(24-04-2015, 16:28)AllyCat Wrote: Hmm, that picture (in #1) doesn't look much like a "genuine" calibrated Sensiron humidity sensor, but I guess it's a lot cheaper.
It seems to have a genuine sensor, not sure about the calibration tough.
Still I also own a definitely genuine SHT75 which actually has more accurate spec.s. I am reserving it to my second two meters from the ground "as temp. should be measured" unit.
The problem with the SHT75 is the 1,27 mm pitch which makes it difficult to find a suitable connector.
Quote:The FO anemometer uses only a "mechanical" magnetic reed switch and the vane resistance varies from 660 ohms up to 120 kohms, so a few tens of ohms (of the cable) is unlikely to affect the measurements, provided that a suitable low-pass filter is included (perhaps just a capacitor across the input) to remove any "garbage".
Thanks for the tip. I ended up using just a 3 meters extension. Did some tweaking on the variable resistor and it seems to be working.