The paddlewheel rotors used in the Signet 515 paddlewheel flow sensor and those used in the Signet 2536 Low-flow sensor are virtually identical in appearance, but they are not interchangeable. This can lead to confusion and service issues if the user is not conscious of the differences.
There are three basic distinctions between the two types of rotors. Two of these may not always be useful. The third is a positive method that can always be used.
515 Rotors:
• Larger magnets (Magnets are visible
in natural PVDF rotors only.)
• Heavier weight
• Molded circle at each end has a center
diameter line.
Order Number
Code
Description
M1538-2
198 801 181
Rotor, PVDF Black
P51547-3
159 000 474
Rotor, PVDF Natural
M1538-4
198 820 018
Rotor, Tefzel®
P51550-3
198 820 043
Rotor and Pin, PVDF Natural
3-0515.322-1
198 820 059
Sleeved Rotor, PVDF Black
3-0515.322-2
198 820 060
Sleeved Rotor, PVDF Natural
3-0515.322-3
198 820 017
Sleeved Rotor, Tefzel®
2536 Rotors:
• Smaller magnets (Magnets are visible
in natural PVDF rotors only.)
• Lighter weight
• Molded circle at each end has no
diameter line.
