Name: SMF421
Brand: ifm
SKU: SMF421
Price: 4990.90 AUD

Product characteristics

Measuring range

10...1200 l/min

600...72000 l/h

2.6...317 gpm

0.28...33.42 ft/s

Nominal diameter

DN50 (2“)

Process connection

ifm-specific device flange

Application

Special feature

Gold-plated contacts

Application

food and beverage industry

Media

conductive liquids; water; hydrous media

Note on media

food products such as beer, milk, fruit juices, soft drinks, ketchup, yoghurt, yoghurt toppings, ice cream

conductivity: ≥ 5 µS/cm

Medium temperature [°C]

-20...150

Medium temperature [°F]

-4...302

Min. bursting pressure

543.75 psi

3.75 MPa

Pressure rating

362.5 psi

2.5 MPa

Electrical data

Operating voltage [V]	18...32 DC
Current consumption [mA]	250; (24V)
Protection class	III
Reverse polarity protection	yes
Power-on delay time [s]	< 5
Measuring principle	magnetic-inductive

Inputs / outputs

Total number of inputs and outputs	2

Inputs

OUT2	external totaliser reset

Outputs

Total number of outputs

2

Output signal

OUT1	pulse signal; totaliser switching signal; diagnostic signal; IO-Link
OUT2	analogue signal; pulse signal; totaliser switching signal; diagnostic signal

Electrical design

PNP/NPN

Pulse output

flow rate meter

Short-circuit protection

yes

Type of short-circuit protection

pulsed

Overload protection

yes

Analogue

Number of analogue outputs	1
Analogue current output [mA]	4...20; (skalierbar)
Max. load [Ω]	500
Resolution of analogue output	0.38 µA

Digital

Number of digital outputs	2
Max. voltage drop switching output DC [V]	2
Permanent current rating of switching output DC [mA]	100
Switching frequency DC [Hz]	0...10000

Measuring/setting range

Measuring range

10...1200 l/min

600...72000 l/h

2.6...317 gpm

0.28...33.42 ft/s

Display range

-1440...1440 l/min

-86400...86400 l/h

-380.41...380.41 gpm

-39.4...39.4 ft/s

Resolution

0.1 l/min

50 l/h

0.01 gpm

0.01 ft/s

Note on factory setting

0…80 gpm

Analogue start point ASP

0...960 l/min

0...57600 l/h

0...253.63 gpm

0...26.24 ft/s

Analogue end point AEP

240...1200 l/min

14400...72000 l/h

63.41...317.04 gpm

6.56...32.8 ft/s

Low flow cut-off LFC

0...960 l/min

0...57600 l/h

0...253.63 gpm

0...26.24 ft/s

Pulse length [s]

0.002...2

Pulse value

0.002...99990000 I

Temperature monitoring

Measuring range [°C]	-20...150
Measuring range [°F]	-4...302
Display range [°C]	-20...150
Display range [°F]	-4...302
Resolution [°C]	0.01
Resolution [°F]	0.1
Analogue start point [°C]	-20...116
Analogue start point [°F]	-4...240.8
Analogue end point [°C]	14...150
Analogue end point [°F]	57.2...302

Conductivity monitoring

Measuring range [µS/cm]	100...100000
Display range [µS/cm]	0...10000000
Resolution [µS/cm]	1
Analogue start point [µS/cm]	0...80000
Analogue end point [µS/cm]	20000...100000

Accuracy / deviations

Volumetric flow monitoring

Accuracy (in the measuring range)

with optional factory calibration (available from 2025)	± (0,2 % MW + 2 mm/s)
standard	± (0,5 % MW + 1,5 mm/s)

Repeatability

0,1% MW

Temperature monitoring

Accuracy [K]	± 1
Repeatability [K]	± 0,5

Conductivity monitoring

Accuracy (in the measuring range)

in the range of 100...20000 µS/cm	±10% MW
in the range of 20000...100000 µS/cm	±20% MW

Repeatability

± 5% MW

Response times

Volumetric flow monitoring

Response time [s]	< 0.3
Damping process value dAP [s]	0...5

Temperature monitoring

Response time [s]	< 3; (flow velocity: ≥ 0,5m/s)

Conductivity monitoring

Response time [s]	< 2

Software / programming

Diagnostic functions	direction of flow detection; liquid detection

Interfaces

Communication interface

IO-Link

Transmission type

COM3 (230,4 kBaud)

IO-Link revision

1.1.3

SDCI standard

IEC 61131-9

Profiles

Function class	Designation
0x4000	Identification and Diagnosis
0x001B	Measuring and Switching Sensor, floating point, 4 channel

SIO mode

yes

Required master port type

A

Process data analogue

6

Process data binary

8

Min. process cycle time [ms]

1.9

IO-Link process data (cyclical)

function	bit length
totaliser	32
flow	32
temperature	32
conductivity	32
status	4
binary switching information	8

IO-Link functions (acyclical)

direction of flow detection; totaliser; Speicher; operating hours counter; internal temperature; simulation function

Operating conditions

Ambient temperature [°C]	-20...65
Ambient temperature [°F]	-4...149
Storage temperature [°C]	-20...80
Storage temperature [°F]	-4...176
Protection	IP 67; IP 69

Tests / approvals

EMC

DIN 61326-1

Shock resistance

DIN IEC 68-2-27

20 g (18ms)

Vibration resistance

DIN IEC 68-2-6

5 g (10...2000Hz)

MTTF [years]

81

Pressure Equipment Directive

Sound engineering practice; can be used for group 2 fluids; group 1 fluids on request

Mechanical data

Weight [g]	5815.1
Inlet pipe length	5 x DN
Outlet pipe length	2 x DN
Materials	housing: stainless steel (316L/1.4404); flange: stainless steel (304/1.4301); electronics fixture: stainless steel (304/1.4301); electronics: stainless steel (316L/1.4404); Display: polysulfane; Display-Sealing: FKM; LED ring: PP
Materials (wetted parts)	Pipe section: PFA; electrodes: stainless steel (316L/1.4435)
Nominal diameter	DN50 (2“)
Process connection	ifm-specific device flange
Surface characteristics Ra/Rz of the wetted parts	≤ 0.4 μm

Displays / operating elements

Factory setting

gpm; °F; μS/cm

Display

process value	full graphics TFT display, multi-colour 3,5" 320 x 240 Pixel
	display layouts: 4
	display rotation: 4 x 90°
operating status	LED ring, three-colour

Display unit

l/min; l/h; hl/min; hl/h; m³/min; m³/h; m/s; gpm; gph; ft/s; °C; °F; μS/cm; S/m; ms/cm

Language

German; English; Spanish; French; Italian; Japanese; Korean; Portuguese; Chinese

Operating elements

4	capacitive pushbuttons

Remarks

MW = measured value

MEW = Final value of the measuring range

pulse and totaliser signal are only available for one of the two outputs

reference conditions : water , 15...35 °C, inlet pipe length: 10 x DN, outlet pipe length: 5 x DN

Pack quantity

1 pcs.

Electrical connection

Connection	Connector: 1 x M12; coding: A; Contacts: gold-plated