I bought a Lacrosse Technology wireless weather station about a month ago because I like to know the outside temperature before I go out. The model I ordered through Amazon.com also has a humidity readout, which I'm told will be an interesting detail once summer comes to Arkansas.
I followed the instructions and mounted the sensor inside our screened back porch in a spot where it would be in shade, yet exposed to the ambient air currents.
The temperature readings seem to be accurate, but the humidity readings are consistently lower than they should be.
I sent an email to the Lacrosse Technology tech support people last week that said:
I'm getting suspiciously low humidity readings on my WS-7212U. The local NWS radio station reported the humidity at 92% this morning when my unit read 71%.
During the torrential downpours we had this week in northern Arkansas, the highest humidity reading I got was 77%.
The sensor is mounted inside a screened porch where it has lots of exposure to ambient temperature and humidity.
Is there any way to adjust either the sensor or receiving units (BTW, they both show the same humidity levels.)?
This week, I got this emailed response:
Keep in mind humidity can vary from area to area, and also where you have your sensor in regards to what your comparing to, different heights (or elevations) can have very different humidity readings.
The Resolution in the manual is the smallest unit a device can measure/display. On our products the Resolution for Humidity is 1%. This means the Humidity will always be read in whole numbers. If the humidity rises .7%, the station will measure 1% change.
The Range is how high or low the sensor will read. Some are 20%-95%, some are 1%-99%. Within that range, the Resolution is still 1% increments.
Accuracy is the capability of a measuring device to provide a correct reading. Tolerance is simply a way of expressing the range of that accuracy.
All La Crosse Technology Products have a Humidity Accuracy of +/- 7%. So in a side be side comparison of our indoor and outdoor units, up to 14% difference is considered within Tolerance. (indoor read 7% low outdoor reads 7% high). All electronic devices have similar tolerances.
Best Regards,
Megan
La Crosse Technology - Customer Support
A 14% margin of error? Sorta makes the whole exercise pointless, doesn't it?
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