Levitronix LEVIFLOW LFS-SU User manual

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
First Release: 11-Dec-2014
Last Update: 07-Oct-2021
LEVIFLOW®LFS-SU
SINGLE-USE FLOWMETERS
USER MANUAL
LEVIFLOW®Single-Use Sensors: LFS-03SU, -06SU, -10SU, -15SU, -20SU
LEVIFLOW®Converter: LFC-1C-PC, LFC-6CIO-PC (6-Channel)
This manual contains information necessary for the safe and proper use of the LEVIFLOW®LFS-SU single-use
flowmeter series. Included are specifications for the standard configuration, components, and instructions regarding its
use, installation, operation, adjustment, inspection and maintenance. For special configuration of the LEVIFLOW®
flowmeters refer to accompanying information. If the flowmeters shall be configured for other parameter settings, then
the Levitronix®Service Software (see relevant manual Levitronix

Doc.# PL-4048-00) is necessary. For the multi-
channel converter LFC-6CIO-PC the Levitronix®Service Software version V2.0.5.0 or higher is needed.Please
familiarize yourself with the contents of this manual to ensure the safe and effective use of this product. After reading,
please store the manual where the personnel responsible for operating can readily refer to it at any time.

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
2
Table of Contents
1SAFETY PRECAUTIONS ..........................................................................................................................................3
2SPECIFICATIONS .....................................................................................................................................................4
2.1 Component Overview........................................................................................................................................4
2.2 Standard System Configurations.......................................................................................................................6
2.2.1 Single Channel System Configuration with LFC-1C-PC....................................................................................................6
2.2.2 Multi-Channel Configuration with LFC-6CIO-PC...............................................................................................................6
2.3 Specifications of Converter................................................................................................................................7
2.3.1 Specifications of Single-Channel Converter LFC-1C-PC ..................................................................................................7
2.3.2 Specifications of Multi-Channel Converter LFC-6CIO-PC.................................................................................................7
2.3.3 Overview of Parameter Configuration...............................................................................................................................8
2.4 Specifications of Single-Use Sensors................................................................................................................9
2.4.1 General Specifications .....................................................................................................................................................9
2.5 Basic Dimensions of Main Components..........................................................................................................10
2.5.1 Dimensions of Sensors ..................................................................................................................................................10
2.5.2 Dimensions of Converters..............................................................................................................................................11
2.5.3 Dimensions of Adaptor Cables.......................................................................................................................................12
3INSTALLATION.......................................................................................................................................................13
3.1 Installation of Converter LFC-1C-PC...............................................................................................................13
3.1.1 Overview and Preparation..............................................................................................................................................13
3.1.2 Instructions for Electrical Installation...............................................................................................................................14
3.1.3 Instructions for Mechanical Installation...........................................................................................................................15
3.2 Installation of Converter LFC-6CIO-PC ...........................................................................................................16
3.2.1 Overview and Preparation..............................................................................................................................................16
3.2.2 Instructions for Electrical Installation...............................................................................................................................18
3.2.3 Instructions for Mechanical Installation...........................................................................................................................19
3.3 Installation of Sensors .....................................................................................................................................20
3.3.1 Overview and Preparation..............................................................................................................................................20
3.3.2 Instructions for Electrical Installation...............................................................................................................................20
3.3.3 Instructions for Mechanical and Hydraulic Installation.....................................................................................................21
4OPERATION............................................................................................................................................................22
4.1 General Timing Specifications.........................................................................................................................22
4.1.1 Startup Time ..................................................................................................................................................................22
4.1.2 Thermal Stability Time....................................................................................................................................................22
4.1.3 Zero Adjustment Activation Time....................................................................................................................................22
4.1.4 Automatic Zero Adjustment duration...............................................................................................................................22
4.2 System Operation with LFC-1C-PC.................................................................................................................22
4.2.1 Standalone Operation with Display.................................................................................................................................22
4.2.2 Display Messages..........................................................................................................................................................22
4.2.3 Operation with PLC Interface..........................................................................................................................................23
4.2.4 Operation with Levitronix®Service Software...................................................................................................................24
4.2.5 Operation with RS485....................................................................................................................................................24
4.3 System Operation with LFC-6CIO-PC.............................................................................................................25
4.3.1 Standard Operation with PLC Interface ..........................................................................................................................25
4.3.2 Operation with RS485....................................................................................................................................................25
4.3.3 Standalone Operation with Display.................................................................................................................................25
4.3.4 Operation with Levitronix®Service Software...................................................................................................................25
4.4 Measurement of Dynamic Flow Profiles ..........................................................................................................25
5INSPECTION AND MAINTENANCE .......................................................................................................................26
6TROUBLESHOOTING.............................................................................................................................................26
6.1 Common Troubles...........................................................................................................................................26
6.2 Troubleshooting with Levitronix®Service Software..........................................................................................26
7TECHNICAL SUPPORT ..........................................................................................................................................27
8APPENDIX...............................................................................................................................................................28
8.1 Regulatory Status............................................................................................................................................28
8.1.1 CE Marking....................................................................................................................................................................28
8.1.2 Disposal of Equipment –WEEE Directive 2012/19/EU...................................................................................................28
8.2 Symbols and Signal Words..............................................................................................................................29

