A
photoacoustic
module
based
on
a
novel
273
nm
deep-ultraviolet
light-emitting
diode
(DUV-LED)
was
developed
for
sulfur
dioxide
(SO
2
)
detection.
The
DUV-LED
with
an
emission
angle
of
60°
emitted
power
10
mW.
high-sensitivity
non-resonant
cell
gas
chamber
volume
only
0.39
mL
introduced
to
reduce
the
thermal
noise
generated
by
contact
scattered
DUV
light
cell.
Assembly
resulted
in
robust
and
portable
without
any
moving
parts.
minimum
detection
limit
725
ppb
achieved
1s
integration
time
at
room
temperature
atmospheric
pressure.
Furthermore,
performance
evaluated
terms
modulation
frequency,
linearity
long-term
stability.
A
photoacoustic
module
based
on
a
novel
273
nm
deep-ultraviolet
light-emitting
diode
(DUV-LED)
was
developed
for
sulfur
dioxide
(SO
2
)
detection.
The
DUV-LED
with
an
emission
angle
of
60°
emitted
power
10
mW.
high-sensitivity
non-resonant
cell
gas
chamber
volume
only
0.39
mL
introduced
to
reduce
the
thermal
noise
generated
by
contact
scattered
DUV
light
cell.
Assembly
resulted
in
robust
and
portable
without
any
moving
parts.
minimum
detection
limit
725
ppb
achieved
1s
integration
time
at
room
temperature
atmospheric
pressure.
Furthermore,
performance
evaluated
terms
modulation
frequency,
linearity
long-term
stability.
