Aspirated Radiation Shield
Accurate measurement of air temperature
Beeservices indai fan-aspirated radiation shield works with several temperature and humidity sensors to provides research-grade measurements with minimal power consumption. It is ideal for solar-powered sites.
Rugged, Low Power Fan
The fan has an ingress protection (IP) rating of 55, virtually eliminating moisture and dust ingress. At full speed the power requirement is 1 W (80 mA at 12 V DC). To conserve power fan speed can be reduced, via pulse width modulation (PWM), to 0.3 W at night or when wind speed is greater than 3 m s-1 without loss of accuracy. If the fan is continuously operated at full speed lifetime is rated at 50,000 hours (5.7 years). The fan includes a tachometer, allowing RPM to be mounted to detect obstruction of the fan.
Aerodynamic Shape
The curved inlet facilitates the reduction of air into the shield through the Coandã effect (tendency of fluid to follow a convex surface). The tapered diameter of the internal surface enhances air velocity through the Venturi effect (reduction in fluid pressure after flowing through a constriction). Both effects contribute to more efficient air flow and allow for a lower power fan than other fan-aspirated radiation shields on the market
Sensor Compatibility
Adapter plugs accommodate multiple sensors, including air temperature sensors like the Apogee ST-110 thermistor and Apogee ST-200 PRT (both with ± 0.1 C accuracy), and air temperature/relative humidity probes like the E + E EE08, Vaisala HMP60, HMP110, and HMP155, Campbell Scientific CS215, Rotronic HC2-S3*, or a combination of temperature sensor and relative humidity probe. For different probes, please contact us to discuss options. Click here to view the Sensor Port Options.
Research Grade Accuracy
Extensive tests with replicate shields over the past three years have shown the TS-100 compares favorably (± 0.02°C) to all the higher-powered industry standard fan-aspirated shields. Using our recommended ST-110 precision thermistor provides a measurement uncertainty of ± 0.1 C.
Aerodynamic Shape
The curved inlet facilitates the reduction of air into the shield through the Coandã effect (tendency of fluid to follow a convex surface). The tapered diameter of the internal surface enhances air velocity through the Venturi effect (reduction in fluid pressure after flowing through a constriction). Both effects contribute to more efficient air flow and allow for a lower power fan than other fan-aspirated radiation shields on the market
Sensor Compatibility
Adapter plugs accommodate multiple sensors, including air temperature sensors like the Apogee ST-110 thermistor and Apogee ST-200 PRT (both with ± 0.1 C accuracy), and air temperature/relative humidity probes like the E + E EE08, Vaisala HMP60, HMP110, and HMP155, Campbell Scientific CS215, Rotronic HC2-S3*, or a combination of temperature sensor and relative humidity probe. For different probes, please contact us to discuss options. Click here to view the Sensor Port Options.