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Functional Safety Manual
M310/FSM, Rev AA
January 2012
Horizontal Float Switch
LEVEL SWITCHES
CERTIFIED TO IEC 61508
Tables 9, 10, and 11 lists all of the Mobrey magnetic level switch options that are
certified to IEC 61508. In general, this is the entire range with the exception of the
marine versions, pneumatic switch mechanisms, and some floats.
Refer to Mobrey product data sheet IP101 for the full specifications.
Table 9. Level Switches for General Purpose Applications (Stainless Steel Wetside)
Model Product Description
S Switch
Flange (Head) Flange (Head)
36 Mobrey A
431 EN 1092-1 PN 16 (DN 125)
190 Mobrey A
417 EN 1092-1 DN 65 PN 40 (DN 65)
440 3 in. ASME B16.5 Class 150 RF
418 EN 1092-1 PN 40 (DN 80)
441 4 in. ASME B16.5 Class 150 RF
419 EN 1092-1 PN 40 (DN 100)
424 3 in. ASME B16.5 Class 300 RF
433 EN 1092-1 PN 40 (DN 125)
425 4 in. ASME B16.5 Class 300 RF
434 EN 1092-1 PN 40 (DN 150)
489 3 in. ASME B16.5 Class 600 RF
488 EN 1092-1 PN 63 (DN 80)
490 3 in. ASME B16.5 Class 900 RF
435 EN 1092-1 PN 63 (DN 100)
428 EN 1092-1 PN 16 (DN 65)
436 EN 1092-1 PN 63 (DN 125)
429 EN 1092-1 PN 16 (DN 80)
437 EN 1092-1 PN 63 (DN 150)
430 EN 1092-1 PN 16 (DN 100)
Switch Mechanism
D
Electrical: 2 independent Single Pole Single Throw (SPST) contact sets
P
As Type D but with gold plated contacts
D6
Electrical: 2 independent circuits of double pole changeover contact sets
P6
As Type D6 but with gold plated contacts
H6 As Type D6 but with gold plated contacts and hermetically sealed moving parts
B6 As Type H6 but approved for Zone 2 areas
Enclosure / Housing
A Aluminum alloy
Float
F84 General purpose e.g. high/low alarm, 316 SST
F93
Shrouded for dirty liquids, 316 SST
F96 General purpose e.g. high/low alarm, 316 SST
F98 General purpose e.g. high/low alarm, 316 SST
F104/+ Cranked arm: horizontal or vertical, 316 SST
F106 General purpose e.g. high/low alarm, 316 SST
F107 General purpose e.g. high/low alarm, 316 SST
Typical Model Number: S 36 D A / F84