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TI00250T/09/EN/14.16
71343992
Products Solutions Services
Technical Information
Thermowell TA535
For general industrial applications and processes
generating medium to high stress
Thermowell for temperature inserts
Welded version with hexagonal extension and
threaded process connection
Application
The thermowell with a hexagonal extension is employed in industrial applications
which generate medium to high stress. For pipes or tanks that have threaded process
connections. It can accommodate sensors with a diameter of 6 mm (0.24 in) and can
also be used in combination with thermometers without a thermowell. It is available
with NPT, gas and M20 connections (on thermometer and process sides).
Your benefits
• Several types of process connection can be selected as standard
• Also large choice of outer diameters as standard
• Thermometer connection: ½" NPT, G ½" or M20x1.5 thread
• Thermowell made of SS 316L / 1.4404
• The immersion length can be selected to suit the process requirements, maximum
standard length 10 m (32.8 ft).
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Function and system design
1
2
3
4
L
1
2
3
4
Thermowell TA535
Equipment architecture
The TA535 is a straight thermowell (1) made from a welded tube. It
is perfect to accommodate temperature inserts (2) with a customary
diameter of 6 mm (0.25 in). The hexagonal extension is available in
several lengths and ends with a female thread (3), enabling the
thermowell to be connected to temperature inserts with an adjustable
compression fitting, for example, or thermometers with a matching
extension neck male thread (4).
A0032225
1 Thermowell design
Orientation
Installation instructions
Installation
No restrictions.
2 Mounting examples
2 Endress+Hauser
A0032231
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Thermowell TA535
The immersion length of the thermometer influences the accuracy. If the immersion length is too
small, errors in the measurement are caused by heat conduction via the process connection and the
container wall. For installation in a pipe, therefore, the recommended installation depth ideally
corresponds to half of the pipe diameter (see 1 and 2). Installation at an angle (see 3 and 4) could be
another solution. When determining the immersion length or installation depth all the parameters
of the thermometer and of the process to be measured must be taken into account (e.g. flow velocity,
process pressure).
• Installation possibilities: Pipes, tanks or other plant components
• Recommended minimum immersion depth = 80 to 100 mm (3.15 to 3.94 in)
The immersion depth should be at least 8 times the diameter of the thermowell.
Process
Process temperature range
Process pressure (static)
–200 to +650 °C (–328 to +1 202 °F)
Max. 100 bar (1 450 psi)
Permitted flow velocity depending on the immersion length
The maximum flow velocity tolerated by the thermowell diminishes with increasing thermowell
immersion length exposed to the stream of the fluid. In addition, it depends on the shape and size of
the thermowell, the medium type, process temperature and process pressure.
Thermowell sizing tool
It is possible to check the mechanical loading capacity as a function of the installation and
process conditions online in the TW Sizing Module for protection tubes in the Endress+Hauser
Applicator software. See https://wapps.endress.com/applicator
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Mechanical construction
T
L
ML
3 (0.12)
T
L
ML
!
!
TL
A
A
3 (0.12)
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Thermowell TA535
Design, dimensions
All dimensions in mm (in). Surface roughness Ra ≤ 1.6 µm (63 µin)
A0019038
1 Version with NPT connection thread
2 Version with G or M20 connection thread
A Thermometer connection
L Immersion length
ML Insertion length of insert
T Extension
TL Screw-in length 8 mm (0.32 in)
⌀ Thermowell outer diameter
Thermometer connectionAExtension T Immersion length L Thermowell outer diameter ⌀
Thread M20X1.5
Thread NPT ½"
Thread G ½"
Weight
Material
50 mm (1.97 in)
70 mm (2.76 in)
90 mm (3.54 in)
110 mm (4.33 in)
Other values up to a
maximum of
500 mm (19.7 in) can be
specified separately.
For correct temperature measurement, ensure that the tip of the insert touches the bottom of
the thermowell. To accurately determine the insertion length of the insert (ML), factor in the
type of connection on the thermometer used.
When using Endress+Hauser thermometers, the following lengths apply:
• Omnigrad S TMT162R, TMT162C, TR62, TC62: ML = (L+T) - 8 mm (0.32 in)
• Omnigrad S TR88, TC88: ML = (L+T)
Typical values, around 0.2 to 1 kg (0.44 to 2.2 lb) depending on the version and standard length.
The temperatures for continuous operation specified in the following table are only intended as
reference values for use of the various materials in air and without any significant compressive load.
50 to 5 000 mm (1.97 to 197 in)
10 to 10 000 mm (0.39 to 393.7 in) • 9 mm (0.35 in)
Internal diameter: 6.5 mm (0.26 in)
• 10 mm (0.39 in)
Internal diameter: 7 mm (0.28 in)
• 12 mm (0.47 in)
Internal diameter: 8 mm (0.32 in)
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Thermowell TA535
SW/
AF
T
L
T
L
TL
SW/
AF
TL
The maximum operating temperatures are reduced considerably in some cases where abnormal
conditions such as high mechanical load occur or in aggressive media.
