COSA Xentaur Xentaur HDT - Manual (Page 10)

Section 2: Sensor and Sampling Techniques
page 3
2.1 Precautions using the sensor
The Xentaur HTF™ Al
2
O
3
sensor is designed and field
proven to be highly reliable, rugged and maintenance free.
However the user should consider the following precau-
tions:
• To avoid the need for prolonged dry-down (when expecting to
measure dewpoints dryer than -65ºC), do not expose the sensor to
room air longer than necessary (1 - 2 minutes). Thus, do not open
the sensor container before you are ready to install the sensor.
• The sensor container has desiccant to keep the sensor dry during
shipping and to avoid damage due to condensation. Close the con-
tainer immediately after removing the sensor to avoid degradation
of the desiccant.
• Do not throw away the sensor container, you may use it again to
transport the sensor between locations, to store it between uses or
to ship it back to the factory for certification. The container can
be attached to the loop cable, by trapping the cable with the lid
strap.
• Do not expose the sensor to corrosive gases or liquids such as
ones containing Chlorine, Ammonia or HCl. (SO
2
can be moni-
tored when the moisture content is low). Cyanide, Br
2
, I
2
, and
HNO
3
may harm the gold layer of the sensor, thus limiting sensor
life.
• Except for the XTR-60 and XTR-LQ sensors:
1. Do not expose the sensor to liquid water, as it may get damaged.
2. Do not breathe directly onto the sensor, as condensation may
form which could damage the sensor element.
• Do not install the sensor near heat sources such as radiators or
air ducts.
• Do not install the sensor in places subject to extreme mechanical
vibration or shock. If this is not avoidable, use resilient mounting.
If in doubt, call your representative.
• Do not disassemble the porous metal filter encapsulation, as this
will damage the sensor and void your factory warranty.
• Prior to installation of the probe, ensure that no contaminants are
present in the system (e.g. oil, liquid water).