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
3
1 Safety Precautions
CAUTION
Do not under any circumstances open the converter or sensor housing.
Levitronix does not assume responsibility for any damage, which occurs
under such circumstances.
!
WARNING
Hazardous voltage may be present.
In case of the usage of an inadequate AC/DC power supply, mains
voltages may be present (even if the system is designed for 24VDC).
The converter must be placed in a spill protected environment. Do not
under any circumstances open the powered converter.
The usage of galvanic separated 3rd party tested (like CE and/or UL)
AC/DC supply is highly recommended.
!
WARNING
Toxic chemicals may be present.
When using the flowmeter to measure chemicals skin contact and toxic
gases may be hazardous to your health. Wear safety gloves and other
appropriate safety equipment.

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
4
2 Specifications
2.1 Component Overview
Figure 1: LEVIFLOW®flow sensors and converter
Figure 2: Accessories
Figure 3: Converter starter kit (see Table 2 Position 4) with components
Single-Channel Converter LFC-1C-PC
4-Digit Display
Zero Adjustment
Adress Setting for RS485
Piezo Transducers
In-/Output Electrical Interface
Digital
Signal Processor
DSP
Levitronix®
Service Software
Interconnect Cable.
Flow Out
LEVIFLOW®
Flow Sensors
Clamp-On
Series LFSC
Single-Use
Series LFS-SU
Flow In
EMI Ferrite
LEVIFLOW®
Starter-Kit USB Stick
USB to RS485
Converter with Cable
Converter
Connection Cable
AC/DC Supply
International
Mains Insert
1a
2
1b
1e
1c
1d
5a
5b
6
C
B
A
G
C
E
F
D
B
A
7a
7b
7c
7d
A
3
8a
8b
B
9
D

