1. Homepage
  2. Products
  3. Process sensors
  4. Flow sensors / flow meters
  5. Mechatronic sensors
  6. SBY334


Flow sensor with integrated backflow prevention


{{'OPTIONAL_INFO' | productAvailability | error}}

Dear customer,
Unfortunately, this data sheet is not available in the requested language. If you have any further questions, you can contact us by e-mail.

Best regards
Your ifm team

  • Precise detection of flow in pipes
  • Suitable for water, oils and glycol solutions
  • Reliable backflow prevention with very fast response time
  • Intuitive continuous adjustment of the switch point
  • Robust housing with very high pressure rating
  • ce
  • eac
  • cul
Technische Details
Product characteristics
Number of inputs and outputs Number of digital outputs: 1
Process connection Rp 3/4
Media Liquids; water; glycol solutions; oils; coolants
Medium temperature [°C] 0...85
Pressure rating [bar] 40
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] 2...50
Accuracy / deviations
Repeatability [% of the final value] 1
Hysteresis [l/min] 1...3
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 [K40] 476.5
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 3/4
Switching cycles mechanical 10 million
Displays / operating elements
switching status 4 x LED, yellow
Accessories (supplied)
Allen key
Caution Do not turn the cap beyond the maximum value of the setting range.
All data refer to water (20 °C).
Pack quantity 1 pcs.
Electrical connection
Connection Connector: 1 x M12
Diagrams and graphs
Pressure loss
dP Pressure loss
Q volumetric flow quantity
ifm electronic gmbh • Friedrichstraße 1 • 45128 Essen — We reserve the right to make technical alterations without prior notice. — EN-GB — SBY334-03 — 06.05.2015 —