The SFAH flow sensor combines high flow dynamics with a compact design and has been developed to measure non-corrosive gases and air. It is designed for use in the general automation market, particularly for small parts picking applications, consumption monitoring, air gap checking and leakage detection.

The SFAH flow sensor has an intuitive user interface with high output flexibility. It also has a high level of in-built flexibility thanks to switchable electrical outputs – including NPN/PNP, NO/NC and IO-Link. Equipped with digital and analogue outputs, it can be programmed directly via ‘teach’ buttons on the unit, or by using an IO-link master and selecting parameters via a computer or PLC.

The SFAH flow sensor is IP40 rated for use in general industrial applications and a range of accessories is available to protect the sensor in harsher environments.

Technical data
Permission RCM mark
CE certificate (see declaration of conformity) acc. to EU-EMV Directive acc. to EU-RoHS Directive
KC-mark KC-EMV
Material information RoHs compliant
Measured parameter Mass flow Volume flow rate
Flow direction Uni-directional
Measurement principle Thermic
Measurement process Heat Transfer
Flow measurement range starting value [l/min] 0,200
Flow measurement range end value [l/min] 10,0
Operating pressure [bar] -0.9 to 10
Operating medium Druckluft nach ISO 8573-1:2010 [6:4:4] Stickstoff Argon
Medium temperature [°C] 0 to 50
ambient temperature [°C] 0 to 50
Nominal temperature [°C] 23
Accuracy flow value ± (2% o.m.v. + 1% FS)
Repeatability null point in ± %FS [] 0,2
Repeatability clamp in ± %FS [] 0,8
Temperature coefficient clamp in ± %FS/K type 0,15%FS/K
Pressure dependency clamp in ± %FS/bar [] 1
Control output 2 x PNP or 2 x NPN switchable
Switch function Window comparator Threshold comparator Auto difference monitoring
Switching element function Opener/closer switchable
Max. output current [mA] 100
Analogue output 0 - 10 V 4 - 20 mA 1 - 5 V
Flow characteristic curve starting value [l/min] 0
Flow characteristic curve end value [l/min] 10,0
Max. load resistance current output [Ohm] 500
Min. load resistance voltage output [Kilo-Ohm] 20
Short circuit resistance yes
Overload resistant Available
Report IO-Link
IO-Link, report Device V 1.1
IO-Link, profile Smart sensor profile
IO-Link, function classes Teach channel Diagnosis Identification Binary data channel (BDC) Process data variables (PDV)
IO-Link, communication mode COM2 (38.4 kBaud)
IO-Link, SIO mode support yes
IO-Link, port type A
IO-Link, process data width IN 3 Bytes
IO-Link, process data contents IN 1 bit BDC (Volume monitoring) 14 bit PDV (Flow measurement) 2 bit BDC (Flow monitoring)
IO-Link, service data unit IN 32 bit PDV (volume measurement)
IO-Link, minimum cycle time 4 ms
IO-Link, data memory needed [Byte] < 0,5 kB
Operating voltage range DC [V] 22 to 26
Empty run current [mA] <= 25 mA
Reverse polarity protection for all electrical connections
Electrical connection 1, connection type Plug
Electrical connection 1, connection technology M8x1, A coded to EN 61076-2-104
Electrical connection 1, number of pins / wires 4
Fastening type With Accessories
installation position arbitrary
Pneumatic connection For hose exterior diameter 6 mm
Pneumatic connection, connection outlet straight
Product weight [g] 60
Housing material PA reinforced
From medium contacting materials NBR high-alloyed stainless steel PA reinforced Alu wrought alloy, anodised Epoxy resin Silicon Silicon nitride
Display type Illuminating LCD Multiple
Presentable unit(s) g g/min l l/h l/min scft scft/h scft/min
Setting options IO-Link Teach-In über Display und Tasten/td>
Tamper-proof fuse IO-Link PIN code
Protection category IP40
Pressure drop [mbar] < 5 mbar
Protection class III
Corrosion resistant class KBK 2 - moderate corrosion stress

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