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manufacturer of measuring instruments
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COMETEO Professional Multi-Plate Radiation Shield for Weather Sensors

Professional passive solar radiation shield for better protection of weather sensor, datalogger and barometers, naturally ventilated

"Not only radiation shield, but the complete COMETEO system minimizing negative effects"

Multiplate radiation shield is used to protect measuring devices and provides more accurate measurement results. The shield minimizes radiation reaching the sensor, minimizes radiation absorbed by the shield and maximizes ambient air flow around the sensor. The enlarged 200mm diameter of 13 plates is designed to provide full protection of measuring device. Cylindrical space with 110mm diameter and 185mm height is available inside of plates for the installation of measuring device with minimized solar radiation.

Works with COMET instruments - see OPTIONAL ACCESSORIES

  • code
    F8800

Technical data

Measured value

Temperature
Relative humidity
CO2
Atmospheric pressure

GENERAL TECHNICAL DATA

Temperature operating range -30 to +80 °C
Relative humidity operating range 0 to 100 %RH
Storage temperature range -30 to +80 °C
Storage relative humidity range 0 to 100 %RH (no condensation)
Dimension 220 mm (diameter), 250 mm (height)
Weight approx. 900 g
Material ASA - UV stabilized, antistatic
Warranty 3 years

Features

COMETEO is made of ASA plastic which is resistant to mechanical damage and UV radiation. ASA plastic is very stable over time. Transmitter is entirely protected inside the radiation shield by maximized diameter of plates providing advanced weather protection.

 Air Temperature in Meteorology

The measurement of air temperature in meteorology is a difficult task. Accurate air temperature measurements require minimization of local effects (e.g. trees and buildings) and minimization of environmental effects that influence the actual sensing of the temperature at the position of the sensor. World Meteorological Organization - WMO defines internationally  the temperature of the air nearby the earth's surface as “the temperature indicated by a thermometer exposed to the air in a place sheltered from direct solar radiation” (WMO, 1992).

The main functions of thermometer shields are to protect the sensor from direct or indirect radiation from the sun during the day and from radiation from the sensor to the sky at night and to protect the sensor from wetting. Wetting of the sensor and screen is caused by fog, drizzle or rain. But protection against radiation and wetting conflicts with the requirement of sufficient ventilation. Due to insufficient ventilation a microclimate develops within the screen. In fact, all screens develop their own microclimate and the difference with the ambient climate depends on screen type and design.   It may be stated that the larger the bulk of a screen, the stronger the microclimate within the screen and the more the sensed temperature deviates from the real air temperature. From the above, it follows that thermometer screens should have a high reflectivity to minimize heating of the plates and subsequent warming of the air as it flows over the plates to the sensor. To decrease the time the air is in contact with the plate, the plate radial distance should be as small as possible. To prevent the development of microclimates within screens, also the blockage of ambient airflow by the screen should be minimized by making the plate spacing as large as possible, taking into account the requirement that wetting of the sensor should be prevented. Any design of a thermometer screen is a result of compromises. Finding the optimal design is a serious challenge that may require the use of different methods for studying the behavior of screens. In the field, the actual differences between the air temperature in the screens and the ambient air temperature depend mainly on the prevailing weather conditions. Furthermore, the state of the ground and humidity of the soil will also affect the air temperature in the screen as radiation or reflection will cause screen dependent biases. This can easily occur in areas with snow cover and in deserts.

Applications:

Applications - Metrology

Meteorology - COMET sensors together with COMET radiation shields are the ideal basis for weather stations for long-term weather, climate and air monitoring.

Applications - Snow Guns

Snow Guns

Application - HVAC

Building management - Our instruments which measure temperature, humidity, atmospheric pressure and CO2 are an integral part of these industry-leading solutions.

Optional accessories and download

Sensors

WiFi temperature and relative humidity sensor for external probe

WiFi temperature and relative humidity sensor for external probe

code W3711
WiFi temperature sensor for one external Pt1000 probe

WiFi temperature sensor for one external Pt1000 probe

code W0711
Wireless thermometer with built-in sensor, Sigfox IoT

Wireless thermometer with built-in sensor, Sigfox IoT

code W0810
Wireless IoT thermometer for external probe, Sigfox

Wireless IoT thermometer for external probe, Sigfox

code W0811
Wireless thermometer for Sigfox IoT, three-channel

Wireless thermometer for Sigfox IoT, three-channel

code W0832
Wireless thermometer, hygrometer, Sigfox IoT

Wireless thermometer, hygrometer, Sigfox IoT

code W3810
Wireless thermometer, hygrometer barometer, Sigfox IoT

Wireless thermometer, hygrometer barometer, Sigfox IoT

code W7810
Industrial temperature and humidity transmitter - RS232 output

Industrial temperature and humidity transmitter - RS232 output

code T3319
Web sensor - remote thermometer hygrometer with Ethernet interface. Weather sensor for environment monitoring.

