ Electrical performance ‌ : Excellent insulation, non-conductive, resistant to spark discharge from electronic components, and does not interfere with the normal operation of gas meter wiring.
3. ‌ Environmental resistance ‌ : It exhibits stable thermal resistance, preventing stress‑induced cracking under temperature fluctuations, and also boasts excellent resistance to yellowing and UV degradation, ensuring consistent performance over long-term use.
4. ‌ Adhesion performance ‌ It exhibits excellent adhesion to common gas meter substrates such as metal, plastic, and glass, preventing the adhesive from peeling off and losing its effectiveness.
5. ‌ Safety and Environmental Protection ‌ : Prioritize choosing those that do not contain VOC Products that meet standards for organic volatile compounds and flame retardancy help reduce safety risks.

The following are recommended potting compounds tailored to the specific application areas of smart gas meters:

I. Sealed Protection Scenarios

‌ Application Site ‌ : Case sealing, sensor encapsulation, battery compartment waterproofing
 

Adhesive Compatibility and Properties ‌：

✅ ‌ Silicone sealant ‌： The high- and low-temperature resistance range can reach -40℃~200℃ , with excellent elasticity; recommended for use Hinnel New Materials HNSIL 736 Organosilicon adhesive sealant

✅ ‌ Polyurethane sealant ‌： Excellent wear resistance and superior shock-absorbing performance.

Core role ‌ : It prevents moisture ingress, thereby avoiding corrosion of the circuitry, while also preventing gas leaks, thus reducing safety risks at the source.

II. Electronic Component Mounting and Thermal Management Applications

Application Site ‌： PCB Board component fixation, communication module heat dissipation
 

Adhesive Compatibility and Properties ‌：

✅ Epoxy adhesive ‌： High bonding strength and excellent chemical resistance.

✅ Thermal conductive silicone grease ‌： Specifically adapted MCU In areas with high thermal‑dissipation requirements, such as chips, heat dissipation efficiency can be improved.
 

Core role ‌ : Prevent components from loosening or falling off due to vibration, ensuring stable communication signal transmission.

III. Battery Packaging Scenarios

‌ Application Site ‌ Insulation and fixation of lithium batteries and dry-cell batteries
 

Adhesive Compatibility and Properties ‌：

✅ Modified acrylic ester adhesive: Fast curing, low VOC content, and more safe and environmentally friendly.
 

Core role ‌ : Prevents battery loosening from causing power outages, thereby extending the overall service life of the gas meter.

IV. Sensor Bonding Applications

Application Site ‌ : Pressure / Adhesive sealing of the flow sensor to the pipeline
 

Adhesive Compatibility and Properties ‌：

✅ Anaerobic adhesive: It delivers excellent thread-locking performance and exhibits outstanding high-pressure resistance.

‌ Core role ‌ : Ensures accurate sensor data acquisition while eliminating the risk of gas leakage at bonded joints.

In summary, smart gas meters operate in complex and variable environments, necessitating the selection of potting compounds that account for the specific operating conditions of various components, such as circuit boards, sensors, and battery compartments. It not only provides protective functions such as waterproofing, electrical insulation, shock absorption, and resistance to gas‑induced corrosion, thereby ensuring stable metering accuracy, but also reduces post‑sale failures and extends the service life of smart gas meters.

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