Pyrolysis-Particle
Pyrolysis-Particle Detection
Detection Method
MethodPyrolysis-Particle
Detection Method
Sensor:Sensor: SS
SS
Pyrolysis-Particle
Pyrolysis-Particle Detection
Detection Method
MethodSensor:SS
1.
1. Brief
Brief description
description
Sensor:SS
Sensor:SS

This
Thisgasgassensor
sensorheats
heats thethe detectabledetectable gas
gas totoproduce
produce anan oxideoxide andand measures
measures particles
particlesof
ofthe
the
This
gas
sensorheats
thedetectablegas
toproduce
an
oxide
and
measuresparticles
of
the
oxide
using
oxide
using aadescription
aparticle
particlesensor.
sensor. Maintaining
Maintaining stability
stabilityover
overthethe long
long term,
term,itititexhibits
exhibitsan
an excellent
excellent
1.
Brief
oxide
using
particlesensor.
Maintaining
stability
over
the
long
term,
exhibits
anexcellent1.
Brief
description
interference
resistanceandresponsiveness.
The
sensorissameprinciples
interference
resistanceanddetectable
responsiveness.
Theparticle
particlesensorisbasedbased onon thethesameofprinciplesThis
gas sensor
heats thegas to produce
an oxideandmeasuresparticlestheinterference
resistanceandresponsiveness.
The
particlesensor
is
based
on
the
same
principles
1.
Brief
descriptionThisgas
sensorheatssensor.
thedetectablegas
toproduceanthe
oxidemeasuresparticlesof theas
ionization-basedsmoke
sensorsthatuseradiation.
asfor
for
ionization-basedsmoke
sensorsthatuseradiation.
oxide
using
a particle
Maintaining
stability
overlongandterm,
it exhibits
an excellent
asfor
ionization-basedsmoke
sensorsthatuseradiation.
Thisgas
sensorheats thedetectablegas
toproducean oxideandmeasuresparticlesof theoxide using aresistanceparticle sensor.
Maintaining stability
over thesensor
long term,
it exhibits
excellentinterference
and responsiveness.
The particle
is basedon theansame
principles
oxide using a particle sensor.
Maintaining stability
over the long term,
it exhibits
anexcellentinterference
resistance smokeand responsiveness.
Theradiation.
particle sensor is based on the same principles
asfor
ionization-based
sensorsthatuseinterference
resistanceandresponsiveness.
The
particlesensor
is
based
on
the
same
principles
2.
Structureandprinciples
2.for
Structureandprinciples
as
ionization-basedsmoke
sensors that use radiation.
as for ionization-based smoke sensors that use radiation.

