Honeywell XNX-UT Series

XNX Universal Transmitter
Specications
153
Notes
• The gures of cross-sensitivity are typical values and art not to be used as a basis for cross-calibration.
• Do not scale cross-sensitivities (they may not be linear).
• For some cross-interferents breakthrough may occur if gas is applied a longer time period.
• There are many gases and vapors that can poison electrochemical cells. It is difcult to give a complete and exclusive list of all species
which will have an effect on the sensors. However, these are some common substances which must be avoided:
• Airborne greases - These may block gas access into the sensors and therefore reduce sensitivity.
• Silicone compounds - These are often found in sprays, aerosols, lubricants, polishes, adhesives, sealants, zebra strip, cleaning agents,
and oor waxes. These compounds tend to reduce the sensitivity of the sensors and generally will have a permanent effect.
• Solvents and organic vapors - Many organic vapors will damage the sensors. Some common ones are IPA, toluene, xylene, other
benzene derivatives, petrol, and diesel. It is difcult to give a full list of organic vapors, as there are so many of them. Generally, any
organic vapor must be avoided.