Product and Ordering Information

Ceramic Protecting Tubes – Primary

With Double Threaded Bushing

Ceramic Protecting Tubes - Primary/Secondary 1 | Thermo Sensors

Tube Size*

I.D. x O.D.



Part Number
C30 CeramicC98 Ceramic
1/4″ x 3/8″3/4″ NPT C.S.C30 140F-(L)C98 140F-(L)
3/8″ x 1/2″3/4″ NPT C.S.C30 380F-(L)C98 380F-(L)
7/16″ x 11/16″3/4″ NPT C.S.C30 716F-(L)C98 716F-(L)
9/16″ x 3/4″3/4″ NPT C.S.C30 916F-(L)C98 916F-(L)
5/8″ x 7/8″1″ NPT C.S.C30 580F-(L)C98 580F-(L)
3/4″ x 1″1 1/4″ NPT C.S.C30 340F-(L)C98 340F-(L)


Without Fitting

Ceramic Protecting Tubes - Primary/Secondary 2 | Thermo Sensors

Tube Size*

I.D. x O.D.

Part Number
C30 CeramicC98 Ceramic
1/4″ x 3/8″C30 140-(L)C98 140-(L)
3/8″ x 1/2″C30 380-(L)C98 380-(L)
7/16″ x 11/16″C30 716-(L)C98 716-(L)
9/16″ x 3/4″C30 916-(L)C98 916-(L)
5/8″ x 7/8″C30 580-(L)C98 580-(L)
3/4″ x 1″C30 340-(L)C98 340-(L)

Ceramic Protecting Tubes - Primary/Secondary 3 | Thermo Sensors   Ceramic Protecting Tubes - Primary/Secondary 4 | Thermo Sensors   Ceramic Protecting Tubes - Primary/Secondary 5 | Thermo Sensors

Tube Size*

I.D. x O.D.

NPT**Style 1Style 2Style 3
C30 CeramicC98 CeramicC30 CeramicC98 CeramicC30 CeramicC98 Ceramic
1/4″ x 3/8″3/4″C30T140-(L)C98T140-(L)C30N140-(L)-(X)C98N140-(L)-(X)C30D140-(L)-(X)C98D140-(L)-(X)
7/16″ x 11/16″3/4″C30T716-(L)C98T716-(L)C30N716-(L)-(X)C98N716-(L)-(X)C30D716-(L)-(X)C98D716-(L)-(X)
9/16″ x 3/4″3/4″C30T916-(L)C98T916-(L)C30N916-(L)-(X)C98N916-(L)-(X)C30D916-(L)-(X)C98D916-(L)-(X)
5/8″ x 7/8″1″C30T580-(L)C98T580-(L)C30N580-(L)-(X)C98N580-(L)-(X)C30D580-(L)-(X)C98D580-(L)-(X)
3/4″ x 1″1 1/4″C30T340-(L)C98T340-(L)C30N340-(L)-(X)C98N340-(L)-(X)C30D340-(L)-(X)C98D340-(L)-(X)

* Other tube sizes and fittings are available on special order.

** Other thread sizes may be specified using the optional fitting table below.

Optional Fittings
Process ThreadMaterialMaximum Tube O.D.Option Code
1/2″ NPTCarbon Steel1/2″ O.D.4C
1/2″ NPTStainless Steel1/2″ O.D.4S
3/4″ NPTStainless Steel3/4″ O.D.6S
1″ NPTCarbon Steel1″ O.D.8C
1″ NPTStainless Steel1″ O.D.8S
1 1/4″ NPTCarbon Steel1 1/8″ O.D.10C
1 1/4″ NPTStainless Steel1 1/8″ O.D.10S
1 1/2″ NPTCarbon Steel1 1/2″ O.D.12C
1 1/2″ NPTStainless Steel1 1/2″ O.D.12S


Ceramic Protecting Tubes – Secondary

Ceramic Protecting Tubes - Primary/Secondary 6 | Thermo Sensors

MaterialI.D. x O.D.StylePart Number
Silicon Carbice1″ x 13/4″CollarSCT 100 WC-(L)
No CollarSCT 100 NC-(L)

How to Order

Select the tube size from the table and specify the part number shown for the desired material (C30 or C98), replacing the (L) and (X) with the required length in inches. If a fitting other than the standard thread is required, specify by adding the “option code” from the optional fitting table as a suffix to the part number.

C98 716F-18-8S
C30 916F-18-8C

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