On-line Concentration Measurement of Sulfuric acid - Anton Paar.com

::: Application Report
On-line Concentration Measurement of
Sulfuric acid “H2SO4”
Relevant for:
Online concentration measurement of H2SO4 and Oleum
Installation
Depending on the requirements the density
and/or sound velocity transducers can be
installed at different sites in the process.
0-90 % w/w
For this application the DPRn sensor must be
made of tantalum which shows an excellent
resistance against sulfuric acid between 0-75 °C.
For the measurement of oleum the DPRn
transducer must be made of glass.
DPRn
Fig. 3: Bypass installation of the DPRn
mPDS 1100
TEMP+16.14 : °C
PER-D: 2574.976 us
DENS: 1.33317 g/cm3
Ai-curr: 0.160 mA
L
06
ESC
ENTER
mPDS 1100
90-100 % w/w
For H2SO4 concentration in the range of 90 to
100 % w/w a gold plated SPRn sound velocity
transducer is used. The gold plated SPRn
transducer is inserted into the line using standard
fittings (DIN 2633, DN40 PN16). All wetted parts of
the transducer are gold plated to prevent corrosion
of the transducer material by sulfuric acid.
4
SPRn
TEMP+16.14 : °C
Fig. 4: In-line installation of the SPRn
PER-D: 2574.976 us
DENS: 1.33317 g/cm3
Ai-curr: 0.160 mA
L
06
ESC
ENTER
mPDS 1100
Density or sound velocity and temperature are
transferred to the mPDS 1100 by a two wire cable.
The same cable powers the transducer and it can
be of almost any length.
90-110 %w/w
For the measurement range over 100 % the DSRn
sensor which delivers density, sound velocity and
temperature is needed. As evaluation unit the
mPDS 5 have to be connected. Because the
DSRn is only available in Hastelloy the maximum
temperature must not exceed 40 °C!
DSRn
Fig. 5: Bypass installation of the DSRn
mPDS 1100