[Structure][Structure][Structure]2.
andprinciples
This
sensoraaacombination
of
ThisStructure
sensoris
istypically
typically
combination
ofaaaheat
heat decomposer
decomposer andand particle
particleThissensoristypically
combinationofheat
decomposer
andparticle2.
Structureandprinciples
2.
Structureandsensor.
Inofheat
sensor.
Inthethe center
centerofthe
theprinciples
heat decomposer
decomposer isisaaaquartz
quartz tube
tube wrappedwrapped[Structure]sensor.
In
thecenteroftheheat
decomposer
isquartztube
wrapped[Structure]
withwithaasensor
aheating
heating
element.a combination of a heat decomposer and particle
Thisis element.
typicallywithheating
element.
[Structure]Thissensoristypically
athe
combination
ameasurement
heatisdecomposer
particleThe
sensor
is
an
of
which
The particle
particlesensorisof
anintegration
ofof
measurement
chamber,which
sensor.
In thecenterheat decomposera quartzchamber,tubeandwrappedThe
particlesensorisanintegrationofchamber,whichThis
sensoristypicallya integration
combination
ofaaaameasurement
heat decomposer
andparticlesensor.
In
thecenteroftheheat
decomposerisaquartztube
wrappedcontinuously
generatesioncurrents
using
α
rays,
and
a
compensation
continuously
generatesioncurrents
using
α
rays,
and
a
compensation
withaheating
element.
continuously
ion currents
using α rays,
a compensation
sensor.
In thegenerates
center of theheat decomposer
is a andquartztube wrappedwitha heatingelement.
chamber.
Detectableenterswithchamber.
Detectablegas
enters only
onlyofthethemeasurement chamber,chamber,which
withThe
particlesensorisgas
an integrationa measurement
chamber.
Detectablegas
entersonly
themeasurement
chamber,withwitha heatingelement.
The
particle sensor
is anion
integrationofaatmosphere.
measurement
chamber,which
thecompensationchamber
open
to
the
the
compensationchamberopen
totheatmosphere.
continuously
generates
currents
using
α
rays,
and
a
compensation
thecompensationchamberopen
totheatmosphere.
The particle sensor is an integration of a measurement chamber, which
continuously
generatesioncurrents
α rays, and a chamber,compensationchamber.
Detectablegas
entersonlyusingthe measurement
with[Principles][Principles]
continuously
generatesioncurrentsusing
α rays, and a compensation[Principles]chamber.
Detectablegas
entersonly
themeasurement
chamber,with
thecompensationchamberopen
totheatmosphere.
Manyoforganic
metal
gases
such
as
TEOS,
when
heated,produceaaa
Manyoforganic
metal
gases
such
as
TEOS,
when
heated,producechamber.
Detectablegas
entersonly
themeasurement
chamber,
with
Many
of
organic
metal
gases
such
as
TEOS,
when
heated,producethecompensationchamber open
tothe atmosphere.
particulateoxide.
gas
throughparticulateoxide. Detectable
Detectablegaspasses
passesthrough thethe heatheat decomposer
decomposerthecompensationchamber open
tothe atmosphere.
[Principles]particulateoxide.
Detectablegas
passesthroughtheheatdecomposer[Principles]tooxidized
andenterstheparticlesensor.
tobecome
becomeoxidized
andenterstheas
particlesensor.
Manyof organic
metal
gases
such
TEOS,
when heated, produce atobecomeoxidized
andenterstheparticlesensor.
[Principles]Manyoforganic
gases gassuchasparticle
TEOS,
whentheheated,produce aInchamberofsensor,analpha-rayInthethe measurement
measurement
chamberofthe
theparticlesensor,analpha-rayparticulateoxide.metal
DetectablepassesthroughheatdecomposerInthemeasurement
chamberofthesensor,analpha-rayManyoforganic
metal
gases suchasparticle
TEOS,
when heated,
produce aparticulateoxide.
Detectablegas
passesthroughtheheatdecomposersource(Americium-241(Am-241))
is
used
to
ionizeair,
causingaaasource(Americium-241(Am-241))
is
used
to
ionizeair,
causingtobecomeoxidized
andenterstheparticlesensor.
source(Americium-241(Am-241))
is
used
to
ionizeair,
causing
particulate oxide. Detectable gas passes through the heat decomposertobecomeoxidized
andenterstheparticlecurrent
toParticles
enter
themeasurement
chamberandcurrent
toflow.
flow.
Particles
enterofthemeasurement
chamber
and absorb
absorbInthemeasurement
chambertheparticlesensor.
sensor,an alpha-ray
current
toflow.
Particles
enter
themeasurement
chamberandabsorbtobecomeoxidized
andenterstheparticlesensor.
Inthethismeasurement
chamberof theparticlean causingalpha-rayions;decreasesion
insensorions;
thisdecreases thethe(Am-241))
ioncurrent,
current,
resultinginreduced
reducedsensoraoutput.
output.
source(Americium-241
isresulting
used tosensor,
ionizeair,
ions;decreasestheioncurrent,
resultingin
reducedsensoroutput.
Inthethismeasurement
chamberof theparticlesensor,an alpha-ray
source(Americium-241(Am-241))
is
used
to
ionizeair,
causing
a
Based
on
the
reductioninoutput,thesensordetermines
the
gas
Based
on
the
reductioninoutput,thesensordeterminesthegascurrent
toflow.
Particles
enter
themeasurement
chamberandabsorbBased onthe reduction (Am-241))in output, thesensordeterminesthegassource(Americium-241
is usedto ionize
air, causingacurrent
todecreases
flow.The
Particles
enter
the chamber
measurement
chambersensor
and absorb
concentration.
compensationcompensatesinconcentration.
The
compensationchambercompensatesfluctuations
in
ions;
this
the ioncurrent,
resultingin reduced
output.
concentration.
compensationcompensatesfluctuations
incurrent
to flow.The
Particles
enter
the chamber
measurement
chamberfluctuations
and absorb
ions;
this
decreasestheioncurrent,
resultingin reduced
sensoroutput.
sensoroutputcausedbytemperature,humidity,
and/orpressure.
sensoroutputcausedbytemperature,humidity,
and/orpressure.
Based
on
the
reductioninoutput,thesensordeterminesthegassensoroutputcausedbytemperature,humidity,
and/orpressure.
ions; this decreases the ion current, resulting in reduced sensor output.
Basedon the reductionin output, thesensorcompensates
determines thegasconcentration.
The compensationchamberfluctuationsin
Based on the reductionin output, thesensor determines thegasconcentration.
The compensationchambercompensatesfluctuations insensoroutput causedby temperature,humidity,
and/or pressure.
concentration.
The compensationchambercompensatesfluctuations insensor output caused by temperature, humidity, and/or pressure.
sensor output caused by temperature, humidity, and/or pressure.

