Data Sheet

Level Instruments
D103219X012
Product Bulletin
11.2:Level
February 2015
9
Table 5. Fisher 249 Sensors Displacer Lengths
Sensor Type Number
Standard Displacer Length
mm Inches
Caged Displacers
356 or 813 14 or 32
249
249B, 249C, 249BF, 249K, 249L
356, 813, 1219, 1524, 1829,
2134, 2438, 2743, 3048
14, 32, 48, 60, 72, 84,
96, 108, 120
Top‐Mounted Cageless Sensors
249BP, 249CP, 249P
Side‐Mounted Cageless Sensors
249VS
Top‐Mounted or on Customer Supplied Cage
249W
Table 6. Fisher 249 Sensor Construction Materials
Part Type Number Material Notes
Cage, head,
torque tube arm
249 Cast iron
For optional materials, and parts not shown,
contact your Emerson Process Management
sales office.
249B, 249BF, and 249BP Carbon steel
249C and 249CP CF8M (316 stainless steel)
249K Steel standard
249L Steel standard
249P Carbon Steel
249VS LCC (steel), WCC (steel), CF8M
Wafer body,
torque tube arm
249W NPS 3
NPS 4
WCC, CF8M
LCC, CF8M
Standard Trim
(1)
All S31600
Bolting All Steel grade B7 studs or cap screws
and grade 2H nuts (standard),
1. Trim parts include displacer rod, driver bearing; displacer stem parts, and stem connection parts.
Table 7. Fisher 249 Displacer and Torque Tube Materials
Part Standard Material Other Materials
Displacer
304 Stainless Steel
316 Stainless Steel for 249C, 249CP
316 Stainless Steel, N10276, N04400,
Plastic, and Special Alloys
Displacer Stem,
Driver Bearing,
Displacer Rod and Driver
316 Stainless Steel
N10276, N04400, other Austenitic Stainless
Steels, and Special Alloys
Torque Tube
N05500
(1)
316 SST for 249C, 249CP
316 Stainless Steels, N06600, N10276
1. N05500 is not recommended for spring applications above 232_C (450_F). Contact your Emerson Process Management sales office or application engineer if temperatures exceeding this
limit are required.
Table 8. Maximum Unbuoyed Displacer Weight
Sensor Type Torque Tube Wall Thickness Displacer Weight W
T
(lb)
249, 249B, 249BF, 249BP, 249W
Thin
Standard
Heavy
3.3
5.0
9.5
249C, 249CP
Standard
Heavy
4.0
6.4
249VS
Thin
Standard
3.0
5.5
249L, 249P
(1)
Thin
Standard
4.5
8.5
249K
Thin
Standard
3.8
7.3
1. High pressure CL900 through 2500.