Manu
Flo
Page 6
MANU ELECTRONICS
PTY LTD
Flow Measurement Products
41 Carter Road, Brookvale NSW 2100
Website:
http://www.manuelectronics.com.au
RPFS_Datasheet 23/02/2018
RPFS
ROTA PULSE FLOW SENSOR
(Slip Insertion Paddlewheel)
DATASHEET
FEATURES
± 2.5% accuracy @ velocity range 0.5 to 8.5 m/sec.
± 1 % accuracy over linear range 0.7 to 7.0 m/sec.
Repeatability of ±0.6%.
NPN inductive pulse with internal amplification.
Square wave output with short circuit protection.
Inductive coil pulse option for low current applications.
High Pressure options to 2000kpa
50
C or 120
C temperature models.
Simple installation and maintenance.
Large range of pipe adapter fittings in sizes 20 to 110mm.
(Larger pipe sizes to 500mm using “Long Stem” –LS version)
Stainless Steel 17-4PH paddlewheel rotor without magnets.
Australian made since 1984.
(Now with new high speed bush option).
DESCRIPTION
The Rota Pulse Flow Sensor (RPFS) paddlewheel insertion type flowmeter uses a proven
principle of flow measurement, which is used worldwide. The RPFS comes in four model
variants:
RPFS-P
for liquids up to 50
C (plug-in cable)
RPFS-H
for liquids up to 120
C
RPFS-P
All model variants insert directly into a large range of pipe adapter fittings available in PVC, Galvanized Iron, Brass, Stainless
Steel or Polypipe materials, covering pipe sizes 20 to 110mm (standard sizes). This makes the RPFS suitable for a wide range of
liquid flow measurement, monitoring and batching applications. Using the BSPB & BSPSS fittings adaption to larger size pipes is
possible depending on pipe wall thickness, alternatively the Long Stem (-LS) versions with adaptors are then used.
With only one moving part and limited intrusion into the pipe, and combined with its flow-through design, the RPFS allows
accurate measurement of liquid flows with virtually no head losses.
Each of the 4 blades of the rotor (paddlewheel) extends approximately one centimetre into the flowing liquid. The RPFS-P sensor
generates a square wave pulse with the frequency output proportional to flow velocity and proportional to pipe diameter. The
RPFS-P incorporates internal amplification, allowing pulse transmission up to 1000 metres to the receiver device. The RPFS-P
model is specially constructed with a metal shielding jacket making it immune to electrical interference.
Magnets are not used in the RPFS models, thereby eliminating iron particles jamming the rotor. The alloy rotor used also makes
the RPFS less susceptible to interference from turbulence and particles hitting the rotor, thereby giving superior flow results.
SPECIFICATIONS
Model
RPFS-P
RPFS-H
Supply voltage
5-30VDC
5-30VDC
Output signal
NPN open collector
NPN open collector
50% duty cycle pulse
50% duty cycle pulse
Current draw @ 5VDC / 24VDC
2.5mA / 10mA
2.5mA / 10mA
Max. switching current
200 Ma (at 24VDC)
200 mA (at 24VDC)
Cable length
5 metres, plug-in cable 2 metres cable
3-core (3 wire)
2-core shielded (3 wire)
Fluid temperature
50 °C max.
120 °C max.
Weather rating
IP67
IP65
Pressure rating
200psi
400psi
Accuracy
± 2.5% for 0.5 to 8.5 m/s, ±1% for 0.7 to 7.0 m/s, Repeatability ± 0.6%
For Pipe Sizes
15 to 110mm standard,
Larger pipes via BSPB-LS special adaptor or saddle clamps.
