They can be for detecting oxygen levels, measuring any decrease in to detect toxic gases, electrochemical gas detectors monitor for elevated numbers of that gas.
There are many excellent cleaners for the market I chose bleach because it's inexpensive.

My name is Franklyn Baum. I life in Womersley (Great Britain).

Feel free to surf to my blog ... hochdruckreiniger 400 bar

FranklynJ (last edited 2013-05-13 16:19:20 by 23)