Emerson Process Management GmbH & Co. OHG
3-18
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
10/2012
3.4 Trace Moisture Measurement
Component
Maximum Permitted
Concentration / ppm
Maximum Permitted Dew-
point / °C
Oxygen
O
2
no limit
no limit
Ozone
O
3
not permitted
Perchloric acid
HClO
4
not permitted
Phosgene
COCl
2
no limit
-20
Propane
C
3
H
8
no limit
no limit
Sodium hydroxide
NaOH
not permitted
Sulphur dioxide
SO
2
no limit
6
no limit
Sulphur hexafluoride
SF
6
no limit
no limit
Sulphur trioxide
SO
3
no limit
-20
Sulphuric acid
H
2
SO
4
10
-20
Toluene
C
6
H
5
CH
3
no limit
no limit
Xylene
C
8
H
10
no limit
no limit
1
Recommended sensor exchange after 6 months.
2
For refinery catalytic reformer applications, consult with EMERSON.
3
Consult with EMERSON for extremely sour natural gas, >1 % H
2
S
4
Consider sacrificial gold filter to remove mercury vapour – Consult with EMERSON.
5
Consult with EMERSON - for impedance type sensors, recommended concentration limit of Methanol <10%
of moisture concentration to be measured to ensure negligible interference effects.
6
At temperatures exceeding 50 °C (122 °F), the maximum concentration is 50 ppm.
Tab. 3-7:
Limitation on Gases (II)
The sensor should also be resistant to most organic acids, alcohols, ketones, aldehydes, esters and halogenated hydrocarbons, but will not be
resistant to very strong alkalis. If in doubt, consult with EMERSON.
Summary of Contents for Rosemount X-Stream Series
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