Outdoor measurement systems depend on stable data. Temperature and humidity values influence control logic, reporting, and long-term performance analysis. Outdoor exposure creates a problem. Direct sunlight heats sensor bodies, rain alters surface conditions, and airborne dust interferes with readings. A radiation shield for sensors addresses these problems in a controlled and measurable way.
This article explains what a radiation shield does, why it matters for outdoor environmental sensors, and how the MBMet-702 Radiation Shield supports accurate measurement. All technical details come from MB Control’s published product and system information.
A radiation shield is a physical enclosure installed around a temperature or humidity sensor. Its purpose is narrow and technical. It blocks direct solar radiation and precipitation while allowing ambient air to move freely around the sensing element.
Direct sunlight causes a sensor housing to absorb heat. The sensor then measures its own warmed surface instead of the surrounding air. This produces elevated temperature readings and distorted relative humidity values. A radiation shield prevents this effect by shading the sensor from solar exposure.
Source: MB Control, MBMet-702 Radiation Shield product documentation.
The MBMet-702 Radiation Shield uses a stacked louvered plate design. Each plate blocks direct sunlight from above and from low sun angles. Gaps between plates allow airflow. Heat does not build up inside the shield, and the sensor remains exposed to ambient air rather than trapped warm air.
This balance between shading and ventilation is the core function of a radiation shield. Without it, even high-quality sensors report biased data when deployed outdoors.
Outdoor environments introduce repeatable measurement errors. These errors do not come from sensor electronics. They come from exposure conditions.
Sunlight heats exposed sensor housings. This raises measured temperature above actual air temperature. The error increases during clear skies and midday sun. A radiation shield blocks this direct energy input and reduces solar heating of the sensor body.
Relative humidity depends on temperature stability. When a sensor warms due to sun exposure, the calculated humidity value drops even if moisture content remains constant. This creates artificial humidity swings. With proper temperature humidity sensor protection, humidity readings stay aligned with ambient conditions.
Rain, snow, and dust interfere with sensor surfaces. Water droplets temporarily raise humidity readings. Dust coats sensing elements and slows response time. A radiation shield physically blocks precipitation and debris without sealing the sensor away from airflow.
MB Control systems often deploy multiple sensors across a site or across many sites. Data comparison requires similar exposure conditions. A radiation shield standardizes sensor exposure so each sensor operates under comparable thermal conditions.
The MBMet-702 Radiation Shield is designed for permanent outdoor installations that require reliable environmental data. Its design and specifications focus on durability, airflow, and compatibility with MB Control sensor systems.
The shield consists of stacked, louvered plates arranged vertically. This structure blocks direct solar radiation from multiple angles. It also limits radiant heat transfer from nearby structures or ground surfaces.
Air enters freely through the plate gaps. Heated air exits without restriction. The sensor remains in continuous contact with ambient airflow.
The plates are manufactured from UV-resistant polycarbonate. This material resists discoloration and degradation from long-term sun exposure. Stainless steel hardware secures the assembly and resists corrosion in wet or coastal environments.
The shield supports operation from −40 °C to +70 °C. This range allows deployment in cold climates and high-temperature locations. The structure withstands wind speeds up to 75 m/s, which supports installation in exposed outdoor areas.
The enclosure meets IP65 protection. Dust does not enter the protected volume, and water jets do not affect internal components.
The MBMet-702 supports pole mounting with standard 30 to 40 mm diameters. This simplifies installation alongside MB Control temperature and humidity sensors. Existing poles and weather stations do not require modification.
A temperature and humidity sensor does not measure conditions instantly. It exchanges heat and moisture with surrounding air. Any external heat source interferes with this exchange.
The MBMet-702 improves temperature humidity sensor protection in several measurable ways:
– Direct sunlight never contacts the sensor body.
– Radiant heat from nearby surfaces is reduced by shading geometry.
– Airflow prevents thermal buildup inside the enclosure.
– Precipitation does not wet the sensing element.
These factors work together. Each factor alone reduces error slightly. Combined, they stabilize readings across daily and seasonal cycles.
MB Control supplies sensors and systems for industrial weather monitoring. These systems combine wind, solar, temperature, humidity, and pressure measurements.
Wind sensors such as the MBMet-100 operate in the same environment as temperature sensors. Accurate temperature data helps interpret wind cooling effects on equipment and structures. A radiation shield keeps temperature readings free from solar bias.
Solar irradiance sensors such as the MBMet-502 measure incoming solar energy. Temperature sensors nearby must reflect true air temperature, not solar heating of the sensor housing. A radiation shield separates these two measurements clearly.
MB Control weather stations for electrical substations rely on accurate ambient conditions. Temperature and humidity data feed thermal models and operational limits. A radiation shield supports consistent readings under all weather conditions.
Sensors remain exposed year-round. Sun angle, weather, and seasonal changes vary. A radiation shield maintains stable exposure conditions across these changes.
Protection from dust and precipitation slows contamination of sensor surfaces. Sensors retain response accuracy for longer periods before service is required.
Environmental reporting depends on traceable, repeatable measurements. Shielded sensors reduce systematic bias that can appear in audits or compliance reviews.
MB Control’s design choices indicate what matters in a radiation shield:
– Louvered geometry that balances shade and airflow
– UV-resistant materials suited for continuous outdoor exposure
– Mechanical strength for high wind environments
– Mounting compatibility with standard sensor installations
The MBMet-702 reflects these criteria directly in its specifications.
The MBMet-702 is designed for outdoor temperature and humidity sensors used in MB Control weather monitoring systems. It mounts on standard poles and integrates with common sensor housings supplied by MB Control.
No. The louvered plate structure allows continuous airflow. This airflow is required for accurate temperature and humidity measurement and is central to the shield’s design.
The shield installs outdoors on poles or weather stations. It is used in renewable energy sites, electrical substations, and industrial weather monitoring systems supplied by MB Control.
A radiation shield performs a focused role. It controls sensor exposure so measurements reflect ambient conditions rather than environmental interference. The MBMet-702 Radiation Shield from MB Control applies this principle through defined materials, airflow geometry, and environmental ratings. For outdoor environmental sensors, this form of protection supports accurate, repeatable data across real operating conditions.