Measure multiple environmental parameters with a single self-contained pen-style anemometer. Ideal for field studies and HVAC. Measures wind speed in four units of measure, temperature in ºC & º...

Large, clear dual-scale barometer in hPa (hecto Pascal) and mm (millimeter mercury) on a 4" dial which is easy to read from a distance. For classroom, lab, or industrial use. Accuracy of ±3 to 4 hPa....

Torricelli (1608 – 1647) proved that air pressure was subject to variations and in 1643 he devised the first barometer. Goethe, the famous German playwright, who enjoyed scientific experiments, late...