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* Add required thermocouple length. Multiples of 6” (152.4 mm) starting at 12” are in stock.
.
Typical
Application
Protection
Tube
Wire
Gauge
Type K
Alumina
99.8% Aluminum Oxide,
Alumina has a maximum service temperature of
3450°F (1900°C) in both oxidizing and reducing
atmospheres. Alumina is considered to have
better mechanical strength and chemical
resistance than Mullite. Alumina tubes also have
excellent abrasion resistance. Secondary metal
tubes can be added for additional protection from
mechanical damage. Alumina tubes are
considered gas tight so they make excellent
primary protection tubes. All tubes, which are
used in horizontal installations and are at
elevated temperatures, should be supported.
Alumina tube can be used as primary protection
tubes on noble (platinum based) thermocouples.
Alumina tubes have a low silica content so they
will not contaminate platinum thermocouple
elements.
Alumina
Single tube, O.D. 3/8” (9.5 mm)
3/8” NPT steel nipple 1 1/2” long
Bushing, 1/2” x 3/8” NPT
24
24S4-AP06N-*-SH
Alumina
Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting
24
24S4-AP11F-*-SH
Alumina
Single tube, O.D. 11/16” (17.5 mm)
3/4” NPT alloy 600 nipple sleeve
Specify sleeve length (
Z
)
24
24S4-AP11N9-Z-*-SH
Mullite Porcelain
Single tube, O.D. 3/8” (9.5 mm)
Plug and Jack
3/8” NPT special steel hex fitting 1 1/2” long
24
24S4-P06HXPJ-RS3-*
Mullite
63.5% Aluminum Oxide,
balance Silicon Dioxide
Mullite has a maximum service temperature of
2900°F (1590°C). It 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 hori-
zontal installations and at elevated temperatures
should be supported. Mullite tubes should not be
used for primary protection tubes on noble metal
(platinum based) thermocouples if the
temperature will exceed 2200°F (1200°C). Above
these temperatures the silica in the Mullite can
contaminate the platinum element if there is not
enough good air circulation inside the tube.
Mullite Porcelain
Single tube, O.D. 3/8” (9.5 mm)
1/2” NPT alloy 600 nipple sleeve
Specify sleeve length (
Z
)
24
24S4-P06N9-Z-*-SH
Mullite Porcelain
Single tube, O.D. 11/16” (17.5 mm)
1/2” x 3/4” NPT steel fitting
24
24S4-P11F-*-SH
Mullite Porcelain
Single tube, O.D. 11/16” (17.5 mm)
3/4” NPT steel nipple 2 1/2” long.
24
24S4-P11N-*-SH
2
3
4
1
6
5
7
Easy to Order -
1 - State quantity
2 - Specify the part number
(ours or competitive)
3 - Specify the length * Multiples of 6” (152.4 mm)
starting at 12” are stocked.
4 - Add letters for mounting attachments
5 - For Double Element Assembly add “D” to the
part number (
24D4D-P11F-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
number
24S4-P11F-24-SH
signifies A 24 gauge, Type S complete assembly, 11/16”
OD Mullite tube, 24” long, a 1/2” x 3/4” steel fitting, and a Standard Head (
SH
). Other
combinations of thermocouples and tubes can be specified depending on your applica-
tion.
!
Note:
If you would like to order a Type B, or Type R assembly, just substitute
the S with an B, or R in the part numbers listed on this page.
Page 20
Phone: 617.527.4385 Fax: 617.964.3746 Email:
sales@asrichards.comStraight Assemblies - Ceramic Tubes - Types B, R & S - Standard Head, Aluminum