For the sake of the experiment ordered Ali a couple of hygrometers for $ 1 apiece. Device shows humidity and temperature.
One of the two hygrometers, alas, turned out to be a dead - always shows 72% humidity and 24.7 ° (for it the seller immediately returned silently the full cost, as soon as I opened the debate), and the other works perfectly and surprisingly shows a fairly accurate results.
I compare the readings with hygrometer instrument readings AZ Instruments 7798 CO2 datalogger ( http://ammo1.livejournal.com/500385.html), having sufficiently accurate moisture meter. The discrepancy at a low total moisture content 5.5% (tool displays detailed 25.5% cheaper - 20%), at high humidity, too, all good. Of course the high accuracy of the instrument for 60 rubles is not intended, but in order to understand what you need to include a moisturizer, it is quite good.
The discrepancy in temperature of 0.6 °. For the device for the price a great result.
Behind the device looks like. It is designed for you to embed it in any panel.
Powered by two batteries AG13 (LR44). The kit they are not.
I bought them here. Who I ordered a couple and see how the testimony will be different for all three priborchik. Now they have risen in price to $ 1.12, but 70 rubles for a hygrometer is also very cheap.
© 2017 Alex Nadozhin
The main theme of my blog - Equipment for human life. I write reviews, share experiences, talk about all sorts of interesting things. And I'm doing stories of the interesting places and tell about interesting events.
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