Meteorological Balloons

Today, atmospheric information is most often gathered by height-finding radar, remote sensing by earth-orbiting or stationary satellites, and aircraft instruments, with weather balloons augmenting the data. Meteorological balloons are used in the measurement and evaluation of mostly upper atmospheric conditions. Information may be gathered during the vertical ascent of the balloon through the atmosphere or during its motions once it has reached a predetermined maximum altitude.

Felix supplies meteorological balloon, weather balloon, sounding balloon from 10g to 2000g. These balloons are produced by rotational molding of natural rubber. Their uniform wall thickness prevent premature blowouts, and they are ozone resistant. Reinforced necks allow use in strong winds without tearing.

We provide two types, ceiling meteorological and sounding balloons:

Ceiling type Meteorological Balloons are usually used for applications such as determination of cloud base height. Ceiling type meteorological balloons are available in red, black and white colour. The ascent of these weather balloons is tracked using optical instruments.

Sounding type meteorological balloons are used to carry larger payloads, typically in the form of a radiosonde. A radiosonde includes which include sensors for air temperature, pressure, humidity etc. Depending on the size of the balloon it will fly to a certain height with the radiosonde payload. These sensors in the radiosonde communicate with ground receiving stations, constantly sending data streams with recorded informaiton. This information is then used by meteorologists for weather predicition.

Felix Meteorological Balloon 1      Felix Meteorological Balloon 2  

 

  

 

 Other Meteorological Instruments:

Felix SMART2000 Telemetry System

The SMART2000 Telemetry System is a Hi-Tec acquisition, logging, and control system based on ARM microprocessor. Due to its design architecture, it can serve all the environmental applications including meteorology, hydrology, and water and air quality. The Felix Technology RTU has 8 isolated differential analogue inputs, enabling data acquisition with a high resolution up to 16 bits. It features 6 digital inputs/outputs, all protected allowing the user to control various sensors and auxiliary equipment.

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 Felix Snow Depth-Sensor The SL300 ultrasonic snow depth sensor provides a total system in a compact package, containing an ultra sensitive electrostatic transducer and the supporting circuitry to provide a 0 to +5 or 0 to +2.5 VDC output with fully independent zero and span adjustments over the entire operating range of detection from 1.5’ - 20’.
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  Precipitation gauge is a high-grade gauge with a collecting area of 500 cm². It also has advanced heating system for operation at extreme areas.
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  The Pressure Sensor FT5004 series are barotransmitters with piezoresitive sensing elements and analog outputs. The features are the compact design, low weight and low power consumption. FT 5004 sensors are available with both voltage or current outputs.
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  The Pressure sensors FT5005 series are used to determine the absolute atmospheric pressure. The optional output analog signal can be used for meteorological purposes or as input signal for control and regulation applications. With a piezoresistive pressure sensor and signal conditioning electronic the actual air pressure will be transformed into a proportional standardised electrical output and is displayed with a resolution of 0.1 hPa. Main features are; switchboard housing, low weight and low power consumption.
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Felix Pyranometer  The pyranometer is an instrument for measuring the solar irradiance. The thermopile sensor construction measures the solar energy that is received from the total solar spectrum and the whole hemisphere (180 degrees field of view). The output is expressed in Watts per meter square. The pyranometer is designed for continuous indoor and outdoor use.
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Felix Visibility Sensor  Visibility sensor is configured for accurate measurement of visibility in the densest of fogs to very clear air conditions and is the refinement of 2 decades of experience and technology resulting in a compact, robust instrument with excellent performance.
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Felix Aspiration Psychrometer  The Aspirator Psychrometer FT3060 series are used for measuring the air temperature and the humidity. Two parallel mounted, equal mercury thermometers are used. The bulb of one thermometer (wet bulb thermometer) is covered by a wick, which must be moistened for a measurement. The bulb of the other thermometer remains without wick. Both bulbs are encased by two radiation tubes. In order to achieve an effective radiation shield the surface of the instrument is polished.
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  Humidity/Temperature FT3030 series Sensors are used for the measurement of the relative humidity and the air temperature simultaneously. A capacitive measuring element is used for the measurement of the relative humidity and a PT100 is used for the measurement of the air temperature. Both sensors are located in a measuring probe, protected by a membrane filter. The measuring probe is placed inside a solar radiation shield made of a defined white colored plastic. There is also an electrically ventilated version available for measurement of the exact temperature when wind or drift are absent.
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 Felix Electrically Aspirated Thermometer Electrically Aspirated Psychrometer FT3010 series provide continuous measurements of the "dry bulb" and "wet bulb" temperatures with high accuracy. From these two values the desired relative humidity and dew point temperature may be obtained by using psychrometric tables, diagrams or a computer system. The design of the instrument essentially eliminates the effects of wind and radiation. Inside the downward inclined radiation shield tubes, two platinum resistance thermometers (Pt100W) are mounted.
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 Felix August Psychrometer The August Psychrometer FT 3070 is designed to measure the temperature and the temperature extremes, and to determine real humidity. The instrument consists of spring driven aspirator to ventilate thermometers, stand, thermometer supports, psychrometer thermometers, and maximum & minimum thermometers.
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Felix Anemometer 1  The wind speed sensor FT4000 series are used for transmission of electrically measured wind speed. This wind sensor is designed for automatic weather stations which can be used in a wide range of locations such as airports, research vessels, and industrial sites. The availability of simultaneous outputs makes the wind sensor suitable for a wide range of applications. It consist of a low inertia 3-cup assembly as sensing element, a shaft made of stainless steel guided in special covered precision ball bearings, and a housing made of polycarbonate.

The sensor is also available with analog outputs providing voltage or current proportional to the wind speed (FT4034.10). This makes the sensor suitable for up to 4 analog instruments, connected in line.

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  High Precision Pressure Sensor FT5002 uses a capacitive ceramic sensing element to measure barometric pressure . FT5000 has a very fast response with excellent repeatability and long term stability. This pressure sensor is compact, light and also with low power consumption. A 4-wire connection used to connect the sensor to a data acquisition system with an analog voltage output.
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 Felix Air Temperature Sensor in Radiation Shield Temperature sensor FT2030 series are equipped with platinum resistance thermometers Pt100, DIN 60751 B, tolerance class1/3 DIN, with 4-wire connection and 5m cable. The sensor is placed in plastic shaft and screwed into the base plate by means of a cable duct. The base plate is for senor mounting using two M8-screws, 30 mm apart. The radiation shield is designed to minimize the influence of short-wave radiation and long-wave radiative exchange. Radiation shield consists of 12 plates made of a special white plastic material. Its aerodynamically optimized design features efficient horizontal air flow.
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Felix Sunshine Duration Sensor  Sunshine duration is defined by WMO as the time during which the direct solar radiation exceeds the level of 120 W/m². It has no moving parts and uses 3 photo-diodes with specially designed diffusers to make an analogue calculation of when it is sunny. The output is switched high or low to indicate sunny or not sunny conditions. The calculated direct irradiance value is also available. The sensor has built-in heaters to dissipate rain, snow and frost. These are normally switched externally but an optional internal thermostat control is available.
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  A fact is that evaporation rate is extremely sensitive. The Pan is manufactured from painted GI sheet tested for water leak. The stilling well and thermometer clamps are manufactured from Brass. This is supported on wooden platform and covered with reinforced chickon, Measuring Jar is manufactured from transparent Acrylic also available is bran. This Pan Evaporimeter is also available in galvanized Iron as per customer's requirement.
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