Michell Instruments’ S8000 Integrale chilled
mirror hygrometer is able to handle sample gas at pressures of up to 250 psig.
This results in a reduced response which can save users time and money in dry
applications – such as compressed air and bottled gases – where low
dew-points are reached.
Pressurizing the sample speeds up the response time
because the gas will have a higher dew point than the same sample at
atmospheric pressure. This is because the water molecules are squeezed closer
together under pressure making the sample ‘wetter’ than it would be
at atmospheric pressure.
For example, a pressure dew point of -20°F at
250psig is approx. equivalent to an atmospheric dew point of -65°F. With
the higher dew point under pressure, the S8000 is able to reach the temperature
and stabilize much faster than with the lower atmospheric dew point.
Operating at higher pressure has the additional benefit
of removing the need to reduce pressure on the inlet of the chilled mirror
device. The sampling system is accordingly greatly simplified by eradicating
potential uncertainties associated with the use of pressure reducing devices
which are prone to water vapor contamination. This is of particular benefit to
compressed air systems.
The S8000 is a Precision Dew Point Meter with an
operating range from -75ºF to +105ºF with accuracy of ±0.18%
dew point and excellent stability. Response speed of the instrument has been
further enhanced with updates to the firmware to allow the tracking of any
minute dew point changes in the sample gas.
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For further information, please contact
Jack Herring, Sales and Marketing Manager,
Michell Instruments Inc.
319 Newburyport Turnpike
Rowley, MA 01969
Tel : 978 484 0005
Fax : 978 843 7669
Web : http://www.michell.com/us