1
SENSOR CONSTRUCTION
RPFS
Model
RPFS-P
RPFS-H
Body
Delron (Acetal)
Brass
O-rings x 2
Neoprene
Viton
Rotor
Stainless Steel 17-4PH
Bushes
Delron
Axle
Tungsten Carbide
Lockcap
PVDF
Brass
Dimensions
Overall (approx.)
130L x 30W mm 150L x 30W mm
ORDERING CODES:-
NOTE: All RPFS sensors are supplied with a screw-down LC locking cap
Item
Description
RPFS-P
NPN transistor 5-25VDC sinking pulse,
liquid temperature to 50
C
RPFS-H
NPN transistor 5-25VDC sinking pulse,
liquid temperature to 120
C
SPARE PARTS
PW-N Spare wheel
PWAH Axle
PC5 5 mtr m12 lead
LC Locking Cap
BS020 Orings
MAINTENANCE
RPFS
Recommended Periodic Checks:
With clean liquids, sensor check of the paddle wheel is recommended once every year. In applications with reclaimed or
contaminated fluids, regular quarterly maintenance checks are recommended.
Removal of RPFS from Pipe adaptor Fitting
‘Square’
Keyway Type Nipple Adaptor:
(see FIG 5)
1 - Unscrew the black PVC locking cap (anti-clockwise).
2 - Place a small to medium sized flat thin bladed screwdriver in the join where the insertion sensor body meets the nipple
adaptor (See FIG 4), twist the screw driver to prize the two apart till the slots clear the keyways, then pull or twist upwards
until the sensor is released (never pull via the cable).
Removal of RPFS from Pipe adaptor Fitting
‘Triangular’
Keyway Type Nipple Adaptor:
(see FIG 6)
1 - Unscrew the black PVC locking cap (anti-clockwise).
2 - Hold the neck of the Tee piece in your left hand, grasp the RPFS body with your right hand and turn slowly anti-clockwise
until the sensor hydraulically raises out of slot then pull upwards out of the socket (never by the cable).
**When returning the sensor to nipple adaptor insert so the keyway and slots line up then then push down until they locate.
Screw the black locking cap clockwise to hold the sensor in place (hand tightened only).
Cleaning:
1 - If the paddlewheel (rotor) and or sensor body is coated with scale, immerse the sensor section in diluted hydrochloric acid,
scour gently if required.
2 -
For ease of removal or refitting of sensor we strongly recommend to lubricate the body O-rings using petroleum jelly.
3 - If the paddlewheel requires servicing, push out the axle using a small hole punch or similar implement, remove the
paddle wheel and service or replace rotor and/or axle as required (spare parts available from ManuFlo).
Fault Diagnosis & Rectification:
If the RPFS sensor ceases to count, the paddlewheel may be blocked, remove inspect and clean as described above.
If the RPFS pulses when there is no flow, a nearby 50Hz AC field is probably causing these false counts. Move the flow sensor
away from the 50Hz field, or move the source of the field if practical.
If the standard cable length supplied is not sufficient and needs extending contact ManuFlo for suitable ‘screened’ cable and
never run extended cable across or near to other cables that are potential EMF sources.
