Is there any difference between moisture and a humidity measuring equipment?

As you said they appear and do do the same job - no difference.

Try this link: http://www.globalspec.com/Goto/GotoWebPage?gotoUrl=http%3A%2F%2Fwww%2Erotronic%2Ecom%2F%5Fupload%2Fgen%5Fdownloads%2FFA%5FIn%5Fthe%5Flab%5FEN%2Epdf&gotoType=TechArticle&VID=425&CategoryID=179&context=Comparing%20Humidity%20Instrumentation%20%28%2Epdf%29

The page has a number of links for what you are asking - and some others that are worth reading, to help define what you may not be considering. Most of the articles are written by companies that sell the products you may be interested in purchasing.

Thank you for your reply. The link takes me to a pdf file from Rotronic, but does not take me to a page with a number of links. Could you please check the link is correct?

I'm sorry - try this cleaned up link. I've been doing a little research on this subject at work and saved a bunch of links on this subject. I have a lot of stuff saved in pdf and doc files, but don't know how to attach them on this site. I'll attach a couple of other links that may be helpful. The first link is what I tried to give you earlier.

http://engineering-tools.globalspec.com/TechArticles/Articles?CategoryID=179

http://www.hydraulicspneumatics.com/

http://www.boschrexroth.com/corporate/en/products/technology_areas/index.jsp

http://www.omega.com/manuals/index.html?s=all

The last site is an index of all the test and measurement equip sold by Omega. They have some very nice data loggers that measure temp, press, and moisture - you can work backwards from the paged link or do a directed search to find the products that are relevant for you. Hope this helps.

In this field, terminology can be confusing and words are sometimes not correctly used.
Moisture is often measured in absolute units such as PPM, milligrams/liter, lbs/million ft*3, dew point temperature, etc. Humidity most often refers to relative humidity, which is the amount of moisture in a space relative to the amount required to saturate the same space at that pressure and temperature. It is measured in percent RH. Most technical instrumentation measures moisture. Moisture measurements can be converted to relative humidity if required. There are many instruments available to measure moisture. Which one is best for your application depends on the accuracy you require, the amount of water in your air, the response time you require, and how often you need to calibrate the equipment. I am old fashioned, so I like chilled mirror hygrometers. They are simple and don't require calibration. But they are relatively slow. If you need to track transient changes in moisture you may want to look at ring-down laser technologies. Above all, you should become familiar with the terms and the physics. For that, I recommend reading "Clouds in a Glass of Beer" by Craig F. Bohren.

Having worked some years with environmental measurement I found that humidity was often used in connection with air and moisture when measures in solids were taken - but I don`t know whether thats a real correlation or not based on the language.

Apart from that, the equipment does not differentiate between these measurements but the construction of sensors maybe very different because they have to be protected as they are mechanically sensible.

Regard that humidity- or moisture-measurements are mostly rather temperature sensitive. If you need good results you should perhaps think about a solid state radar based system with one reference and one probe chamber where such influences are minimised.
Regards Uwe

UWEKA answered 100% complete .

All that is Necessary and Sufficient!

Check out this link: www.aquameasure.com

My first job out of school was building, calibrating, & troubleshooting their moisture computers. They tend to be referred to as moisture equipment when you are using them to measure the moisture content of another material/product:

that will be sold by weight, such as powders, roasted nuts, rolls of paper used for newspapers, etc.

or that needs to be controlled during a process

Humidity eqiupment tends to be applied when measuring moisture content of an environment.

In your particular case, it probably could be either. It could be treated as a material within a pipe or a small controlled environment.

Look at the technologies to see which is best suited for your needs. Many of the moisture meters use simple capacitance. By knowing the dielectric constant of a material, a moisture meter measures dielectric value and the difference is the percentage of moisture content.

If I understand you correctly, than the reason for measuring is some moisture sensitive equipment at the end of your pressurized pipe.... If this is the case, than what you really want to know is the water molecule content. for that matter humidity and moisture are the same. only difference being that RH is measured by % off saturation, and moisture is an absolute number expressed in weight/volume. and is usually, but not always related to water content of solids

hope it helps.

Wangito.