Stationary
Stationary sensor
sensorStationary
sensorExample:Example: SS-1923
SS-1923
Example:SS-1923
Stationary sensor
StationarySS-1923
sensorExample:Stationary sensor
Example: SS-1923
Example:SS-1923 Detectable
Category
Category
Detectable gas
gas
Category
Detectable
gas
Other
Other methods
methods
Other
methods
Category
Category
Category
Other methods
Other methods
Other methods[Heat[Heat decomposer]
decomposer][Heat
decomposer]

Insulator
Insulator
Insulator

HeatingHeatingelement
element
Heating
element[Heat decomposer][Heat
decomposer]
Heating element[Heat
decomposer]
Detectablegas
Detectablegas
Detectablegas

QuartzQuartztube
tube
Quartztube

Insulator
Insulator
Insulator

Heating element
Heating element
Detectable gas
Detectable gas
Detectable gas[Particle[Particle sensor]
sensor][Particle
sensor]Insulator
Insulator
Insulator
Measurement
chamber
Measurement
chamber[Particle
sensor]Measurement
chamber[Particle[Particle sensor]
sensor]Insulator
Insulator
Measurement chamber
Insulator
Gas
Gasrelease
releaseMeasurement
chamberGas
releaseMeasurement chamber

Toxic
Toxic
Toxic
Detectablegas
Detectable gas
Detectable gas
Toxic
Toxic
Toxic

A
AA
A
A
A

From
heat
From
the
heat
Gastherelease
From
the
heat
decomposer
decomposerGasreleasedecomposer
Gas releaseAm-241
Am-241
From the heat Am-241
Fromthe heatdecomposer
V＋
V＋
From
the heatdecomposer Am-241V＋
decomposer
Am-241
Am-241V＋

Quartz tube
Quartz tube
Quartz tube
To
Toparticle
particlesensor
sensorTo
particlesensor

To particle sensor
To particle
sensorHigh-input
impedance
High-input
impedance
To particle
sensorHigh-input
impedance
(open
to
(open
tothe
theatmosphere)
atmosphere)
High-input
impedance
(open
to
the
atmosphere)
High-input impedanceHigh-input impedanceCollector
Collector(open to Collector
the atmosphere)(open to the atmosphere)(open to the atmosphere)
Collector
Collector
Collector
Compensation
Compensation
Compensationchamberchamberchamber
V－
V－
V－
V－
V－
V－

