Datasheet

FLOW SWITCHES
66
FLOW
SWITCHES
www.gems-sensors.co.uk
ROTOR & TURBINE
RotorFlow - RFO and RFA Types
Body Port Flow Ranges (l/min) Output (Hz) RFO RFA
Material Size Low Range* Standard Range Approximate BSP NPT
1/4" 0.4 to 4.0 (±7%) 2.0 to 20.0 (±7%) 15-180
155421BSPP 155421
Polypropylene
1/2" 6.0 to 45.0 (±7%) 15.0 to 75.0 (±15%) 20-190 155481BSPP 155481
1/4" 0.4 to 4.0 (±7%) 2.0 to 20.0 (±7%) 15-180 156261BSPP 156261
Brass 1/2" 6.0 to 45.0 (±7%) 15.0 to 75.0 (±15%) 20-190 156262BSPP 156262
3/4" - - - 20 to 112.5 (±15%) 25-210 194761BSPP 194761
1" - - - 30 to 225 (±15%) 15-180 194762BSPP 194762
9/16 - 18 UNF 0.4 to 4 (±7%) 2 to 20.0 (±7%) 15-180 N/A 165071
1/2" 6 to 45 (±7%) 15.0 to 75.0 (±15%) 20-190 165075BSPP 165075
Stainless Steel 3/4" - - - 20 to 112.5 (±15%) 25-210 194763BSPP 194763
1" - - - 30 to 225 (±15%) 15-180 194764BSPP 194764
Hall-Effect-Sensor sends a voltage pulse with
each pass of magnetic field
Output signal for RFO Types is an on/off pulse of the DC
voltage supplied to the unit, it is compatible with all digital
logic families. Input voltage range is 4.5 to 24 Vd.c.
Frequency of the output pulse is proportional to the
flow rate and ranges from approximately 25 Hz at
low flow to 225 Hz at high flow. See order number
for more information.
Following examples are at 12Vdc supply
Low Flow
HighFlow
* With use of Low-Flow-Adapter supplied.
See page 70 for more information.
For dimensions see page RFS
Please consult factory for detailed flow
rate / frequency curves.
+VDC
12Vdc
0
+VDC
12Vdc
0
Wetted materials
Body Polypropylene (Hydrolytically Stable, Glass
Reinforced),
Stainless Steel or Brass
Rotor pin Ceramic
Rotor Ryton Composite, Colour: Black
Lens Polysulfone
O-Ring Buna N (Metal body = Viton)
Max. operating pressure Polypropylene Body: 7 bar
Metal Body: 14 bar
Max. operating temperature Polypropylene Body: 80 °C
Metal: 100 °C
Electronics (both bodies) 65 °C Ambient
Max. viscosity 45 cSt
Input power 4.5 to 24 Vdc, (24Vdc Regulated Supply for RFA
models)
Output signal 4.5 to 24 Vdc Pulse, Pulse Rate dependent on Flow
Rate,
Port Size and Range
0 to 10 V, available (RFA model), consult Sales
Office
Max. current source output 70 mA
Frequency output range 25 Hz (Low Flow) to 225 Hz (High Flow)
Electrical termination AWG 22 PVC-Jacketed Cable, Length 60 cm
Colour Code: Red = + Vdc, Black = Ground,
White = Signal output
Typical pressure drop See Graphs
Specifications
How to Order
Signal Output
4.5 - 24 VDC Pulsed Output - RFO
0 - 10 V, RFA
Gems Sensors popularised the Rotor-Flow’s paddlewheel design by combining high
visibility rotors with solid-state electronics that are packaged into compact, panel
mounting housings. They provide accurate flow rate output with integral visual
confirmation ... all with an unprecedented price/performance ratio.
* With use of Low-Flow-Adaptor supplied
High Resolution Black Rotor
Ryton composite. Each of the six rotor arms are magnetized.
T
T
Standard Products in bold
Consult
Factory
Consult
Factory
Consult
Factory