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Instructions for
GASTEC
No.136L Methyl Bromide Detector Tube
FOR SAFE OPERATION :
Carefully
read
th
is
manua
l
and
the
instruction
manual
of
your
Gastec
Gas
Sampl
in
g
Pump.
.&WARN
ING:
1.
Use
only
Gastec
detector
tubes
in
a
Gastec
Pump.
2.
Do
not
interchange
or
use
non
-
Gastec
parts
or
components
in
Gastec
's
detector
tube
and
pump
system.
3.
Using
non
-
Gastec
parts
or
componen
ts
in
Gastec's
detector
tube
and
pump
system
or
using
a
non-Gastec
detector
tube
wi
th
a
Gastec
pump
or
using
a
Gastec
detector
tube
with
a
non-
Gastec
pump
may
damage
your
detec
to
r
tu
be
and
pump
system,
or
may
cause
serious
i
njuries,
or
death
to
the
end-user
. It wi
ll
also
void
all
warranties;
a
nd
guarantees
regarding
performance
and
data
accuracy.
.& CAUTION :
If
you
do
not
observe
the
following precautions, you may
suffer injuries
or
damage
the
product.
1.
When
breaking
the
tub
e
ends,
k
eep
away
from
eyes.
2.
Do
not
to
u
ch
the
br
oken
glass
t
ubes
,
piec
es
and
reagent
with
bare
hand(s).
3.
The
sampl
in
g
time
represents
the
time
nec
essary
to
draw
the
air
sample
through
the
tube
.
The
tu
be
m
ust
be
pos
i
tioned
in
the
desired
sampling
area
f
or
the
en
tire
sampling
time
or
until
t
he
flow
finish
in
dicator
ind
icates
the
end
of
th
e
sample.
.6.NO
TES:
For
maintaining performance
and
reliability
of
the
test
results.
1.
Use
Gastec
Gas
Sampling
Pump
t
oget
h
er
with
Gastec
Detector
Tubes
only
fo
r
the
pu
rpos
es
specified
in
the
ins
truct
i
on
manua
l
of
the
detecto
r
tub
e.
2.
Use
this t
ube
within
the
tempe
rat
ure
range
of O -
40°C
(32
-
104
°F).
3.
Use
this
t
ube
wi
t
hin
t
he
rela
t
ive
humidity
range
of
O -
90%
.
4.
This
tube
may
be
interfered with
by
the
coex
is
ting
gases.
Please
refer
to
the
'I
N
TER
FE
RE
NCES'
below.
5.
Shelf
life
and
storage
condi
ti
ons
of
t
he
tube
are
marked
on
the
label
of
the
tube
box.
APPLICATION OF
THE
TUBE :
Use
this
tube
for
t
he
detection
of
Methyl
Bromide
in
air
or
the
industr
ia
l
areas
and
determining
the
environmenta
l
atmosp
he
ric
condition.
SPECIFICATION :
(As
a
re
su
lt
of
Gastec's
commitment
to
continued
improvement,
spec
i
ficat
i
ons
are
subject
to
change
wi
thout
not
i
ce)
Oxidlzil\jj
Layer
cl
Gif
!!
GijH
~
?=!t
ll
xll©:>
~
~ ~
1
~
►
~ ~
I
Detecting
Layer
MeasurinQ
RanQe
2.5-10
oom
I
10
-
100
nnm
100-200
oom
Number
of
Pumo
Stro
k
es
4 I 1
1/2
Correction
Factor
1/4
I 1 2
Samplinonme
1.5
minutes
oer
oumo
stroke
45
seconds
Detectina
Limit
0.5
oom
(n=4l
Colour
Chanae
Wh
it
e
.....
Yellow
React
i
on
Principle
CH.Sr+
i,Os +
H,S,O,
-
Br,
Br,
+
o-
T
olidine
.....
Yellow
Holoou
in
one
Coefficient
of
Variation :
10%
(for
10
to
20
ppm), 5% (for
20
to 100 ppm)
**Shelf Life : Please refer to
the
Validity Date printed on the tube box.
**Store the tubes
in
dark and cool place.
CORRECTION FOR TEMPERATURE, HUMIDITY AND PRESSURE :
Temperature : No
correction
is
requi
re
d
between
O -40't:
(32
-
104°F)
.
Humidity :
No
correction
is
required
between
O -
90%
R.
H.
Pressure :
To
correct
for
p
ress
ure,
use
the
fo
rmula
be
low
Tube
Reading•
(ppm)
x
1013
(hPa)
Atmospheric
Pressure
(hPa)
*
This
value
is
after
other
correction(s},
it
any,
are
applied.
MEASUREMENT PROCEDURE:
1.
For
check
i
ng
the
leakage
of
the
pump,
in
sert
a
fresh
ly
sealed
detec
t
or
tube
into
the
pump
.
