Tech Note 014 - Accurate (Precision) Sensor Comparison
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- Опубліковано 5 лис 2016
- The aim of this video is to show how you can get an accurate temperature and humidity reading from a sensor if you choose the correct type. The SHT31 and HDC1010 are compared and the results are near identical. The Sensiron sensor SHT31 is backed up by a calibration certificate providing confidence that the results are within known bounds validated partially by the tests in this video. You can buy the sensors from here:
Buy them here: www.tindie.com/products/close...
Or here:
stores.ebay.co.uk/ClosedCube?_...\
On-balance I'd recommend the SHT31 sensor as the best all-rounder. - Наука та технологія
You may note I keep saying DHT31 when I mean 'SHT31" - I don't know why I keep doing that :)
Have you come across the HYT series from IST, the price is way too scary but the specs are very nice.
The handling requirements for the HYT-271 suggest that it's extremely fragile.
HYT-271
www.ist-usadivision.com/objects/media/data-sheets/product/humidity-module/HYT-271.pdf
HYT-221
www.farnell.com/datasheets/1643979.pdf
HYT-939
www.ist-usadivision.com/objects/media/data-sheets/product/humidity-module/HYT-939.pdf
Not yet, I see what you mean about price! Accuracy of 0.2°C and 1.8%RH is very good and very near the affordable HDC1010 spec, all these sensors seem to be as good as it gets for now.
While my current applications don't require such a high spec, I think I'll get a HDC1010 to keep on hand. It's interesting that the sensor is on the bottom of the chip, I suspect the close environment under there might change slower than the surrounding air, perhaps why your reading converged quicker once you placed a cap over the top.
Without the cap the readings were constantly fluctuating, it was more of a trial and error test that worked out OK, once the cap was on the air currents were reduced and then the sensors stabilised. yes, the HDC1010 is one of the most accurate sensors you can get and is worthwhile holding as a reference. Now I have compared it with the more popular DHT22 I can see the popular choice is not that good, whilst not essential to have the ultimate in accuracy it is good to at least have readings that can be trusted. You may find it difficult to find a supplier, ClosedCube in the UK was the only one I could find.
When are you going to test the SHT35 Sensor? I´s the most accurate of the world!
See my Tech Note 066 !
Kapitan Kir I also used the Sensiron permeable filter
See Tech Note 066
Thanks!!
@@G6EJD huh, you didnt test it though?