On 2013-05-10, Christian Weisgerber <na...@mips.inka.de> wrote: > Stuart Henderson <s...@spacehopper.org> wrote: > >> TemperNTC (http://www.pcsensor.com/index.php?_a=product&product_id=7) >> uses uthum(4) but has a problem where the sensor drops out occasionally; >> diff I posted to tech@ improves (but doesn't totally fix) this. >> This seems specific to TemperNTC, I don't have any other uthum(4) >> devices myself but it seems e.g. TemperHUM is more reliable. > > My TEMPerHUM also drops out occasionally. > > As far as the readings are concerned, the temperature it reports > is consistently some 1.5 .. 2.0 degC higher than what an alcohol > thermometer in the same room shows, i.e., the measurements are > reproducible if somewhat miscalibrated. I doubt that the humidity > readings are any good, but I haven't checked. >
I've just got a ugold to play with locally (rather than my other one which is in a remote server room), all three of these are in pretty much the same location next to my laptop: hw.sensors.ugold1.temp0=22.75 degC (inner) hw.sensors.uthum1.temp0=19.00 degC (inner) hw.sensors.uthum1.temp1=22.99 degC (outer/ntc) I don't have an alcohol/Hg thermometer to compare with though. Maybe I'll try the NTC in a cup of iced water to see how that looks (the ugold and uthum's inner sensors are somewhat harder to check in that way :)
