The Kestrel 3500 is designed for those of you who need all the environmental data - BUT - you don't need to log it.

Irrigation and construction professionals use the Kestrel 3500
Military personnel use the Kestrel 3500NV
Available in the NV Configuration
Measures
Barometric pressure
Pressure trend
Altitude
Relative humidity
Heat stress index
Dewpoint
Wet bulb temperature
Wind chill
Air, water, and snow temperature
Current & Average wind speed
Average wind speed
Maximum wind gust
Real-time clock
Waterproof  - Floats
Large easy-to-read display with backlight
Data hold function
High precision pressure sensor
Quick response - external thermistor
Forecast weather with pressure trend indicator
Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit
Patented user-replaceable impeller
Reliable - Portable - Easy to use
Protective cover with sure-grip overmolding
All instruments and accessories are completely assembled in the USA
5-year warranty
A slip-on protective cover
Neck lanyard
CR2032 coin cell battery (Average life 300 hours)
Kestrel Certificate of Conformity
Size 4.*" x 1.7" x .7"
Weighs   2.3 ounces

Also comes with Dewpoint Temp - 0835DT and the Night Vision feature 0835NV