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System last rebooted on Sat 18 Feb 2017 at 15:37.
Atmospheric pressure is measured by a Bosch BMP085 digital sensor. Each sensor is individually calibrated and should be accurate to ± 1 hPa.
The equivalent sea-level pressure is also tabulated (but not plotted); this is derived using Babinet's formula from the height above sea level and the local air temperature. The local height above sea level and the sensor to use for temperature are specified in the UserDB. The defaults are zero and 10° C.
Station height 70 m asl. Air temperature 8.9 °C
Atmospheric pressure over the last 24 hours
Humidity sensors also monitor their local temperature and use this to calculate the dew-point using the "Magnus-Tetens" approximation.
Humidity over the last 24 hours
This section is more technical and is for voltages measured by DS2438 sensors. Vad measures 0 to 10V with a resolution of 10mV, and Vis measures -250 to 250mV with 0.244mV resolution. Vdd is the local supply voltage.The charts plot just Vis in mV. Each DS2438 also measures its temperature, but with limited accuracy (± 2° C).
Vis (mV) over the last 24 hours
System and software © FieldSolutions Glasgow. For more information email 1wire at fsolv dot co dot uk