Richards Thermocouple and Temperature Sensor Catalog 16

Straight Assemblies - Ceramic Tubes - Types B, R & S - Standard Head, Aluminum

Easy to Order - 1 - State quantity 2 - Specify the part number

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.

(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 )

Typical Application

Protection Tube

Wire Gauge

Type K

Alumina 99.8% Aluminum Oxide,

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

2

24

24S4-AP06N-*-SH

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. 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 63.5% Aluminum Oxide, balance Silicon Dioxide

Alumina Single tube, O.D. 11/16” (17.5 mm) 1/2” x 3/4” NPT steel fitting

3

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 )

4

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

1

24

24S4-P06HXPJ-RS3-*

Mullite Porcelain Single tube, O.D. 3/8” (9.5 mm) 1/2” NPT alloy 600 nipple sleeve Specify sleeve length ( Z )

5

24

24S4-P06N9-Z-*-SH

Mullite Porcelain Single tube, O.D. 11/16” (17.5 mm) 1/2” x 3/4” NPT steel fitting

6

24

24S4-P11F-*-SH

Mullite Porcelain Single tube, O.D. 11/16” (17.5 mm) 3/4” NPT steel nipple 2 1/2” long.

7

24

24S4-P11N-*-SH

* Add required thermocouple length. Multiples of 6” (152.4 mm) starting at 12” are in stock. .

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Phone: 617.527.4385 Fax: 617.964.3746 Email: sales@asrichards.com