Apogee Instruments aspirated radiation shields provide accurate measurement of air temperature with minimal power draw. — Accurate measurement of air temperature

Apogee Instruments’ fan-aspirated radiation shield works with several temperature and humidity sensors to provide 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

Various humidity and temperature sensors work with the shield through the use of adapter plugs. Standard adapter plugs are available for the Apogee ST-110 thermistor, Apogee ST-300 PRT, and the EE08-SS air temperature/relative humidity probe. Upon request, custom plugs are also available for sensors such as the Vaisala HMP110, Campbell Scientific CS215, Rotronic HC2-S3, or a combination of temperature sensor and relative humidity probe. Please contact us to discuss options, and click here to view a guideline for custom adapter plug constraints.

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.

High Quality Cable

Aspirated Radiation Shields feature an IP68, marine-grade stainless-steel cable connector located on the fan (optional for temperature sensors) to simplify sensor removal for maintenance and recalibration. Cable is shielded, twisted-pair wire with a TPR jacket for high water resistance, UV stability, and flexibility in cold conditions.

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.

Specs Table
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Case Studies
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TS-100 aspirated radiation shield entirely covered in ice but still working perfectly. — Accurate measurement of air temperature

Apogee Instruments’ fan-aspirated radiation shield works with several temperature and humidity sensors to provide 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

Various humidity and temperature sensors work with the shield through the use of adapter plugs. Standard adapter plugs are available for the Apogee ST-110 thermistor, Apogee ST-300 PRT, and the EE08-SS air temperature/relative humidity probe. Upon request, custom plugs are also available for sensors such as the Vaisala HMP110, Campbell Scientific CS215, Rotronic HC2-S3, or a combination of temperature sensor and relative humidity probe. Please contact us to discuss options, and click here to view a guideline for custom adapter plug constraints.

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.

High Quality Cable

Aspirated Radiation Shields feature an IP68, marine-grade stainless-steel cable connector located on the fan (optional for temperature sensors) to simplify sensor removal for maintenance and recalibration. Cable is shielded, twisted-pair wire with a TPR jacket for high water resistance, UV stability, and flexibility in cold conditions.

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.

Specs Table
Learn More

Videos
Learn More

Case Studies
Learn More

Support Info
Learn More

TS-100-SS Aspirated Radiation Shield (shield only)

$395.00

TS-110-SS Aspirated Radiation Shield (thermistor included)

$445.00

TS-120-SS Shield/EE08 Package

$790.00

TS-130-SS Shield/EE08 Probe/Thermistor Package

$840.00

AT-001-SS Replacement Fan for Aspirated Shield

$53.00

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