Web sensor - remote thermometer hygrometer with Ethernet interface. Weather sensor for environment monitoring.

code T3511
Industrial temperature, humidity, bar. pressure transmitter - RS232 output

Industrial temperature, humidity, bar. pressure transmitter - RS232 output

code T7311
Industrial temperature, humidity, bar. pressure transmitter - RS485 output

Industrial temperature, humidity, bar. pressure transmitter - RS485 output

code T7411
Web Sensor - remote thermometer hygrometer barometer with Ethernet interface

Web Sensor - remote thermometer hygrometer barometer with Ethernet interface

code T7511
Temperature and humidity duct probe with 0-10V output

Temperature and humidity duct probe with 0-10V output

code T0213D
Temperature and humidity duct probe with 4-20mA output

Temperature and humidity duct probe with 4-20mA output

code T3113D
Duct mount temperature probe 0 to +150°C / 4 to 20mA, IP65

Duct mount temperature probe 0 to +150°C / 4 to 20mA, IP65

code P0132
Temperature and humidity duct mount transmitter with RS485 output

Temperature and humidity duct mount transmitter with RS485 output

code T3413D
Web Sensor with PoE, duct mount - remote thermometer hygrometer barometer with Ethernet interface

Web Sensor with PoE, duct mount - remote thermometer hygrometer barometer with Ethernet interface

code T7613D
Temperature and humidity regulator

Temperature and humidity regulator

code H3021
Temperature and humidity regulator with 230Vac/8A relays

Temperature and humidity regulator with 230Vac/8A relays

code H3061
Thermometer hygrometer with Ethernet interface and relays

Thermometer hygrometer with Ethernet interface and relays

code H3531
Thermometer hygrometer barometer with Ethernet interface and relays

Thermometer hygrometer barometer with Ethernet interface and relays

code H7531
Temperature and humidity regulator with RS232 output

Temperature and humidity regulator with RS232 output

code H3331
Temperature and humidity regulator with RS485 output

Temperature and humidity regulator with RS485 output

code H3431

Dataloggers

IoT Wireless Temperature Datalogger for 4 external probes, with built-in GSM modem

IoT Wireless Temperature Datalogger for 4 external probes, with built-in GSM modem

code U0141M
IoT Wireless Temperature Datalogger for 2 external probes, with two two-stat inputs, built-in GSM modem

IoT Wireless Temperature Datalogger for 2 external probes, with two two-stat inputs, built-in GSM modem

code U0843M
IoT Wireless Temperature and Relative Humidity Datalogger for external probe, with built-in GSM modem

IoT Wireless Temperature and Relative Humidity Datalogger for external probe, with built-in GSM modem

code U3121M
Temperature and humidity data logger for external probe

Temperature and humidity data logger for external probe

code U3121
Temperature data logger for one external Pt1000 probe

Temperature data logger for one external Pt1000 probe

code U0111

Temperature probes

Temperature probe for COMEO Solar Shields F8x00, Pt1000TR160/0, without connector, cable 25 cm

Temperature probe for COMEO Solar Shields F8x00, Pt1000TR160/0, without connector, cable 25 cm

Temperature range: -30 to 80°C
code SN250V

Manuals

download-icon Instruction Manual
972.23 KB

Related products

WiFi temperature and relative humidity sensor for external probe

WiFi temperature and relative humidity sensor for external probe

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WiFi temperature sensor for one external Pt1000 probe

WiFi temperature sensor for one external Pt1000 probe

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Wireless thermometer with built-in sensor, Sigfox IoT

Wireless thermometer with built-in sensor, Sigfox IoT

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Wireless IoT thermometer for external probe, Sigfox

Wireless IoT thermometer for external probe, Sigfox

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Wireless thermometer for Sigfox IoT, three-channel

Wireless thermometer for Sigfox IoT, three-channel

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Wireless thermometer, hygrometer barometer, Sigfox IoT

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Temperature and humidity duct probe with 4-20mA output

Temperature and humidity duct probe with 4-20mA output

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Temperature and humidity duct probe with 0-10V output

Temperature and humidity duct probe with 0-10V output

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Temperature and humidity duct mount transmitter with RS485 output

Temperature and humidity duct mount transmitter with RS485 output

code T3413D
Web Sensor with PoE, duct mount - remote thermometer hygrometer barometer with Ethernet interface

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Duct mount temperature probe -30 to +80°C / 4 to 20mA, IP65

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code P0122
Duct mount temperature transmitter with 0-10V output, stem length 120mm

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