Instruction Manual Supplement
D103283X012
249 Sensors
September 2017
Torque Tube Identification—Supplement to
™
Fisher
Identifying Torque Tubes for 249/259 Level Sensors
Use the following charts to identify 249/259 torque tubes. Refer to the appropriate 249 instruction manual for all
other sensor information.
1. To determine the type of sensor it can be used in... Level Sensor Family checked:
Measure length of tube, “L”,
(excluding pilot shaft)
249 Sensor Instruction Manuals
249BP
mm inches
259 249 249B
Short 293.1 11.54 X X X X X X
Long 397.8 15.66 X X
(CL150-
CL600)
249C 249CP 249K 249L
(obs)
249N
Short 293.1 11.54 X X X X
Long 397.8 15.66 X X X X
L
OD
249P
(CL150-
CL600)
European
Sourcing
Only
MATERIAL
CODE
249P
(CL900-
CL2500)
(obs)
249PT
(obs)
249V
M
249VS
WALL CODE
(obs)
249VT
249W
Indicates torque tube is rare, obsolete, or discontinued, and not commonly found.
www.Fisher.com
249 Sensors
Instruction Manual Supplement
September 2017
2. To determine “wall thickness”: Functions as “...wall” in the indicated Level Sensor Family:
a) Measure
Tube OD
mm inches
7.98 0.314 (none) HVY HVY HVY HVY STD STD
6.77 0.267 (none) STD STD STD STD HVY HVY THN THN
6.77 0.267 T THN THN THN THN STD STD
b) Look for wall
code on face of
outer
tube end
259 249 249B
249BP
(CL150-
CL600)
249C 249CP 249K 249L
D103283X012
3. To determine
material:
The most common
materials
Occasionally Used
Rare, obsolete, or
discontinued (might
be found in older
stock)
(obs)
249N
7.98 0.314 (none) STD HVY STD STD STD HVY
6.77 0.267 (none) THN STD THN HVY THN THN HVY STD
6.77 0.267 T THN STD STD THN
249P
(CL150-
CL600)
European
Sourcing
Only
249P
(CL900-
CL2500)
(obs)
249PT
(obs)
249V
249VS
(obs)
249VT
The stamped code only identifies the material of the end piece. This is the same as the tube material, except where noted.
Code on
rim of
outer end
M N04400 nickel alloy
S S31600 316 SST
I N06600 nickel alloy
C
D N08020
A S30400 304 SST
N N02200 nickel alloy
DN N03301 nickel alloy
Y N08800 nickel alloy
B N10665 nickel alloy
SC S30403 304L SST
H S31603 316L SST
L S34700 347 SST
Alloy Description Notes:
The tube itself is N05500 (which would be indicated by code “K” if stamped). The N05500 tube is
darker in color from the precipitation‐hardening treatment.
N10276
nickel alloy
249W
Indicates torque tube is rare, obsolete, or discontinued, and not commonly found.
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of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
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products at any time without notice.
Emerson Automation Solutions
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore
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2
E 2007, 2017 Fisher Controls International LLC. All rights reserved.
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