Compensation
Compensationchamber
CompensationchamberchamberV＋ as
3.
3. Features
Features (of(of thethe SSU-1925
SSU-1925 (TEOS(TEOS sensor)
sensor) based
based onon PLU
PLU ++ GD-70D
GD-70Das an
an example)
example)V＋○○○ Output
Output characteristics
characteristics
Aging characteristics
characteristics○
Outputcharacteristics○○ Aging
Agingcharacteristics
3.
Features(of the SSU-1925
100
100 (TEOS sensor) based on PLU + GD-70D as an example)
SensoroutputSensorSensoroutputSensorSensoroutputoutputoutputSensoroutput100
The
sensordepends
onAsradiation
the
TheFeatures
sensor output
outputdepends
on
As thetheonradiation
source,the sensor
sensoruses
Am-241, which
which
3.
(of
the
SSU-1925
(TEOS
based
PLUsource,+ GD-70D
GD-70Dasusesan Am-241,
example)The
sensoroutputdependsonAstheradiation
source,thesensoruses
Am-241,which
3.
Features(oftheSSU-1925(TEOS sensor)
sensor) based
on
PLU
+
as
an
example)○Outputcharacteristics○
characteristics
theconcentrationoftheparticleshas
aaa veryhalf-life,theconcentrationoftheparticles
hasAgingvery long
long
half-life, approximately
approximately 400
400 years,
years, andand
theconcentrationoftheparticles
has
very
long
half-life,
approximately
400
years,
and100○
Outputcharacteristics○
Aging
characteristics
The
sensoroutputdependsonAstheradiation
source,thesensoruses
Am-241,
which○
Outputcharacteristics○
Aging
characteristics
producedthroughheat
thesensorconsequently
hardlydeteriorates
inproducedthroughheat
thesensorconsequently
hardlydeteriorates
in100
producedthrough heatthesensorconsequently
hardlydeteriorates
in
100
The
sensoronAstheradiation
source,thesensorAm-241,
theconcentration
ofdepends
theparticleshas
a verylong
half-life,
approximately
years, whichandThe
sensor output
outputdependsonAstheradiation
source,sensor uses
uses400
Am-241,which
decomposition.
The
sensoruses
performance
over
time.
decomposition.
The
sensoruses
performanceovertime. thedecomposition.
The
sensoruses
performance
over
time.
the
concentrationoftheparticles
has
a
very
long
half-life,
approximately
400
years,
andthroughheat
theconsequently
hardly deteriorates
intheconcentration
theparticles
has sensor
a very long
half-life, approximately
400 years,
andaproduced
curve
so
that
the
a calibration
calibration
curveofsothat
the gasgasacalibration
curve
so
that
the
gas
producedthroughheat
thesensorconsequently
hardlydeteriorates
in
(%)
(%)
(%) 000
decomposition.
The
sensoruses
performance
over
time.
producedthroughheat
thesensorconsequently
hardlydeteriorates
in
concentration
willbelinearwithconcentration
willbelinearwithconcentration
will
be linear withdecomposition.
The
uses
performance
000
15
15
15
a
calibration
curvethat thegasdecomposition.
Thesosensor
sensoruses
performance over
over time.
time.
respect
toreading.
respect
to thethereading.
respecttothereading.
Gasconcentration
concentration(ppm)(ppm)(%) GasGas
concentration(ppm)
acalibration
curve
so
that
the
gas
0
concentration
willbelinear
witha calibration curve so that the gas (%)
0
15
concentration
be
(%) 0
00
respect
to the willreading.
concentration
will
be linearlinear with
with
Gas
Gasrelease
release○○ ResponsivenessResponsiveness○
Temperature
15
Gas
releaseGas
concentration(ppm)○
Responsiveness○○ Temperature
Temperature
respecttothereading.
0
120
120
15
120
120
120
Gas concentration (ppm)
respect
togas
the thatreading.
120
Since
Since thethegasthat entersenters thethecharacteristics
characteristics
Gas concentration (ppm)
Since
the
gas
that
entersthecharacteristics
Gas release○Responsiveness○
Temperaturedetectionsectiondetectionsection isisThe
sensorThe
sensor uses
uses thethedetectionsectionis120
The
sensoruses
theGas release○Responsiveness
120○
Temperature
Gas release
Since
the gasthat entersthe○Responsiveness○
Temperature120
immediately
oxidizedin
immediately
oxidizedin thethecharacteristics
compensationchambercompensationchamber toto120
immediately
oxidized
inthecompensationchamber
to
120
Since
the
gas
that
entersthe120
characteristics
detectionsection
is
Since
the
gas
that
enterstheheat
heat decomposer,
decomposer, thethe sensor
sensorThe
sensor
uses
the
Gas
Gas
characteristics
compensate
temperaturecompensate
temperatureheat
decomposer,
thesensorGas
compensate
temperaturedetectionsectionisThe
sensor
uses
the
entry
entry
immediately
oxidized
thedetectionsectionis inspeed
exhibits
response
exhibits highhighresponse
speed
entry
compensationchambertoThe
sensoruses
theandand thus
thus exhibits
exhibits
exhibits
highresponse
speed
and
thus
exhibits
immediately
oxidized
insensorthecompensationchamber
to
000
000
heat
decomposer,
thein
immediately
oxidized
the
Gas
and
reproducibility.
and excellent
excellent
reproducibility.
compensate
temperaturecompensationchamber
toexcellenttemperatureexcellenttemperatureandexcellent
reproducibility.
excellenttemperature
000 301209090 12060
6030 entry
-30
-30
heat
decomposer,
thesensor
(%)
(%)
Gas
120
90
60
30
compensate
temperature(%)
exhibits
highresponse
speed(%)(%) -30
heat decomposer, the sensor
Gas
and
thus
exhibits
compensate
temperature(%)
characteristics.
characteristics.
Elapsedtime(sec.)
Elapsedtime(sec.)
Temperature
Temperature(℃)(℃)
characteristics.
entry
Elapsedtime(sec.)
Temperature(℃)
exhibits
highresponse
speed
and
0
0
entry
and
excellent
reproducibility.
exhibits
high response
speed
excellenttemperatureand thus
thus exhibits
exhibits
0 30
90 120
60
-30
0
(%) 0
and
excellenttemperature
0 0 30(%) 0and excellent
excellent reproducibility.
reproducibility.
120
90
characteristics.
-30 Temperature (℃)60
excellenttemperature(%)
Elapsedtime(sec.)
0 30
90 120
60
-30
(%)
(%)
characteristics.
Elapsedtime (sec.)
(%)
(℃)
5.
type
(examples)4.
model,
and5. Products
Products ofof this
this
typeTemperature(examples)
4. Detectable
Detectable gas,
gas, molecularmolecular formula,formula,model,and detection
detection
characteristics.
Elapsedtime (sec.)
5.
Products
of
this
type
(examples)4.
Detectablegas,
molecular
formula,model,
anddetection
Temperature(℃)

