Outdoor Temperature Sensor PT100 4-Wire with Sun Protection (IP65)

Precise Readings, All Year Long

When it comes to outdoor temperature measurement, precision is easily lost in translation—especially under direct sunlight. The Andivi Outdoor Temperature Sensor PT100 4-Wire with Sun Protection brings accuracy back into focus, offering reliable, repeatable readings for any outdoor environment. Designed as a passive sensor, it measures air temperature while actively resisting radiant distortion. The integrated sun protection sleeve safeguards the sensing element from solar radiation, ensuring the values recorded mirror the true ambient conditions.

This sensor isn’t just another box on the wall—it’s an instrument built with purpose and practicality, ideal for HVAC engineers, energy management systems, and weather monitoring setups that demand consistency and resilience.

Radiant Heat, Redirected Smartly

What makes Andivi’s design shine—ironically—is its ability to deal with sunlight. The integrated feeler tube acts as a miniature shade, diverting radiant heat before it interferes with the sensor element. The result is measurably higher accuracy even in direct or reflected sunlight. This small but critical design choice mirrors what meteorological experts emphasize: protect your sensor from the sun, or your readings will drift upward like a mirage.

Whether installed on external walls, rooftops, charging stations, or public infrastructure, the sleeve ensures accuracy without compromise—a subtle design solving one of outdoor measurement’s biggest sources of error.

The 4-Wire Precision Advantage

The PT100 4-wire configuration isn’t just an engineering choice; it’s an accuracy guarantee. By using separate signal and sense leads, the 4-wire connection eliminates errors caused by lead resistance, which can distort readings over long cable distances or with thin wiring. This makes the 4-wire variant particularly suited for industrial applications, data centers, and distributed automation systems, where exact temperature gradients matter.

Real-life use examples:

• District heating or cooling stations, where long signal cables require compensation-free transmission.

• Outdoor electrical or EV infrastructure, where environmental data feed into power control systems.

• Building automation networks, where integration precision improves HVAC balancing.

Andivi manufactures custom configurations—whether 2-wire, 3-wire, or 4-wire—for OEMs and project-specific requirements. From sensor element type (PT100, PT1000, NTC) to housing shape, we can tailor any specification to fit a project’s electrical or mechanical needs. Flexibility, in this case, doesn’t come at the cost of precision—it enhances it.

Measuring Outdoors—with Intelligence

Outdoor sensors are exposed to everything: rain, frost, blazing sunshine, and more. The ANDAUTFEXT2 was built to thrive in these conditions. As a passive outdoor temperature sensor, it converts the resistance of its platinum element into temperature values without any internal amplification—simple, stable, and durable.

Common use cases include:

• Smart HVAC systems: Optimizing air handling or heat pump performance based on outdoor air feedback.

• Weather stations and smart city projects: Providing data inputs for environmental dashboards.

• Renewable systems: Measuring air input temperatures for solar or geothermal control systems.

• Industrial tiers: As part of safety monitoring systems exposed to changing ambient conditions.

The sun-protected feeler sleeve plays a key role in all these use cases, shielding the measuring element and ensuring response times stay within spec across weather conditions.

The PT100 Sensor Explained – Dependability in Platinum

At the heart of this device lies the PT100—a platinum resistance temperature detector (RTD) known for its linearity, accuracy, and stability. The “100” denotes 100 ohms at 0°C, and as the temperature rises, so does its resistance—following a precisely defined curve. According to research and industry consensus, PT100 sensors maintain long-term stability, resist corrosion, and handle temperature ranges from -50°C up to +100°C with confidence.

Compared to thermocouples or NTC sensors, PT100 devices have noticeably lower drift, providing consistent calibration over years. For building automation, that means fewer recalibrations and more reliable data. Platinum’s resistance characteristics also ensure measurement repeatability, crucial in energy-efficient HVAC control.

Technical Specifications

IP65 Protection: Strength Meets Reliability

The IP65 rating gives this sensor armored defense against the elements. The “6” means it’s dust-tight—no ingress of particles even in dry, windy, or sandy conditions. The “5” ensures it can withstand water jets from any direction. In practical terms, this guarantees reliability across marine docks, rooftops, tunnels, and industrial enclosures.

With an IP65 housing, a technician can mount it outdoors without worrying about corrosion or particulate contamination. Combined with sun protection, it’s a design built for low maintenance and high durability, operating in environments where other sensors surrender to the weather.

Where Reliability Meets Craft

Andivi’s PT100 sensors represent a fusion of precision engineering and practical field experience. Each sensor is built not just to measure temperature but to withstand reality—with radiant shielding, solid-state performance, and customizable wiring options. Whether you need 4-wire accuracy for long cable runs or a compact 2-wire passive variant for shorter installations, Andivi can fine-tune performance to your system’s specifications. For companies requiring rugged yet accurate outdoor temperature data, this device brings both elegance and endurance to the table.

For further discussion or project inquiries, you can visit Andivi our contact page —whether for custom-built PT100, NTC, BACnet or Modbus sensors with sun protection. After all, when it comes to smart measurement, even sunlight can’t outshine precision.