Thread Number: 18010
turbidity
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Post# 293398   7/29/2008 at 19:53 (3,423 days old) by cuffs054 (GA)        

Since my dishwasher can tell how dirty a load is, why not a clothes washer?




Post# 293438 , Reply# 1   7/30/2008 at 00:52 (3,423 days old) by thomasortega (Los Angeles - CA)        
I can answer that...

easily because I tried to include this function many years ago in a project.

because the dishes don't fade... If the water is not clear, it's because it's dirty.



Imagine the situation:
You put your brand new black shirt to wash...
select cold water, light soil, and the quickest cycle, because it's new and obviously not dirty.

How will the water be? clear or black because of the dye?

The washer would make a huge mistake and increase the wash time or the mechanical action.



Post# 293442 , Reply# 2   7/30/2008 at 01:49 (3,423 days old) by launderess (Quiet Please, Thereīs a Lady on Stage)        

launderess's profile picture
Also consider many detergents and or other laundry products make water "cloudy", especially when non-phosphate builders are used for powdered detergents. For instance soap will make cloudy wash water. How would a washing machine tell if the water is not clear because of soiling, or another reason?

Post# 293537 , Reply# 3   7/30/2008 at 11:01 (3,422 days old) by pdub (Portland, Oregon)        
Thomas

pdub's profile picture
Brilliant answer! I'm impressed.

Post# 293562 , Reply# 4   7/30/2008 at 12:42 (3,422 days old) by newwave1 (Lincoln, United Kingdom)        

newwave1's profile picture
There are machines on the market with turbidity sensors! Bosch made one, gorenje make one! Asko make one! An inferred beam detects the cloudiness of the water and decides weather extra rinsing is necessary! They cost alot of dosh. hence there aren't many of them!

Darren


Post# 293585 , Reply# 5   7/30/2008 at 14:13 (3,422 days old) by thomasortega (Los Angeles - CA)        

Yes, there are...

But honestly, they are not acurate for the same reasons.

If youīre washing a brand new shirt (same example), itīs obvious it can release some dye.
Why rinse more times if you know itīs only dye?





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