Kestrel 4000 Weather Meter

Features: Barometric Pressure & Trend Altitude & Density Altitude Relative Humidity & Dew Point Wind Chill & Heat Stress Index Wet Bulb Temperature Air, Water, & Snow Temperature Current & Average Wind Speed Maximum Wind Gust One-button clear and restart of Max Wind Gust and Average Wind measurement Waterproof & Floats Manual data capture Automatic Data Storage Customizable Data Storage - 2000-point data logger with graphical display for each measurement variable Auto data storage interval settable from 2 seconds to 12 hours Minimum, maximum, average and logged history stored and displayed for every measured value Data Upload with optional PC interface and provided software Optional RS-232 connection with USB adapter available Aviation green electroluminescent backlight ( Kestrel 4000) Night-vision preserving electroluminescent backlight ( Kestrel 4000 NV) . Backlight incorporates optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Please note: This backlight appears soft greyish pink, not " red, " and is still in the visible spectrum, so is not compatible with night-vision equipment. Choice of automatic or manual backlight activation Real-time hours: minutes: seconds clock, calendar, automatic leap-year adjustment User-selectable auto shutdown: 15 or 60 minutes with no keypresses or disabled Five Languages: English, French, Spanish, German, and Italian User-replaceable Impeller Flip-top Impeller Cover Soft Carry Case Wrist and Neck Lanyards Five-year warranty from the manufacturer SPECIFICATIONS Wind Speed ( sample every 1 second) 0.4 to 40 m/ s ( 0.1 resolution, 3% accuracy) 59 to 7, 877 ft/ min ( 1 resolution, 3% accuracy) 1.0 to 144 km/ h ( 0.1 resolution, 3% accuracy) 0.8 to 89 mph ( 1 resolution, 3% accuracy) 0.6 to 78 kt ( 0.1 resolution, 3% accuracy) 0 to 12 Beaufort ( 0.1 resolution, 3% accuracy) Temperature ( sample every 1 second) -20.0 to 158.0 ° F ( 0.1 res, 1.8 ° F accuracy) -29.0 to 70.0 ° C ( 0.1 res, 1.0 ° C accuracy) Relative Humidity ( sample every 1 minute) 0.0 to 100.0 % ( 0.1 res, 3.0 % RH accuracy) Barometric Pressure ( sample every 1 second) 8.86 to 32.48 inHg ( 0.01 resolution, 0.05 inHg accuracy) 300 to 1100 hPa / mb ( 0.1 resolution, 1.5 hPa / mb accuracy) PSI ( 0.1 resolution) Altitude ( sample every 1 second) -6000 to 30000 ft ( 1 res, 50 ft accuracy) -2000 to 9000 m ( 1 res, 15 m accuracy) Wind Chill ( sample every 1 second) -49.0 to 257.0 ° F ( 0.1 res, 1.8 ° F accuracy) -45.0 to 125.0 ° C ( 0.1 res, 1.0 ° C accuracy) Heat Index ( sample every 1 minute) 0.0 to 100.0 % RH, -49.0 to 257.0 ° F ( 0.1 resolution, 3.6 ° F accuracy) -0.0 to 100.0 % RH, -45.0 to 125.0 ° C ( 0.1 resolution, 2.0 ° C accuracy) Dew Point ( sample every 1 minute) 0.0 to 100.0 % RH, -49.0 to 257.0 ° F ( 0.1 resolution, 3.6 ° F accuracy) 0.0 to 100.0 % RH, -45.0 to 125.0 ° C ( 0.1 resolution, 2.0 ° C accuracy) Wet Bulb ( sample every 1 minute) -49.0 to 257.0 ° F, 0.0 to 100.0 % RH, 8.86 to 32.48 inHg ( 0.1 resolution, 3.6 ° F accuracy) -45.0 to 125.0 ° C, 0.0 to 100.0 % RH, 300.0 to 1100.0 hPa ( 0.1 resolution, 2.0 ° C accuracy) Density Altitude ( sample every 1 second) FT: -49.0 to 257.0 ° F, 0.0 to 100.0 % RH, 8.86 to 32.48 inHg ( 1 res, 246 accuracy) M: -45.0 to 125.0 ° C, 0.0 to 100.0 % RH, 300.0 to 1100.0 hPa ( 1 res, 75 accuracy) Power requirements: 2 AAA Alkaline batteries ( included) Battery life: ± 400 hours, depending on backlight use Dimensions: 5.0" x 1.8" x 1.1" ( 12.7cm x 4.5cm x 2.8cm)