Waterproof NTC Temperature Sensors(Epoxy Type)

Water resistance is one of the most critical performance indicators for NTC temperature sensors in harsh operating environments. At POLO Sensor, we have developed a full set of advanced waterproofing and sealing technologies to significantly improve the stability, reliability, and service life of temperature sensors under high humidity, moisture, water immersion, and outdoor conditions.

1. Material Optimization for Waterproof Performance

We use high-performance fluorosilicone, epoxy resin, and thermosetting sealing materials with excellent hydrophobicity and insulation properties. These materials form a tight protective layer that blocks moisture penetration while maintaining stable thermal conductivity and temperature measurement accuracy.

2. Hermetic Sealing & Structural Design

Our waterproof ntc sensors adopt a multi-stage sealing structure:

• Hermetically sealed thermistor chip

• Double-layer insulation coating

• Sealed cable transition area

• Fully encapsulated probe structure

This design effectively eliminates gaps and micro-channels that could allow water vapor or liquid to enter the sensing element, ensuring stable resistance and temperature response even under long-term moisture exposure.

3. Enhanced Cable & Joint Waterproofing

The connection between the sensing probe and the lead wire is a typical weak point for water intrusion. We reinforce this section with:

• Integrated injection molding

• High-density adhesive filling

• Waterproof cable jacket

This ensures reliable performance in applications such as outdoor equipment, automotive under-hood environments, refrigeration systems, HVAC, and water heaters.

4. High Waterproof Rating Achieved

Through the above technologies, our standard ntc temperature sensors can reach IP67 or IP68 waterproof levels:

• IP67: Dust-tight, protected against immersion in water up to 1 meter for 30 minutes

• IP68: Dust-tight, protected against continuous immersion in water under defined pressure and depth

5. Performance Advantages

• Stable resistance and accuracy in high-humidity environments

• Excellent anti-condensation and waterproof performance

• High mechanical strength and corrosion resistance

• Long-term durability in harsh industrial conditions

• Wide operating temperature range

• Customizable waterproof structures for special applications

Our waterproof-enhanced ntc temperature sensors provide reliable temperature detection and feedback for home appliances, automotive electronics, new energy, industrial control, medical devices, and communication equipment. With professional design, strict production control, and reliable testing, POLO Sensor ensures that every product delivers consistent performance even in the most demanding wet environments.