Follow
the
ins
tru
ctions
provided
with
the
pump
opera
ti
on
manual.
2.
Break
the
t
ips
off
a
fresh
primary
tube
and
analyser
tube
us
i
ng
the
tube
tip
brea
k
er
of
the
pump
.
3.
Connect
the
©
ma
rk
ed
e
nd
s
with
rubber
t
ubing
after
snappi
ng
off
each
end.
4.
Insert
the
an
alys
er
tube
securely
into
pump
in
l
et
wi
th
the
arrow
(
G
►
)
on
the
tube
poin
t
ing
toward
the
pump.
5.
Make
certain
the
pump
handle
is
all
the
way
in.
Align
the
guide
marks
on
t
he
pump
body.
6.
Pull
the
handle
all
the
way
out
until~
locks
at
one
pump
stroke
(100
ml}.
Wait
1.5
minu
t
es
and
co
nfi
rm
the
completion
of
t
he
sampling.
7.
For
sma
lle
r
measuremen
ts
les
s
than
10
ppm,
repeat
the
above
sampling
procedure
three
more
ti
mes.
For me
as
u
rements
highe
r t
han
100
ppm,
prepare
a
fresh
tube
and
perform
a
halt
pump
st
rok
e.
8.
Read
concentra
ti
on
level
at
the
interface
whe
re
the
stained
r
eagent
meets
th
e
uns
t
ained
reagen
t.
9.
If
n
ecessary,
multiply
the
read
i
ngs
by
the
correction
factors
of
pump
stroke
and
atmospher
ic
pr
essu
re.
INTERFERENCES :
Substance Interference Change colour
by
itself
to
Chlor
i
ne,
Bromine
,
NOx
+
Yellow
Saturated
HaloQenated
Hydrocarbons
+
Yellow
The
table
of
this
in
te
rference
gases
primari
ly
expresses
the
in
terference
of
each
coexisting
gas
in
the
gas
concentration
range,
equivalent
to
the
gas
concentra
tion.
Therefore,
the
test
resu
lt
may
be
given
positive
r
esu
lt
by
th
e
other
substances
no
t
listed
in
the
tab
le.
For
more
i
nformation
is
needed,
please
contact
us
or
our
distributors
in
your
territory
APPLICATION FOR OTHER SUBSTANCES :
Tube
136L
can
also
be
used
for
other
substances
as
below·
Substance
Correction
Factor
No.
of
Pump
Strokes
Measurin11
Ran11e
Ch
l
orobromomethane
1
.1
1 11-110
ppm
1,
1-Dibromoethane
0.7 1 7-70oom
1,2
-D
ibromoe
than
e 0.8 1 8-sooom
Dibromomethane
05
1 5-50opm
E
thvl
bromide
1.0
1/2,
1, 4
2.5-200oom
n-
Butvl
bromide
1.0 1 10-
100
oom
11
20
46 82 100
10
20
40
60
80
100
(2)
Bromform
5 10
20
30
40 50
n=
1
10
20
40
60 80
100
CORRECTION FACTOR :
Detector
tu
bes
are
p
ri
marily
designed
to
measure
spec
i
fic
gases.
But
it
is
al
so
possible
to
measure
other
substances
of
similar
chemica
l
properties
with
the
aid
of
a
correction
factor
or
chart.
Therefore,
please
make
use
of
the
correct
i
on
facto
r
/chart
measuring
ranges
as
a
reference.
Fo
r
more
prec
ise
factor
pl
ease
contact
your
Gastec
distributor.
DANGEROUS AND HAZARDOUS PROPERTIES :
Threshold
Limit
Va
lue-Ti
me
Weighted
Average
by
ACGIH
(2022):
1
ppm
Exp
lo
sive
Range
:
10
-
15
%
DISPOSAL INSTRUCTION :
Reagent
of
the
primary
tube
uses
a
small
amount
of
hexava
l
ent
chromium
.
Reagent
of
the
analyser
t
ube
uses
a
small
amount
of
hexavalent
chromium.
When
di
sposing
the
tube
regardless
of
used
or
unused
,
follow
the
rules
and
regula
tions
of
the
local
government.
WARRANTY:
If
you
have
any
questions
regard
in
g
gas
detect
i
on
and
qual
ity
of
t
he
tubes,
pl
ease
fee
l
free
to
contact
yo
ur
Gastec
representat
i
ves.
Manufacturer
:
Gastec
Corporation
8-8-6
Fukayanaka,
Ayase
-
City,
Kanagawa
252-1195,
Japan
h
ttps://www
.
gastec.eo.jp/
Telephone
+81
-
467-79-3910
Facsimi
le
+81-467-79-3979
IM00136LE4
Printed
in
Japan
23812
/