Accuracy, Resolution and range

Excellent Very Good Good N/A or ?

Accuracy: is the ability of a measurement to match the actual value of the quantity being measured.
Resolution: is the number of significant digits (decimal places) to which a value is being reliably measured.
Range: is the amount or extent a value can be measured.

Weather Station Specs Wind Speed
(km/h)		 Wind Direction
(°C)		 Outdoor Temperature
(°C)		 Indoor Temperature
(°C)		 Water Temperature
(°C)		 Outdoor Humidity
(%)		 Indoor Humidity
(%)		 Barometric Pressure
(hPa)		 Rainfall
(mm)		 UV SolarRadiation
(W/m)
Lacrosse Resolution 0.1 22.5 0.1 0.1 N/A 1 1 1 0.5 N/A N/A
3600 Series Range 0 to 180 0 to 360 -40 to 59.9 -9.9 to 59.9 N/A 1 to 99 1 to 99 300 to 1099 0 to 9999 N/A N/A
  Accuracy 2% ? 2 2 N/A 2% 2% 2 2% N/A N/A
Lacrosse Resolution 0.1 22.5 0.1 0.1 N/A 1 1 1 0.5 N/A N/A
7000 Series Range 0 to 200 0 to 360 -30 to 70 0 to 70 N/A 20 to 95 20 to 95 800 to 1100 0 to 3999 N/A N/A
  Accuracy 2% ? 2 2 N/A 4% 4% 2 2% N/A N/A
Lacrosse Resolution 0.1 22.5 0.1 0.1 N/A 1 1 0.1 0.5 N/A N/A
2300 Series Range 0 to 180 0 to 360 -40 to 59.9 -9.9 to 59.9 N/A 1 to 99 1 to 99 300 to 1099 0 to 9999 N/A N/A
  Accuracy 2%   2 2 N/A 2% 2% 2 2% N/A N/A
Lacrosse Resolution 0.1 22.5 0.1 0.1 N/A 1 1 1 0.5 N/A N/A
2500 Series Range 0 to 180 0 to 360 -30 to 70 -30 to 70 N/A 20 to 95 20 to 95 800 to 1100 0 to 3999 N/A N/A
  Accuracy 2% ? 2 2 N/A 4% 4% 2 2% N/A N/A
Davis Vantage Resolution 0.1 22.5 0.1 0.1 1 1 1 1 0.25 0.1 1
Pro II Series Range 0 to 241 0 to 360 -40 to 65 0 - 60 -68 to 60 0 to 100 10 to 90 592 to 1130 0 to 9999 0 to 16 0 to 1800
  Accuracy 2% 7 1 1 1 3% 5% 2 4% 5% 55
Davis Weather Resolution 0.1 22.5 0.1 0.1 N/A 1 1 1 0.5 N/A N/A
Monitor II Series Range 0 to 260 0 to 360 -50 to 65 0 - 60 N/A 0 to 100 10 to 90 592 to 1130 0 to 9999 N/A N/A
  Accuracy 5% 7 1 1 N/A 3% 5% 2 4% N/A N/A
Ultimeter Resolution 1 22.5 1 1 N/A 1 1 1 0.5 N/A N/A
2000 Series Range 0 to 273 0 to 360 -48 to 65 0 to 43 N/A 0 to 100 0 to 100 980 to 1070 none N/A N/A
  Accuracy 2% ? 2 2 N/A 5% 5% 1 ? N/A N/A
Oregon Scientific Resolution 0.1 22.5 0.5 0.5 N/A 1 1 3 1 N/A N/A
WMR-928NX Range 0 to 200 0 to 360 -50 to 70 -40 to 70 N/A 2 to 96 2 to 96 800 to 1100 0 to 3999 N/A N/A
  Accuracy 10% 8 2 to 6 2 to 6 N/A 6 to 7% 6 to 7% 10 5% N/A N/A

 

Wireless Range

All wireless transmission ranges listed in the follow table are line of sight, unless otherwise stated. Buildings, walls, etc can reduce the transmission distance by as much as 50%.

Metal enclosures trailers, aluminum siding, reflective insulation materials, water (rain), reflective window treatments and radio interference (TV, UHF Radio, etc) ca greatly degrade the wireless transmission signal.

Weather Station Transmission Frequency Distance inside Distance Outside With repeater / High Gain Antenna
Lacrosse 3600 Series 433 MHz N/A 100m N/A
Lacrosse 7000 Series 433 MHz 30m 100m 300m (repeater)
Lacrosse 2300 Series 433 MHz N/A 100m N/A
Lacrosse 2500 Series 433 MHz 30m 100m 300m (repeater)
Davis Vantage Pro II Series 915-928 MHz N/A 250m 500m (one repeater) 2500m (eight repeaters)
Oregon Scientific WMR-928NX 433 MHz 30m 100m N/A

 

Update Interval

The weather can change rapidly, particularly wind speed and direction. Rapid weather station update rates are an important factor in capturing data to a Computer.  

Weather Station Wireless Update Intervals
Lacrosse 3600 Series 32-128 seconds / 8 seconds wired
Lacrosse 7000 Series 3 minutes
Lacrosse 2300 Series 32-128 seconds / 8 seconds wired
Lacrosse 2500 Series 3 minutes
Davis Vantage Pro II Series 2.5 seconds
Oregon Scientific WMR-928NX 38 seconds (wind data 16 seconds)

 

Computer Connection and Data Logger

Most professional weather stations have the ability to be connected to a computer so the station data can be downloaded and analyzed and or uploaded to the world wide web.

Some professional weather station may also have a inbuilt Data Logger to store data for a period of time which can then be retrieve via a computer at a later stage.

 

Weather Station PC Connect Connection Type Operating System Data Logger Logger Capacity
Lacrosse 3600 Series Standard Serial MS Windows 98/2000/XP Standard 1750 data sets
Lacrosse 7000 Series Optional Serial MS Windows 98/2000/XP Optional 175 data sets
Lacrosse 2300 Series Standard Serial MS Windows 98/2000/XP Standard 175 data sets
Lacrosse 2500 Series Standard Serial MS Windows 98/2000/XP Standard 175 data sets
Davis Vantage Pro II Series Optional Serial / USB MS Windows 98/2000/XP / Mac OS Optional 2500 data sets
Ultimeter 2000 Series Standard Serial MS Windows 98/2000/XP # #
Oregon Scientific WMR-928NX Standard Serial MS Windows 98/2000/XP # #

# After market Data Loggers are available from 3rd party vendors.