Page 23 - Demo

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WEATHER, CLIMATE & NATURAL RESOURCES,
Solar-Powered Weather Station
Say goodbye to electricity and power cords—this weather station and its sensors are powered by solar energy! Measure wind speed, wind direction, temperature, baro- metric pressure, rainfall and relative humidity. It computes wind chill and dewpoint, shows wind direction variations and stores maxi- mum and minimum data readings. The digital display panel has a 12-position selec- tor knob. Set the display panel to autoselect and continuously scan in sequence each weather category every 4 seconds.
AP4878 I $1,340.95
Sling Psychrometers
Easy-to-use, inexpensive sling psychrometer. Quickly determine dew point and relative humidity with the wet-bulb/dry-bulb tech- nique. One kit includes two thermometers mounted on stiff vinyl backing, wet-bulb sleeve, sling handle and mounting screw. Reproducible instruction sheet provides concept explanations, psychrometer chart and sample calculations. Sold individually and as a classrom set!
FB1582 I Classroom Set I $99.95
Barometer, Metric
Non-mercurial, dial-type barometer with a dual-range scale. Range is 940 to 1070 milli- bars or 710 to 800 mm of mercury with an accuracy of ±3 to 4 millibars. Instrument can be wall mounted. 4" dial is easy to read from a distance.
AP5070 I $34.70
continued
FB0543 I Individual Kit
I $9.70
Weather Model
Anemometer, Working Model
Demonstrate the principles of wind velocity measurement. Consists of four cups (5-cm diameter) mounted on a low-friction axle securely affixed to a molded plastic base for stability. The super-smooth, cone-bear- ing hub allows the anemometer to rotate
in breezes as gentle as two miles per hour. One cup is painted a high-contrast color to facilitate the counting of rotations. Complete with instructions for classroom demonstration.
FB0508 I $21.70
I WEATHER, CLIMATE & NATURAL RESOURCES 21
This unique 3-D model demonstrates basic air mass structures and explains the relation- ships between cloud types, precipitation, temperature, air pressure and warm and cold fronts. Students make numerous weather forecasts based on data provided. The clear plastic tray model is imprinted with a variety of colors to show different weather patterns on a map. Vertically placed cloud types and upper air conditions give the model a 3-D appearance. 16" × 12" × 3".
AP5128 I $111.00
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