Process connection
Description Short form Recommended max.
temperature for
continuous use in air
AISI 316L/
1.4404
Threaded connection Version Screw-in length TL in
Parallel (version M, G) Conical (version NPT) M M20x1.5 20 (0.79) 27
X2CrNiMo17-12-2 650 °C (1 202 °F) • Austenitic, stainless steel
G G ½"
NPT NPT ½" 8 (0.32) 27
Properties
• High corrosion resistance in general
• Particularly high corrosion-resistance in
chlorine-based and acidic, non-oxidizing
atmospheres through the addition of
molybdenum (e.g. phosphoric and sulfuric
acids, acetic and tartaric acids with a low
concentration)
• Increased resistance to intergranular corrosion
and pitting
Width across
mm (in)
G ¾" 30
NPT ¾" 8.5 (0.33)
flats (SW/AF)
A0032278
Seal
A process connection seal must be used for parallel threads (M20x1.5, G ½", G ¾").
Possible seal sizes:
• M20x1.5: seal 24x20.3x1.5 (copper)
• G ½": seal 26x21.3x1.5 (copper)
• G ¾": seal 32x27.3x2 (copper)
The material of the seal must be resistant to the process medium. The seal is not included in the
scope of supply.
Certificates and approvals
Material certification
The material certificate 3.1 (according to standard EN 10204) can be selected directly in the order
code. Other material-specific certificates can be requested separately. The "short form" certificate
includes a simplified declaration and has no enclosures of documents related to the materials used,
but guarantees the traceability of the materials through the identification number of the thermowell.
The data related to the origin of the materials can subsequently be requested by the client if
necessary.
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Thermowell TA535
Ordering information
Detailed ordering information is available from the following sources:
• In the Product Configurator on the Endress+Hauser website: www.endress.com -> Click "Corporate"
-> Select your country -> Click "Products" -> Select the product using the filters and search field ->
Open product page -> The "Configure" button to the right of the product image opens the Product
Configurator.
• From your Endress+Hauser Sales Center: www.addresses.endress.com
Product Configurator - the tool for individual product configuration
• Up-to-the-minute configuration data
• Depending on the device: Direct input of measuring point-specific information such as
measuring range or operating language
• Automatic verification of exclusion criteria
• Automatic creation of the order code and its breakdown in PDF or Excel output format
• Ability to order directly in the Endress+Hauser Online Shop
Accessories
Service-specific accessories
Accessories Description
Applicator Software for selecting and sizing Endress+Hauser measuring devices:
• Calculation of all the necessary data for identifying the optimum measuring
device: e.g. pressure loss, accuracy or process connections.
• Graphic illustration of the calculation results
Administration, documentation and access to all project-related data and
parameters over the entire life cycle of a project.
Applicator is available:
• Via the Internet: https://wapps.endress.com/applicator
• On CD-ROM for local PC installation.
Konfigurator
W@M Life cycle management for your plant
+temperature
Software for selecting and configuring the product depending on the measuring
task, supported by graphics. Includes a comprehensive knowledge database and
calculation tools:
• For temperature competence
• Quick and easy design and sizing of temperature measuring points
• Ideal measuring point design and sizing to suit the processes and needs of a wide
range of industries
The Konfigurator is available:
On request from your Endress+Hauser sales office on a CD-ROM for local PC
installation.
W@M supports you with a wide range of software applications over the entire
process: from planning and procurement, to the installation, commissioning and
operation of the measuring devices. All the relevant device information, such as
the device status, spare parts and device-specific documentation, is available for
every device over the entire life cycle.
The application already contains the data of your Endress+Hauser device. Endress
+Hauser also takes care of maintaining and updating the data records.
W@M is available:
• Via the Internet: www.endress.com/lifecyclemanagement
• On CD-ROM for local PC installation.
FieldCare FDT-based plant asset management tool from Endress+Hauser.
It can configure all smart field units in your system and helps you manage them. By
using the status information, it is also a simple but effective way of checking their
status and condition.
For details, see Operating Instructions BA00027S and BA00059S
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Thermowell TA535
Supplementary documentation
Technical Information:
• RTD thermometer, Omnigrad S field transmitter TMT162R (TI00266T/02)
• TC thermometer, Omnigrad S field transmitter TMT162C (TI00267T/02)
• Omnigrad S: TR62 modular thermometer with resistance insert (RTD), TC62 modular
thermometer with thermocouple insert (TC) (TI01024T/09)
• Omnigrad S: TR88 with resistance insert (RTD), TC88 with thermocouple insert (TC) - Extension
neck and threaded connection for installation in an existing thermowell (TI01098T/09)
Endress+Hauser 7
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