In the wave of smart city construction, geomagnetic sensors act as the perception nerve of intelligent transportation systems and play an increasingly critical role.
Whether for intelligent billing of roadside parking spaces or intelligent timing control of traffic lights, geomagnetic sensors continuously collect data to support the intelligent operation of cities. However, these precision outdoor devices face severe challenges:
- Waterproofing: Buried sensors suffer long-term erosion by rainwater.
- Temperature Aging: Extreme heat and cold cause material aging and cracking.
- Mechanical Stress: Road vibration and vehicle rolling pressure.
- Chemical Corrosion: Damage from snow melting agents and acid rain.
How to equip these “behind-the-scenes heroes” with a sturdy protective shield?
ELAPLUS PUR 1661 two-component polyurethane potting compound is specially developed to solve all these pain points.
1. Industry Pain Points & Challenges for Geomagnetic Sensors
1.1 Typical Application Scenarios
| Application Scenario | Functional Requirement | Typical Product |
| Roadside Parking Space | Parking occupancy detection & contactless payment | Parking Detector |
| Traffic Light Control | Vehicle arrival detection & intelligent timing | Vehicle Detector |
| Smart Parking Lot | Parking guidance & reverse car searching | Space Detector |
| Highway | Traffic flow statistics & event detection | Traffic Detector |
1.2 Core Requirements for Potting Materials
| Core Requirement | Specific Demand | Performance Standard |
| Fast Curing | Limited on-site construction time | Open time adjustable: 2~25 min |
| High Strength | Resist vehicle rolling pressure | Hardness: Shore A67 |
| Water & Moisture Resistance | Block water penetration | Extremely low water absorption |
| Weather Resistance | Long-term outdoor service | Excellent weatherability |
| Low-temperature Performance | Stable operation in cold regions | Superior low-temperature toughness |
| Electrical Insulation | Protect internal circuits | Outstanding insulation performance |
| Easy Application | Convenient outdoor operation | Pouch packaging & low viscosity |
2. Solution: PUR 1661 Polyurethane Potting Compound
2.1 Product Introduction
PUR 1661 is a two-component polyurethane potting material developed by ELAPLUS, customized for geomagnetic sensors and other outdoor electronic devices.
2.2 Six Core Advantages
| Advantage | Description |
| Fast Curing | Open time optional from 2 to 25 min, adaptable to different construction schedules |
| High Hardness | Shore A67 hardness, no deformation under frequent vehicle rolling |
| Pouch Packaging | Easy for outdoor use, no complicated equipment required |
| Low Viscosity | Good fluidity and workability, penetrates into every tiny gap |
| Water & Moisture Proof | Ultra-low water absorption, provides IP68 waterproof protection |
| Superior Weatherability | Excellent low-temperature flexibility, stable performance in extreme heat and cold |
2.3 Typical Technical Specifications
| Item | Technical Index |
| Type | Two-component polyurethane |
| Open Time | 2~25 min (adjustable) |
| Hardness | Shore A67 |
| Viscosity | Low viscosity, easy to apply |
| Packaging | Pouch type for convenient outdoor construction |
| Service Temperature | Wide temperature range with excellent low-temperature resistance |
| Electrical Insulation | Excellent and stable insulation performance |
3. Application Cases: Smart Parking & Traffic Control
3.1 Roadside Parking Application
Geomagnetic sensors are buried in parking lots to detect real-time occupancy status. PUR 1661 provides:
- Reliable waterproof protection, extending service life by 3–5 years
- Fast curing to shorten road closure time during construction
- High-strength protection against frequent vehicle rolling
3.2 Vehicle Detection for Traffic Lights
Geomagnetic vehicle detectors are embedded in road surfaces to detect vehicle arrival signals and optimize traffic light timing. PUR 1661 ensures:
- Stable sensor operation in humid environments
- Resistance to chemical corrosion from snow melting agents and acid rain
- No cracking under seasonal temperature changes
3.3 General Potting Solution for Outdoor Equipment
Besides geomagnetic sensors, PUR 1661 is also ideal for:
- Traffic signal control modules
- Smart street light controllers
- Environmental monitoring sensors
- Industrial outdoor control boxes
4. Why Choose ELAPLUS PUR 1661?
■ Stable QualityCertified with IATF16949, ISO9001 and other international quality systems for consistent reliable performance.
■ Leading TechnologyIndependent R&D team with continuous innovation and industry-leading core material technology.
■ Professional ServiceDedicated technical team provides product selection guidance and on-site application support with fast response.
■ Sufficient Production CapacityModern manufacturing base ensures ample output and stable long-term supply.
