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IFM SBY357 Flow sensor with integrated backflow prevention


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SKU: SBY357 Categories: , , Tag:


  • Precise detection of flow in pipes
  • Suitable for water, oils and glycol solutions
  • Reliable backflow prevention with very fast response time
  • Intuitive continuous adjust
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Product characteristics
Number of inputs and outputs Number of digital outputs: 1
Process connection Rp 1 1/2
Media Liquids; water; glycol solutions; coolants
Medium temperature [°C] 0…85
Pressure rating [bar] 25
Pressure rating [Mpa] 2.5
Electrical data
Operating voltage [V] 10…30 DC; (to SELV/PELV)
Current consumption [mA] < 15
Protection class III
Reverse polarity protection yes
Inputs / outputs
Number of inputs and outputs Number of digital outputs: 1
Total number of outputs 1
Output signal switching signal
Electrical design PNP
Number of digital outputs 1
Output function normally open
Max. voltage drop switching output DC [V] 2.5
Permanent current rating of switching output DC [mA] 100
Short-circuit protection yes
Overload protection yes
Measuring/setting range
Setting range [l/min] 20…200
Accuracy / deviations
Repeatability [% of the final value] 1
Hysteresis [l/min] 5…10
Measuring error [% of the final value] ± 5
Response times
Response time [s] < 0.01
Operating conditions
Ambient temperature [°C] 0…60
Storage temperature [°C] -15…80
Protection IP 65; IP 67
Tests / approvals
DIN EN 61000-6-2
DIN EN 61000-6-3
Shock resistance
DIN EN 60068-2-27 20 g (11 ms)
Vibration resistance
DIN EN 60068-2-6 5 g (10…2000 Hz)
MTTF [years] 3318
Mechanical data
Weight [g] 1746.4
Materials brass chemically nickel-plated; PP; aluminium anodised; PA
Materials (wetted parts) stainless steel (1.4310 / 301); stainless steel (1.4301 / 304); PBT; brass chemically nickel-plated; PP; PPS; Polyolefin; O-ring: FKM
Process connection Rp 1 1/2
Switching cycles mechanical 10 million
Displays / operating elements
switching status 4 x LED, yellow
Items supplied
Allen key
Caution Do not turn the cap beyond the maximum value of the setting range.
All data refer to water (20 °C).
Notes Please note the changed housing design!
Pack quantity 1 pcs.
Electrical connection
Connection Connector: 1 x M12; coding: A
Diagrams and graphs
Pressure loss

dP Pressure loss
Q volumetric flow quantity

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