Endress+Hauser iTHERM TM401, Technical Information

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iTHERM TM412
Hauser 31
Type Version
Dimensions Technical properties
D A B h P
max.
U
!D
!B
!A
h
A0021307
Type N 68 mm
(2.67 in)
165 mm
(6.5 in)
155 mm
(6.1 in)
24.5 mm
(0.96 in)

The VARINLINE ® housing connection flange is suitable for weld-in into the conical or torispherical head in tanks or containers with a small
diameter (≤ 1.6 m (5.25 ft)) and up to a wall thickness of 8 mm (0.31 in).
Type Technical properties
Varivent ® for VARINLINE ® housing for installation in pipes
U
!D
!i
!a
A0009564
• With 3-A symbol and
EHEDG certification
• ASME BPE compliance
Version
Dimensions
P
max.
D i a
Type N, according to DIN
11866, series C
68 mm (2.67 in)
OD 1½": 34.9 mm (1.37 in) OD 1½": 38.1 mm (1.5 in)
OD 1½" to OD 2½":
16 bar (232 psi)
OD 2": 47.2 mm (1.86 in) OD 2": 50.8 mm (2 in)
OD 2½": 60.2 mm (2.37 in) OD 2½": 63.5 mm (2.5 in)
Type N, according to DIN
11866, series C
68 mm (2.67 in)
OD 3": 73 mm (2.87 in) OD 3": 76.2 mm (3 in)
OD 3" to OD 4": 10 bar (145 psi)
OD 4": 97.6 mm (3.84 in) OD 4": 101.6 mm (4 in)
Type F, according to DIN
11866, series C
50 mm (1.97 in)
OD 1": 22.2 mm (0.87 in) OD 1": 25.4 mm (1 in)
16 bar (232 psi)
Due to the small immersion length U, the use of iTHERM QuickSens inserts is recommended.
Tip shape
The thermal response time, the reduction of the flow cross-section and the mechanical load that
occurs in the process are the criteria that matter when selecting the shape of the tip. Advantages of
using reduced thermometer tips:
• A smaller tip shape has less impact on the flow characteristics of the pipe carrying the medium.
• The flow characteristics are optimized, thereby increasing the stability of the protection tube.
• Hauser offers users a range of protection tube tips to meet every requirement:
– Straight tip
– Reduced tip with 4.76 mm (³⁄₁₆ in): walls of lower thickness significantly reduce the response
times of the overall measuring point