Aspirated Radiation Shield
Accurate measurement of air temperature

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
Sensor port adapter plugs accommodate multiple sensors, including air temperature sensor (recommended probes are Apogee model ST-110 (included in the TS-110), thermistor with ± 0.1 C accuracy, and Apogee model ST-200 PRT with ± 0.1 C accuracy), air temperature/relative humidity probes recommended probes are E + E model EE08, Vaisala models HMP60, HMP110, and HMP155, Campbell Scientific model CS215, Rotronic model HC2-S3*, or the combination of dedicated air temperature sensor and air temperature relative humidity probe. For maximum accuracy we recommend redundant measurements of air temperature. If you use a different probe, please contact us to discuss potential cross-compatibility or our custom port adapter options. Click here to view the Sensor Port Options.
*If the Rotronic HC2-S3 probe is used with the E3 Active Set module, it must be water-proofed before use with the Apogee TS-100 radiation shield. The E3 Active Set module is not water proof (water can infiltrate at the point where the cable enters the housing). A small length of water-proof heat shrink (ATUM heat shrink) can be used to seal the gasket where the cable enters the housing for the E3 Active Set.

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.

Typical Applications
Applications include air temperature and humidity measurement in weather networks, often for weather forecasting, and solar energy sites. Fan-aspirated shields are also important in the precise measurement of air temperature and humidity gradients above the land surface and in climate change monitoring.

Purchasing Options
There are two models to choose from when purchasing the shield. The TS-100 is a shield only model. The TS-110 comes with a discounted, pre-installed ST-110 precision thermistor that provides ± 0.1 C uncertainty right out of the box.

Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.

Tasmania: Ecological Research
Eight TS-100 shields used to provide air temperature measurements to monitor long-term ecological health dynamics within wet eucalyptus forest at the Warra long-term ecological research site (LTER).
Read More >

TS-100 at Peter Sinks
TS-100 used on a weather station at a record-setting cold location-Peter Sinks, Utah.
Read More >

TS-100 at Utah State University
The USU weather station uses both an aspirated and static shield to monitor air temperature. A real-time graph on the site shows errors that occur when using static shields.
Read More >