How alike are the (reputedly pink?) Apple dots to the pink or other color humidity indicator
dots that are quite widely used in shipping?
Whats the difference between the two,
The cobalt II chloride free ones look like this
The cobalt II chloride
ones look like this (they are red)http://www.google.com/search?q=cobal...ndicator&hl=en
Who manufactures the Apple dots, and what kind of testing have they been subjected to to ensure they in reality only measure water thats abnormal..and don't ALSO register humidity, under normal micro-climactic
conditions? (which vary quite a bit both indoors and outdoors)
For example, RH near a cold wall or floor (north side of house, or outer wall, for example) or in an air conditioned area near a source of moisture like a kitchen, or in a finished basement, normally soars..
Cold air flows downward, and when it meets warm air, the moisture in the warm air will condense.
If little dots can be used to make big decisions
.. that is very important. For example, the temperature where an iphone is put at night might get cold.. when the iphone is then put in a pocket, it may be cold enough for a while to have water condense inside.. Or what if its wearer goes outside in the summer, without an air conditioned shell around him or her?
The same is even more true for a computer..which can go from cold and closed to on, and having air pulled in to it.
Given that cobalt II chloride dots are widely used to test for humidity, and normal humidity in the US can range up to 90%- (I saw that once this last summer!)
its an important question.. Has any decision dot
been tested by independent entities to gauge the resistance to normal HUMIDITY conditions in homes and offices? And pockets?
Humidity indicators are standardized-
Google "IPC/JEDEC J-STD-033" or
"MS 20003-2" or "EIA583" or "MIL-I-8835"
They are used globally to disclose if a shipped product has been subjected to high humidity. Humidity, and the variables involved in same is the reason many products are shipped with a dessicant like silica gel. But, humidity is also a normal issue in homes. Humidity high enough to turn a humidity indicator red is not an abnormal condition in homes, or pockets.
Humidity is a constant in the tropics, and in the summer, in much of the US as well..(the only area that is immune is the Southwest desert area)
The combination of air conditioning and humid weather equals condensation.. Liquid water.. Like when your glasses fog up..
Also, a window open, i.e. ventilation - which means fresher air, also means that humidity indoors will spike, when it rains, just as it does outdoors. water can condense on walls if cold conditioned air meets warm indoor or outdoor air..
Micro-climates also exist anywhere that is close to cold walls or floors. A typical finished basement will have micro-climates routinely. Its normal. A non-contact thermometer and a humidity sensor can show them. Humidity indicators (which are typically made from cobalt chloride) will change color in a humid micro-climate situation. Micro-climates also occur anywhere human skin is nearby.http://en.wikipedia.org/wiki/Humidity_indicator_card