Selecting a dewpoint instrument for compressed air

An App Note by Vaisala

DMT340 Series Dewpoint and Temperature Transmitter

Woburn MA, USA –?? At some point you may have wondered, where to start when selecting a dewpoint meter for a compressed air application. The selection process can be quite time consuming and even confusing due to the number of choices and options available.

However it???s a good idea to choose carefully since your choice can significantly affect the accuracy and stability of the measurement, the performance of your system, and consequently, the quality of your finished product.

A free Vaisala App Note guides one to the answer via four key questions which they, as experts in moisture measurement in gases, have found to be helpful in narrowing down the choices.

1. What type of platform do you need – fixed or portable?
2. What type of dryer are you using?
3. What are the pressure and temperature at the measurement location?
4. Will the measurement be made directly in the line or using a sample cell

One of the most important measurements to ensure a clean and dry compressed air system is dewpoint.

Since dewpoint measurements can be made almost anywhere on the supply or demand side of a system, the application conditions and instrument requirements can vary significantly.

Furthermore, sensors must withstand exposure to a number of contaminants like water spikes, ambient humidity, entrained compressor oil, and chemical impurities.

Download A PDF copy of?? the application (app) note here:

Vaisala sensors, of course, can handle all of the above. What???s more, they have the fastest wet-to-dry response time on the market and minimal drift allowing for a 2-year calibration interval.

About Vaisala

Vaisala is a global leader in environmental and industrial measurement. Building on more than 70 years of experience, Vaisala contributes to a better quality of life by providing a comprehensive range of innovative observation and measurement products and services for meteorology, weather critical operations and controlled environments. Headquartered in Finland, the company employs over 1400 professionals worldwide and is listed on the NASDAQ OMX Helsinki. The Vaisala Group has offices and operations in Finland, Northern America, France, United Kingdom, Germany, India, China, Sweden, United Arab Emirates, Malaysia, Japan and Australia.

Vaisala Oyj

P.O. Box 26
FI-00421 Helsinki

Phone:+358 9 8949 3000
Fax:+358 9 8949 2485

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Woburn, MA 01801 USA

Phone:+1 781 933 4500. [Toll-free:1 888-VAISALA (824-7252)]
Fax:+1 781 933 8029

Vaisala Ltd
Vaisala House
349 Bristol Road
Birmingham B5 7SW

Phone:+44 121 683 1257
Fax:+44 163 857 6240