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IFM SU2020 Ultrasonic flow meter


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SKU: SU2020 Categories: , Tag:


  • Accurate flow measurement of ultrapure water and water
  • A robust, component-free measuring pipe made of stainless steel offers high media resistance and permanent ingress resistance
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Product characteristics
Process connection G 2 DN50 external thread
Special feature Gold-plated contacts
Media ultra-pure water; water; hydrous media
Note on media
hydrous media: for media with >10 % additives, the repeatability is the only available value
Medium temperature [°C] -20…100
Min. bursting pressure
150 bar 15 MPa
Pressure rating
100 bar 10 Mpa
Vacuum resistance [mbar] -1000
Electrical data
Operating voltage [V] 18…32 DC; (to SELV/PELV)
Current consumption [mA] < 75
Protection class III
Reverse polarity protection yes
Power-on delay time [s] 5
Measuring principle ultrasonic
Inputs counter reset
Total number of outputs 2
Output signal switching signal; pulse signal; analogue signal; IO-Link; frequency signal; diagnostic signal; totaliser switching signal
Electrical design PNP/NPN
Output function normally open / normally closed; (parameterisable)
Max. voltage drop switching output DC [V] 2
Permanent current rating of switching output DC [mA] 100
Switching frequency DC [Hz] 0…10000
Analogue current output [mA] 4…20
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
5…1000 l/min 300…60000 l/h 0.058…11.666 m/s 0.3…60 m³/h
Display range
-1200…1200 l/min -72000…72000 l/h -13.999…13.999 m/s -72…72 m³/h
0.1 l/min 1 l/h 0.001 m/s 0.002 m³/h
Set point SP
10.5…1000 l/min 630…60000 l/h 0.122…11.666 m/s 0.63…60 m³/h
Reset point rP
5.3…994.8 l/min 318…59688 l/h 0.062…11.605 m/s 0.318…59.688 m³/h
Analogue start point ASP
-1000…800 l/min -60000…48000 l/h -11.666…9.333 m/s -60…48 m³/h
Analogue end point AEP
-800…1000 l/min -48000…60000 l/h -9.333…11.666 m/s -48…60 m³/h
Low flow cut-off LFC
5…50 l/min 300…3000 l/h 0.058…0.583 m/s 0.3…3 m³/h
Frequency end point, FEP
200.6…1000 l/min 12037…60000 l/h 2.34…11.666 m/s 12.037…60 m³/h
Frequency at the end point FRP [Hz] 1…10000
Volumetric flow quantity monitoring
Pulse length [s] 0.002…2
Pulse value 0.1…99990000 I
Temperature monitoring
Measuring range [°C] -20…100
Display range [°C] -44…124
Resolution [°C] 0.1
Set point SP [°C] -19.6…100
Reset point rP [°C] -20…99.6
Analogue start point [°C] -20…76
Analogue end point [°C] 4…100
Frequency start point, FSP [°C] -20…76
Frequency end point, FEP [°C] 4…100
Frequency at the end point FRP [Hz] 1…10000
Accuracy / deviations
Flow monitoring
Accuracy (in the measuring range) ± (1,0 % MW + 0,5 % MEW)
Repeatability ± 0,2 % MEW
Temperature monitoring
Accuracy [K] ± 2,5 (Q > 5 % MEW)
Temperature coefficient [% of the span / 10 K] 0,2
Response times
Flow monitoring
Response time [s] < 0.25; (dAP = 0, T09)
Damping process value dAP [s] 0…5
Temperature monitoring
Dynamic response T05 / T09 [s] 5,7 / 86
Software / programming
Diagnostic functions direction of flow detection; signal quality
Communication interface IO-Link
Transmission type COM2 (38,4 kBaud)
IO-Link revision 1.1.3
SDCI standard IEC 61131-9: 2013-07
Profiles Identification and Diagnosis (0x4000)
Required master port type A
Process data analogue 3
Process data binary 2
Min. process cycle time [ms] 9.6
IO-Link process data (cyclical)
function bit length
totaliser 32
Flow monitoring 32
Temperature monitoring 32
status 4
Output 1 1
Output 2 1
Supported DeviceIDs
Type of operation DeviceID
Default 1461
Operating conditions
Ambient temperature [°C] -20…60
Storage temperature [°C] -25…80
Protection IP 67
Tests / approvals
DIN 61326-1:2021
Shock resistance
DIN IEC 68-2-27 20 g (11ms)
Vibration resistance
DIN IEC 68-2-6 5 g (10…2000Hz)
Pressure Equipment Directive can be used for group 2 fluids; group 1 fluids on request
Mechanical data
Weight [g] 1180
Type of mounting inlet pipe length 5xDN; outlet pipe length 1xDN
Materials housing: stainless steel (1.4404 / 316L); Display: PFA; Sealing Display: FKM; connector: POKAN
Materials (wetted parts) Pipe section: stainless steel (1.4404 / 316L); Process connection sealing: Centellen Flat seal
Process connection G 2 DN50 external thread
Surface characteristics Ra/Rz of the wetted parts 1.25 µm
Displays / operating elements
colour display 1,44″, 128 x 128 pixels
Switching function 2 x LED, yellow
diagnosis 1 x LED, three-colour
Items supplied
Flat seal 2, Centellen
package insert
MW = measured value
MEW = Final value of the measuring range
pulse and totaliser signal are only available for one of the two outputs
the accuracy indications are adhered to over the entire application area
Pack quantity 1 pcs.
Electrical connection
Connection Connector: 1 x M12; coding: A; Contacts: gold-plated
Diagrams and graphs
Note on pressure loss

derating ambient temperature

1 Ambient temperature
2 Medium temperature

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