Endress+Hauser M TW15 Specifications
TI00265T/02/EN/14.13
71226885
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Technical Information
Thermowell
Omnigrad M TW15
Heavy duty - General purpose
Weld-in or flanged process connection
Application
TW15 is designed for use with resistance and thermocouple thermometers in heavy
duty applications.
Modular configuration according to DIN 43772 (form 4/4F) enable a use in all
industrial processes with severe thermal and mechanical stresses.
Your benefits
• TW15 is a barstock thermowell.
• The process connection can either be weld-in or flanged.
• Extension, immersion length and total length can be chosen according to process
requirements.
• A wide choice of dimensions, materials and process connections is available.
• Special versions can be manufactured according to customer requirements.
Equipment architecture
TW15
Function and system design
A0017835
Equipment architecture of the Omnigrad M TW15
The Omnigrad M TW15 thermowells are designed according to DIN 43772 and can therefore
guarantee a good level of resistance to the most typical and common industrial processes. The
thermowell is made from a metal bar with a diameter of 18, 24 or 26 mm (0.71, 0.94 or 1.02 in). The
end of the thermowell is conical with a tip diameter of 9 or 12.5 mm (0.35 or 0.49 in). As process
connection the TW15 offers weld-in or different flanged versions.
2 Endress+Hauser
TW15
0
5
10
15
20
25
30
35
40
45
100 200 300 400
v (m/s)
A
B
0
4 8 12 16
0
15
30
50
65
80
100
115
130
145
v (ft/s)
U1 (mm)
U1 (in)
50
165
160
0
5
10
15
20
25
30
35
40
45
100 200 300 400
v (m/s)
0
4 8 12 16
0
15
30
50
65
80
100
115
130
145
v (ft/s)
U1 (mm)
U1 (in)
Performance characteristics
Operating conditions Process pressure (static)
Process connection Standard Max. process pressure
Weld-in version - ≤ 400 bar (5800 psi)
Flange EN1092-1 or ISO 7005-1 20, 40 or 50 bar depending on the
Permitted flow velocity depending on the immersion length
The highest flow velocity tolerated by the thermometer diminishes with increasing immersion length
exposed to the stream of the fluid. In addition it is dependent on the geometry of the thermometer, the
process medium, the process temperature and the process pressure. The following figures exemplify
the maximum permitted flow velocities in water and superheated steam at a process pressure of 5 MPa
(50 bar = 725 PSI).
flange pressure rating PNxx
ANSI B16.5 Depending on the flange pressure
rating 150 or 300 psi
JIS B 2220 Depending on the flange pressure
rating 20K, 25K or 40K
Thermowell with D = 18 mm (0.71 in), U = 65 mm (2.56 in) -----------Thermowell with D = 24 mm (0.94 in), U = 125 mm (4.9 in) - - - - - -
Endress+Hauser 3
A Medium water at T = 50 °C (122 °F) U1 Immersion length thermowell, material 1.4571
B Medium superheated steam at T = 400 °C (752 °F) v Flow velocity
(316Ti)
A0011123
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