Waterproof thermometers are easily calibrated by placing them in a glass of ice water. These can be used for instantaneous measurement of temperature on the exposed surfaces of objects. Point and scan building walls to find insulation leaks, survey animal containment and produce storage facilities to identify hot or cold spots, spot check machinery and equipment motors for overheating. These can also be used to check turf or other plant canopy temperatures to determine the need for evaporative cooling to prevent wilting and fruit burn or drop. These thermometers record the most recent minimum and maximum air temperatures, as well as displaying the current air temperature.
Different models are available, including waterproof recorders for soil or water temperatures.
One way is to always make sure you spray during safe wind speeds. Readings from an anemometer should always be noted on your pesticide application record, both when you start and stop spraying. Hand-held anemometers can measure instantaneous, current wind speeds. A spray rig driver or spotter for an aerial applicator can use a hand-held anemometer to indicate when spraying should stop due to high wind speeds. Spraying when the wind is too strong invites risks from both drift and poor coverage of the plants you're trying to protect.