001 Front Cover

g ht Thermocou ple AssemblleC"-, $ Ceramic Protection Tubes'i f

Stra i

Easy to Order-

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 24S4-P11F-24-SH signifies a 24 gauge, Type S complete assembly, 11116" O.D. Mullite tube,24" long, a112" x314" steel fitting, and a standard weatherproof aluminum head. Other combinations of thermocouples and tubes can be speci- fied depending on your application. ! No1re: tf you would like to order a Type B, or Type R assembly, iust substitute the S with a B, or R in the part numbers listed on this page.

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. (24S4D-P11F-12-SH)

Alumina

Alumina Alumina has a maximum service temperature of 3450"F (1 900'C) in both oxidizing and reducing atmospheres. Alumina is considered to have better mechanical strength an chemical resitance than mullite. Alumina tubes also have excellent abraison 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 at elevated temperatures, should be suppofted. Alumina tubes can be used for primary protection tubes on noble metal (platinum based) thermocouples. Alumina tubes have a low silica content so they will not contaminate plati num thermocouple elements. 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 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

99.8 % Aluminum Oxide

Construction-

2

24S.APO6N.--SH

24

Single tube, O.D. 3/8" (9.Smm) 3/8" NPT steel nipple 2112" long .

Alumina 99.8 % Aluminum Oxide Construction-

rt_F

3

24S4.AP11 F.-.SH

24

Single tube, O.D . 11116" (17.5mm) 112" x314" NPT steel fitting.

Alumina 99.8 % Aluminum Oxide Construction-

4

2454-AP11 N-.-SH

24

Single tube, O.D . 11116) (17.5mm 314" NPT steel nipple 2 112" long.

Mullite Porcelain 63.5 % Aluminum Oxide, balance Silicon Dioxide Construction- | Single tube, O.D. 3/8" (9.Smm) With plug and jack. 3/8" NPT steel hex nipple 1 112" long Mullite Porcelain 63.5 % Aluminum Oxide, balance Silicon Dioxide construction- ,n r.- .--\ 5 Mullite Porcelain 63.5 % Aluminum Oxide, balance Silicon Dioxide Construction- (, Single tube, O.D. 11116) (1 7.5mm 112" x314" NPT steel fittinq. Mullite Porcelain 63.5 % Aluminum Oxide, balance Silicon Dioxide Construction- 7 Single tube, O.D . 11116" (17.5mm) with alloy sleeve 314" NPT steel nipple 2 112" long. Single tube, O.D. 3/8" (9.5mm) 3/8" NPT alloy 600 nipple sleeve Specifu sleeve length (Z)

2454-P06HXPJ-RS3-*

24

24 2454-P06N9-Z-*-SH

24s,4-P11 F-*-SH

24

2454-P11 N-*-SH

24

. Add the required thermocouple length (.) as the suffix. Multiples of 6" (152.4mm) are in stock.

Page 20