Endress+Hauser iTHERM TM401, Technical Information

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iTHERM TM412
24 Hauser
The iTHERM TS212 insert is available as a spare part. The insert length (IL) depends on the
immersion length of the protection tube (U), the length of the extension neck (E) and the length of
the protection tube shaft (T). The insertion length (IL) must be taken into consideration when
replacing the unit.
This can be calculated by means of the following formula: IL = U + T + E + 38.1 mm (1.5 in)
For more information on the deployed insert iTHERM TS212 with enhanced vibration
resistance and fast-response sensor, see the Technical Information.
Spare parts currently available for your product can be found online at:
http://www.products.endress.com/spareparts_consumables , product root: TM412. Always
quote the serial number of the device when ordering spare parts! The insertion length IL is
automatically calculated using the serial number.
Weight
Depending on the configuration
Material Extension neck and thermowell, insert, process connection.
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.
The maximum operating temperatures can be reduced considerably in cases where abnormal
conditions such as high mechanical load occur or in aggressive media.
Designation
Recommended max.
temperature for
continuous use in air
Properties
AISI 316L 650 °C (1 202 °F)
1)
• Austenitic, stainless steel
• 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
• The wetted part from a 316L or 1.4435+316L
thermowell withstand a passivation process with a
3% sulphuric acid
1) Can be used to a limited extent up to 800 °C (1472 °F) for low compressive loads and in non-corrosive
media. Contact your Hauser sales team for further information.
Surface roughness
Values for wetted surfaces:
1)
Standard surface R
a
≤ 0.76 µm (30 µin)
Finely honed surface
2)
R
a
≤ 0.38 µm (15 µin)
Finely honed surface and electropolished R
a
≤ 0.38 µm (15 µin)+ electropolished
1) Exception: Inside welding seams of the tee and elbow thermowells
2) Not compliant with ASME BPE
Terminal heads
All terminal heads have an internal shape and size in accordance with DIN EN 50446, flat face and a
thermometer connection with a ½" NPT or M24x1.5 thread. All dimensions in mm (in). The sample
cable glands in the diagrams correspond to M20x1.5 connections with non-Ex polyamide cable
glands. Specifications without head transmitter installed. For ambient temperatures with head
transmitter installed, see the 'Environment' section. →  18
As a special feature, Hauser offers terminal heads with optimized terminal accessibility for
easy installation and maintenance.