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IFM SM4020 Magnetic-inductive flow meter


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SKU: SM4020 Categories: , , Tag:


  • Precise measurement of flow, consumption and medium temperature
  • High accuracy, repeatability and measurement dynamics
  • With switching output, analogue output and pulse outp
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Product characteristics
Number of inputs and outputs Number of digital outputs: 2; Number of analogue outputs: 1
Process connection G 1/4 DN6 flat seal
Special feature Gold-plated contacts
Media conductive liquids; water; hydrous media
Note on media
conductivity: ≥ 20 µS/cm
viscosity: < 70 mm²/s (40 °C)
Medium temperature [°C] -20…90
Pressure rating [bar] 16
Pressure rating [Mpa] 1.6
Electrical data
Operating voltage [V] 18…30 DC; (to SELV/PELV)
Current consumption [mA] < 80
Protection class III
Reverse polarity protection yes
Power-on delay time [s] 5
Inputs / outputs
Number of inputs and outputs Number of digital outputs: 2; Number of analogue outputs: 1
Inputs counter reset
Total number of outputs 2
Output signal switching signal; analogue signal; pulse signal; IO-Link; frequency signal; (configurable)
Electrical design PNP/NPN
Number of digital outputs 2
Output function normally open / normally closed; (parameterisable)
Max. voltage drop switching output DC [V] 2
Permanent current rating of switching output DC [mA] 100
Number of analogue outputs 1
Analogue current output [mA] 4…20; (scalable)
Max. load [Ω] 500
Pulse output flow rate meter
Short-circuit protection yes
Type of short-circuit protection pulsed
Overload protection yes
Measuring/setting range
Measuring range [ml/min] 5…5000
Display range [ml/min] -6000…6000
Resolution [ml/min] 1
Set point SP [ml/min] 33…5000
Reset point rP [ml/min] 7…4974
Analogue start point ASP [ml/min] 0…3993
Analogue end point AEP [ml/min] 1007…5000
Low flow cut-off LFC [ml/min] 5…250
Frequency end point, FEP [ml/min] 1005…5000
Frequency at the end point FRP [Hz] 1…10000
Volumetric flow quantity monitoring
Pulse length [s] 0.005…2
Pulse value 0.001…99990000 I
Temperature monitoring
Measuring range [°C] -20…90
Display range [°C] -42…112
Resolution [°C] 0.1
Set point SP [°C] -19.6…90
Reset point rP [°C] -20…89.6
Analogue start point [°C] -20…68
Analogue end point [°C] 2…90
In steps of [°C] 0.1
Accuracy / deviations
Flow monitoring
Accuracy (in the measuring range) ± (0,8 % MW + 0,2 % MEW)
Repeatability ± 0,2 % MEW
Temperature monitoring
Accuracy [K] ± 2,5 (Q > 1 l/min)
Response times
Flow monitoring
Start-up delay [s] 0…50
Response time [s] < 0.25; (dAP = 0, T09)
Damping process value dAP [s] 0…5
Temperature monitoring
Response time [s] 15; (Q > 1 l/min, T09)
Software / programming
Parameter setting options hysteresis / window; normally open / normally closed; switching logic; frequency output; current/pulse output; start-up delay; display can be deactivated; Display unit
Communication interface IO-Link
Transmission type COM2 (38,4 kBaud)
IO-Link revision 1.1
SDCI standard IEC 61131-9
Profiles Smart Sensor: Process Data Variable; Device Identification, Device Diagnosis
SIO mode yes
Required master port type A
Process data analogue 3
Process data binary 2
Min. process cycle time [ms] 6
Supported DeviceIDs
Type of operation DeviceID
Default 943
Operating conditions
Ambient temperature [°C] -20…60
Storage temperature [°C] -25…80
Protection IP 65; IP 67
Tests / approvals
DIN EN 60947-5-9
Shock resistance
DIN IEC 68-2-27 20 g (11 ms)
Vibration resistance
DIN IEC 68-2-6: 5 g (10…2000 Hz)
MTTF [years] 114
UL approval
UL Approval no. I014
File number UL E174189
Pressure Equipment Directive Sound engineering practice; can be used for group 2 fluids; group 1 fluids on request
Mechanical data
Weight [g] 712.8
Materials stainless steel (1.4408/316); stainless steel (1.4404 / 316L); PC; PBT+PC-GF30
Materials (wetted parts) stainless steel (1.4404 / 316L); PEEK; carbon fibre PEEK; FKM; Centellen
Process connection G 1/4 DN6 flat seal
Displays / operating elements
colour display 1,44″, 128 x 128 pixels
2 x LED, yellow
MW = measured value
MEW = Final value of the measuring range
Pack quantity 1 pcs.
Electrical connection
Connection Connector: 1 x M12; coding: A; Contacts: gold-plated
Diagrams and graphs

Pressure loss / volumetric flow quantity

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