Endress+Hauser TA535 Specifications
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).
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
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
Endress+Hauser 3
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