ChangeinreadingChangeChangeChangeinChange
readingin inreadinginreadingreadingChangeinreadingChangeinreadingChangeChangeChangeinChange
readingin inreadinginreadingreadingChangeinreading

range
range (examples)(examples)
range(examples)
4. Detectable gas, molecular formula, model, and detection
4.
gas,
4. Detectable
Detectablegas, molecularmolecular formula,formula, model,
model, andand detection
detection
range(examples)
range(examples)
Molecular
Detection
Molecular
Detection
Molecular
Detection
range(examples)
Detectable
gas
Model
#
Detectable
gas
Model
#
Detectable gas
Model #
Tetraethoxysilane
Tetraethoxysilane
Detectable gas
Tetraethoxysilane
Detectable(TEOS)(TEOS)(TEOS)
Detectable gas
gas
Tetraethoxysilane
Tetraethoxysilane(TEOS)
Tetraethoxysilane(TEOS)(TEOS)

formulaformulaformulaMolecular
Molecular
C
Cformula
H20
O444Si
Si
888H
20O
C
H
O
Si
20
Molecular
formulaformulaC8H20O4Si
C8H20O4Si
C8H20O4Si

SS-1923
SS-1923
SS-1923
Model
#

Model
SSU-1925
SSU-1925
Model ##
SSU-1925
SS-1923
SS-1923
SS-1923
SSU-1925
SSU-1925
SSU-1925

range
range
range
Detection
Detection
0-15
ppm
0-15
ppm
range
0-15
ppm
Detection
range
range
0-15 ppm
0-15 ppm
0-15 ppm○Stationary
products○Stationary products
products○Stationary
5.
Products ofthis type (examples)...
... GD-70D＋PLU-70
GD-70D＋PLU-70
5.
Products
of
this
...
GD-70D＋PLU-70
5.
Products
ofthis type
type (examples)(examples)○Stationary products
products○Stationary... GD-70D＋PLU-70○Stationary
products...
... GD-70D＋PLU-70
GD-70D＋PLU-70

GD-70D
GD-70D+++PLU-70
PLU-70GD-70D
PLU-70GD-70D + PLU-70
GD-70D + PLU-70
GD-70D + PLU-70