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Note: Items from this manufacturer normally ship within 3 days. However from time to time backorders occur; if this happens we will let you know as promptly as possible.
Delta T is the spread between the wet bulb temperature and the dry bulb temperature, and it offers a quick guide to determining acceptable spraying conditions. When you know Delta T, you ensure that every drop of spray counts.
This Delta T agricultural calculation is unique to 3500 DT model, as it was designed with the farming community in mind. For more information on Wet Bulb Temperature and Dry Bulb Temperature, check HERE
The only features available on the Kestrel 3500 Wind Meter that are not available on the 3500 Delta T are wind chill and heat stress index.
To Note: The Kestrel 3500 Delta T does not log accumulated data like the more high-tech weather meters of the Kestrel 4000 series.
The Kestrel 3500 Delta T's easy to use menu system scrolls through each of its environmental measurement conditions. It has an external temperature sensor with a waterproof casing that allows you to gauge the temperature of water, snow, and the open air. The sensitive and user-replaceable impeller technology provides accurate wind speed info, and a hard slide-on case, lanyard, and battery are included.
This unit has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.
It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a short burst of white, yellow, green or blue light ﾓbleaches outﾔ the rod cell photoreceptors in the eye and causes night blindness until the entire adaptation process can take place again. Light in the red spectrum does not cause this ﾓbleaching outﾔ, preventing night blindness and night vision fatigue.
* Current Wind Speed
* Maximum Wind Gust
* Average Wind Speed
* Air, Water & Snow Temperature
* Wind Chill
* Relative Humidity
* Heat Stress Index
* Barometric Pressure
* Wet Bulb Temperature