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Straight Thermocoupfe
Assembfies
*
Ceramic Protection
Tub€s .
Types'Ej
';
K'&'N'r'$ltdhdeid
eat
Uffinuffi'ffied
Easy
to
Order-
1
-
State quantity
2 -
Specify
the part
number
(ours
or
competitive)
3 -
Specify
the
length
.
multiples
of 6" (152.4
mm)
are
stocked
4
-
Add
letters
for
mounting attachments
5
-
For Double
Element
Assembly add
D
to
the
to the
part number.
(1
4K4D-P11
F-12-SH)
Example:
The part number
describes
the thermocouple giving the
gauge,
type of wire, construction,
tube
length
and
mounting
device,
if
any.
The
part num-
ber
8K4-P11
F-24-SH signifies
an
8
gauge,
Type K
complete assembly,
11116"
O.D.
Mullite
tube,24"
long, a112"
x3l4"
steel
fitting,
and a standard weatherproof
aluminum
head.
Other combinations of thermocouples and tubes can be
speci-
fied depending
on
your
application.
I
Nore:
tf
you
would tike to order
a
Type
E,
J, or
Type
N
asse
mbly, iust
substitute
the
K
with
a
E,
J, or
N
in
the
part numbers listed on
this page.
Mullite
Mullite has
a
maximum service temperature of
2900'F (1590'C).
lt
is
considered
to be
better
than
Alumina for thermal
shock
resistance.
Mullite tubes should
be
used with care, since they
have
poor
mechanical
shock
resistance.
Secondary metal tubes can
be added
for
protection
from
mechanical
damage.
Mullite
tubes are
considered
gas tight
at
high
temperatures.
All tubes which
are
used
in
horizontal installations and at elevated
temperatures should
be supported.
Mullite tubes
should not
be
used for primary protection tubes
on noble metal (platinum based) thermocouples,
Mullite
Porcelain
63.5
% Aluminum Oxide, balance
Silicon
Dioxide
Construction-
|
Single
tube,
O.D.
3/8"
(9.5mm)
3/8"
NPT steel hex
nipple 1
112" long. With plug and jack
14
14K4.PO6HXPJ.K3.*
Mullite Porcelain
63.5
% Aluminum Oxide, balance
Silicon
Dioxide
Construction-
2
Single
tube,
O.D.11116"
(17.Smm)
112"
x314"
NPT steel fitting.
8
14
gK4-P11 F-*-SH
14K4-P11F-.-SH
Mullite Porcelain
63.5
% Aluminum Oxide, balance
Silicon
Dioxide
Construction-
3
Single
tube,
O.D
.
11116)
(17.5mm
314'
NPT steel nipple
2112"
long.
8
14
gK4-P11N-*-SH
14K4-P11N-*-SH
Mullite Porcelain
63.5 % Aluminum Oxide, balance
Silicon
Dioxide
Construction-
4
Single tube, O.D.11116" (17.5mm) with alloy sleeve
314"
NPT alloy
600
nipple sleeve
Specifu sleeve length
(Z)
B
14
8K4-P11 Ng-Z-.-SH
',14K4-P11
Ng-Z-*-SH
Silicon
Carbide
Silicon Carbide
has
a
maximum service
temperature
of
2730"
F
(1500"C).
lt
has excellent
resistance to thermal shock and the cutting action
of
flames.
Howevet
silicon
carbide
tubes are
porous
so
they should not
be
used if
a
gas tight
seal is
required
for
protection of the thermocouple
element.
Because of their porousity, silicon
carbide is
usually used
as
secondary
thermocouple protection
tube.
The SCI
type
silicon
carbide
tubes
are isopressed
around
a
steel inner protection
tube.
This creates
a
gas
tight
unit,
which is then
considered a
non-porous
tube.
Silicon
Carbide
90.0%
Silicon Carbide
,9"/"
Silicon
Dioxide
Construction-
'
-
5
Single tube,
O.D.1
314"
(44.5mm)
2.0"
Male NPT machined steel
bushing.
I
14
8K4-SCB-*-SH
14K4-SCB-*-SH
Silicon
Carbide
90.0% Silicon
Carbide
,9"/" Silicon
Dioxide
Construction-
6
Single tube, lsopressed over
a
112"
steel pipe.
O.D.
2.0"
(50.8mm).
8
14
8K4-SC112-.-SH
14K4-SC|12-.-SH
Silicon
Carbide
90.0% Silicon Carbide
,9"/" Silicon
Dioxide
Construction-
6
Single tube, lsopressed over
a
314"
steel pipe.
O.D.
2.0"
(50.8mm)
8
14
8K4-SCl34-*-SH
14K4-SCl34r-SH
Silicon
Carbide
90.0%
Silicon
Carbide
,
9"/o
Silicon
Dioxide
Construction-
SCP
'
v
tv
7
Single tube,
O.D. 1
314"
(44.5mm)
FSC1216 cast
iron fitting with stainless steel set screws.
nn
ijnne
for
scc
type
tubes.
8
SCFC cast
iron clamp fitting
for SCP
type tubes.
q,
8
14
8
14
8
14
8K4-SCP.*.SH
14K4-SCP-"-SH
gK4-SCFL-*-SH
14K4-SCFL-.-SH
8K4-SCFCJ.SH
14K4-SCFC-.-SH
*
Add
the required thermocouple length
(.) as
the
suffix.
Multiples of
6"
(1€.4m!)
are
n
stock.
Page
18