What really struck me as remarkable was this bit: "Digital display with back light gives exact and clearly reading although you stay at the somber conditions"
Lips or tongue are even more sensitive for this IME. I test vitrification of pottery by putting my tongue on it. I use my lips to test washing for cold vs. damp, but we sparsely use an eco friendly washing liquid, YMMV.
I live in a tiny flat in Austria. The vast majority of my washing dries overnight provided I actually get it done around lunch time... even when it's raining. I don't even put it outside most of the time.
If I'm in a major hurry, mostly due to self inflicted procrastination, I'll point a regular fan at the rack as it dries.
I used to hang my clothes indoors when I was living in Europe (some apartments had clever retractable hangers built above the bathtub), and even when raining they would dry in less than a day.
Every apartment complex I've lived in has had rules banning hanging clothes (no idea about enforcement). Also, for any group larger than 2 I imagine the clothes would not dry fast enough to keep up.
And most bathrooms are small and often without a window.
Not a complaint, just pointing out that sun-drying is often not a real choice. Often it is.
Many management types will attempt to tell you that you can't hang clothes on a line. In nineteen states, such rules are explicitly prohibited by state law: http://www.sightline.org/2012/02/21/clothesline-bans-void-in... . They have the cheeky name of "right to dry states".
A related thing often banned is external over-the-air antennas, protected by US federal law.
Well, the focus in that particular article is on HOA bans, not apartment ones. For instance, the Hawaii law (the first one I clicked on that seemed particularly cut-and-dried) is restricted to single-family homes and townhomes.
"The purpose of this Act is to prohibit real estate contracts, agreements, and rules from precluding or rendering ineffective the use of clotheslines on the premises of [b]single-family dwellings or townhouses[/b]."
[0] http://www.capitol.hawaii.gov/session2009/bills/SB1338_CD1_....
Living in Beijing, we never dried our clothes outside the apartment. We had racks in the kitchen for that. I don't think management companies can ban drying inside! It sounds unenforceable.
I'm not sure how common that is, the only place I have heard of it is in some Scandinavian countries but if you know otherwise i would love to hear about it.