Weather Station Specifications and Sensor Accuracy

1. VP Weather Station (Wireless)
Collect: Rain, inside temperature, outside temperature, inside humidity, outside humidity, barometric pressure, wind direction, wind speed, windchill, dewpoint, heat stress, moonphase, sunrise, sunset, date and time. As this is a wireless station , there is more flexibility in regards to expansion with other wireless substations such as multiple individual air temperature, soil temperature, water temperature, soil moisture, and leaf wetness sensors (and evapotranspiration).
With Software: Additionally measures heating degree days, cooling degree days, and fuel oil demand.

2. VP Weather Station (Wireless) Plus
Collects the same data as above and also includes UV and solar radiation sensors. As this is a wireless station , there is more flexibility in regards to expansion with other wireless substations such as multiple individual air temperature, soil temperature, water temperature, soil moisture, and leaf wetness sensors (and evapotranspiration).
With Software: Additionally measures heating degree days, cooling degree days, fuel oil demand, sunburn risk for each skin type, and solar energy.

3. VP Weather Station Wired
Collect: Rain, inside temperature, outside temperature, inside humidity, outside humidity, barometric pressure, wind direction, wind speed, windchill, dewpoint, moonphase, sunrise, sunset, date and time. This station requires a wire to be run from the outside station to the console/interface for viewing data.
With Software: Additionally measures heating degree days, cooling degree days, and fuel oil demand.

4. VP Weather Station Wired Plus
Same as item 3, but with UV and also solar radiation sensors.
With Software: Additionally measures heating degree days, cooling degree days, fuel oil demand, sunburn risk for each skin type, and solar energy.

Note: All stations include solar power. Additional solar power can be added if necessary. The station's radiation shield protecting the temperature sensor from solar radiation and other sources of radiated or reflected heat, is available in the passive non-aspirated version or the optional aspirated unit for higher accuracy.

Type	Function	Station	Station	Resolution	Range	Accuracy+-
Agriculture	Evapotranspiration	VP	GW	Rounded to the nearest 0.1 mm from measurement in 0.01" increments	Day to 999.9 mm Month: to 1999.9 mm Year: to 1999.9 mm	5%
	Growing Degree Days	VP-S	GW	Day: 0.1 Degree Day Avg: 0.1 Degree Day Total: 1 Degree Day	Day: to 400 Degree Days Avg: to 400 Degree Days Total: to 19,999 Degree Days	N/A
	Leaf Wetness	VP	GW	1	0-15	0.5
	Soil Moisture	VP	N/A	1 cb	0 to 200 cb	N/A

Barometric Pressure	Barometric Pressure (Elevation range: -1000' to +12500'; -300 m to +3800 m)	VP VP VP	GW -- GW	0.1 mm 0.1 mb 0.1 hPa	660 to 810 mm Hg 880 to 1080 mb 880 to 1080 hPa	0.8 mm Hg 1.0 mb 1.0 hPa
	Three-Hour Trend	VP	--	Slow >=0.5 mm (0.7 mb) Rapid >=1.5 mm (2 mb)	5-Position Arrow	N/A
	One-Hour Trend	--	GW	Change >= 5 mm (0.7 mb, 0.7 hPa)	3-Position Arrow	N/A

Humidity	Inside Humidity	VP	--	1%	10% to 90%	5%
	Outside Humidity	VP	GW	1%	0% to 100%	3%
	Dew Point	VP	GW	1 C	-76 to +54 C	1.5 C

Rainfall	Rainfall	VP	GW	Rounded to the nearest 0.1 mm for measurement in 0.01" increments. At or above 2000 mm, rounded to 1 mm 0.2 mm	Day: 0 to 9999 mm Storm: 0 to 9999 mm Month: 0 to 19999 mm Year 0 to 19999 mm	4%
Rainfall	Rate of Rainfall	VP	GW	Rounded to 0.1 mm	0 to 1999.9 mm/hr	5%

Solar & UV	Solar Radiation	VP	GW	1 W/m2	0 to 1800 W/m2	5%
	Solar Energy	VP-S	GW	PC: 0.1J/cm2	PC: 1999.9 J/cm2	5%
	UV Dose	VP	--	0.1 MEDs	0 to 199 MEDs	5%
	UV Index	VP	--	0.1	0 to 16	5%

Tempurature	Inside Temperature	VP	--	0.1 C	0 to 60 C	0.5 C
	Outside Temperature	VP	GW	0.1 C	-40 to +65 C	0.5 C
	Soil or Water Temperature	VP	GW	1 C	-40 to +65 C	0.5 C
	Outside Temp-Hum Index	VP	GW	1 C	-40 to +57 C	1.5 C
	Temp-Hum-Sun-Wind Index	VP	--	1 C	-68 to +64 C	2 C
	Wind Chill	VP	GW	1 C	-79 to +54 C	1 C

Time /Date	Time	VP	GW	1 minute	24 hours	8 sec/mo
	Date	VP	GW	day/month		8 sec/mo
	Sunrise & Sunset	VP	--	1 minute		N/A

Wind	Wind Direction	VP	GW	1 degree	0 to 360 degrees	7 degrees
	Compass Rose	VP	GW	22.5 degrees	16 compass points	7 degrees
	Wind Speed	VP	GW	0.1 m/s 1 km/hr	1 to 67 m/s 3 to 241 km/hr	5%
	Direction of High Speed	VP	GW	22.5 degrees	16 compass points	7 degrees
	Wind Run		GW	0.1 km	0 to 1999.9 km	5%