Head
and Well Assemblies
Industrial Protection Head Assembly Probes Inserted into Thermowells
NB1
/ 3-6 / 1/2-260S
 The
1/2" NPT mounting thread allows 1/4" OD industrial protection
head assemblies to be put directly into NEWPORT® thermowells
whose bore is 0.260" without having to use any additional
hardware. In this case, the probe length must be the
same as the element (stem) length of the desired thermowell.
When an extension assembly is desired, a type 3 extension
assembly can be inserted to separate the protection
head from the thermowell. In this case the probe length
would be the same as the element length (stem length)
of the desired thermowell plus the assembled extension
assembly length. |
Spring Loaded Assemblies
Using
spring loaded industrial protection head assemblies guarantees
a positive contact between the sensitive portion of the
temperature probe and the bottom of the thermowell, reducing
response time. See Section A for more information on spring
loading. NEWPORT also recommends the use of a thermally
conductive grease, such as our OT-201, to further aid in
reducing response time.
How To Order
Ordering an HWA assembly is easy. Simply follow
the part number format below:
Example: HWA / NB1-CASS-14G-12-TBSL /
3-6 / 1/2-260S-U41/2-304SS
NB1-CASS-14G-12-TBSL - $62
NB1 type thermocouple, type K, 304 SS sheath, 1/4" O.D.,
grounded junction, 12" length, with spring-loaded terminal
block. Thermocouples as well as RTD assemblies with a 1/4"
diameter can be used. Length should equal the stem (element)
length of the desired thermowell plus the assembled length
of the Type 3 extension assembly if any. (See thermowell
pages, for stem [element] lengths.)
3-6 - $8
Type 3 extension assembly; 6" long assembled. A Type
3 extension assembly is proper in this configuration. If
no extension assembly is needed, do not include the space
in the HWA part number.
1/2-260S-U41/2-304SS - $26.50
Standard threaded well for 1/4" element, 1/2" NPT thread,
4 1/2" insertion length, 304SS material. For a complete
listing of thermowells, see NEWPORT® thermowells individual
pages for details.
Total HWA assembly price - $96.50
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† All dollar amounts on this site are shown in US currency.
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Keywords: Head and Well Assemblies
Industrial Protection Head Assembly Probes Inserted into Thermowells
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