Filter
Top Products
Emerson Process Management GmbH & Co. OHG3-18
X-STREAM X2
Instruction Manual
HASX2E-IM-HS
02/2012
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 hexauoride 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 renery catalytic reformer applications, consult with EMERSON.
3
Consult with EMERSON for extremely sour natural gas, >1 % H
2
S
4
Consider sacricial gold lter 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.