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
First Release: 11-Dec-2014
Last Update: 07-Oct-2021
Pos.
Part Name
Article #
1% Accuracy
Flow Range
Fitting
Connector
Note
1a
LFS-03SU-Z
LFS-03SU-Z-G25 1
LFS-03SU-Z-SC1
LFS-03SU-Z-SC1-G25 1
100-30375
100-30399
100-30418
100-30419
35 –800 ml/min
6 –800 ml/min
Triclamp 3/8”
Circular Hirose
type with IP67.
--
1b
LFS-06SU-Z
LFS-06SU-Z-G25 1
LFS-06SU-Z-SC1
LFS-06SU-Z-SC1-G25 1
100-30377
100-30400
100-30394
100-30406
1.7 –8 l/min
0.075 –8 l/min
1c
LFS-10SU-Z
LFS-10SU-Z-G25 1
LFS-10SU-Z-SC1
LFS-10SU-Z-SC1-G25 1
100-30397
100-30405
100-30408
100-30416
4.7 –20 l/min
0.75 –20 l/min
Triclamp 1/2”
1d
LFS-15SU-Z
LFS-15SU-Z-G25 1
LFS-15SU-Z-SC1
LFS-15SU-Z-SC1-G25 1
100-30412
100-30111
100-30431
100-30432
10.6 –50 l/min
2 –50 l/min
Triclamp 1”
1e
LFS-20SU.1-Z
LFS-20SU.1-Z-G25 1
LFS-20SU-Z-SC1
LFS-20SU-Z-SC1-G25 1
100-30483
100-30484
100-30464
100-30465
18.8 –80 l/min
3.2 –80 l/min
Triclamp 1”
Firmware requirements for converters:
LFC-1C-PC -> Rev24 or higher
LFC-6CIO-PC -> Rev07 or higher
Table 1: Standard flow sensor configurations
Note 1: Gamma irradiated with dosage > 25 kGy.
Pos.
Part Name
Part #
Description
Interfaces
2
LFC-1C-PC
100-30374
Single Channel
Converter
Analog Output (4 –20 mA), 2x Digital Output, 1x Digital Input,
RS485 (MODBUS) protocol
Note: EMI ferrite (9) for flow sensor cable included in converter package.
3
(A+B)
LFC-6CIO-PC
100-30446
6-Channel Converter
with I/O Interfaces
(Digital I/O connector 3a and analog
output connector 3b included)
RS485 (MODBUS) protocol
6 analog outputs (4 –20 mA), 6 digital inputs, 6 digital outputs
Order Bus Conn. (8a) and Termination Box (8b) as separate article.
Note 1: EMI ferrite (9) for bus/supply connection to be ordered as separate article.
When stacking multiple converters same ferrite is needed on every sensor cable.
4
LFC-1C-PC-SK
100-91072
Converter Starter Kit
Flow converter LFC-1C-PC (A) with Ferrite (B)
AC/DC desktop supply (C) AC mains cables and world adaptor set (D)
sensor cable LFI-C.1-30 (E), converter connection cable LFI-D.1 (F)
RS485 to USB cable YN-485I-TR (G) and configuration software (H)..
Table 2: LEVIFLOW®converters
Pos.
Part Name
Part #
Features
Special Feature / Description
5a
LFI-C.1-10
LFI-C.1-30
LFI-C.1-60
190-10307
190-10308
190-10309
Cable length: 1 m, PVC
Cable length: 3 m, PVC
Cable length: 6 m, PVC
Interconnect cable for connection between sensor and converter.
5b
LFE-C.2-10
LFE-C.2-30
LFE-C.2-60
190-10310
190-10311
190-10312
Cable length: 1 m, PVC
Cable length: 3 m, PVC
Cable length: 6 m, PVC
Extension cable with wall-mountable connector for cabinet mounting.
Delivered with protective dust cap on wall-mountable connector side.
6
YN-485I-TR, USB to
RS485 Adaptor-TR
Isolated
100-30392
Structure/Design
USB connector (A) with termination resistor and cable with connector
pair (B and C) for external RS485 wire connection. Magnetically
isolated. Cable length is 2m. Included is USB space saver cable (D).
Purpose
Communication over fieldbus of converter with PC
7a
7b
7c
7d
Mounting Bracket LMK-1.2
Mounting Bracket LMK-2.2
Mounting Bracket LMK-3.2
Mounting Bracket LMK-4.2
100-91478
100-91479
100-91480
100-91481
Sensor compatibility
For LFS-03SU and LFS-06SU.
For LFS-10SU.
For LFS-15SU
For LFS-20SU.
Material / Sensor Fixation
Anodized Aluminum / Locking pin concept
8a
Connector Box
for LFC-6CIO-PC
100-30447
COMBICON connector
For wiring RS485 and supply of stacks of LFC-6CIO-PC converter.
8b
Termination Box
for LFC-6C
100-30317
--
For termination of RS485 bus of LFC-6CIO-PC.
9
LeviFlow Splitting Ferrite
100-30353
EMI filtering of DC supply
For LFC-6CIO-PC supply needed.
On sensor cables needed in case of stacking multiple converters.
Table 3: Accessories

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
6
2.2 Standard System Configurations
2.2.1 Single Channel System Configuration with LFC-1C-PC
Figure 4: Standard flowmeter system configuration
2.2.2 Multi-Channel Configuration with LFC-6CIO-PC
Figure 5: Standard flowmeter configuration with LFC-6CIO-PC converter
Single-Channel Converter LFC-1C-PC
4-Digit Display
Zero Adjustment
Adress Setting for RS485
Piezo Transducers
In-/Output Electrical Interface
Power Supply: 24 VDC
Analog and
Digital Outputs
- 1x Analog Output
- 2x Digital Outputs
- 1x Digital Input
Digital
Signal Processor
DSP
Adaptor/Extension Cable
Wallmountable connector
for cabinet mounting
Interconnect Cable
Various lengths.
Direct connection possible.
RS485 (MODBUS)
- Configuration with PC Software
- Data Logging
- Fieldbus Array of Multiple Sensors
LEVIFLOW® Single-Use Sensor LFS-xxSU
Flow Out
Flow In
Connector
Box
EMI Ferrite
LEVIFLOW® Converter LFC-6CIO-PC
(6-Channel with I/O Signals)
4-Digit Display
Zero Adjustment
Address Setting for RS485
Piezo Transducers In-/Output
Signal/Power Bus Connector
Power Supply: 24 VDC
RS485 (MODBUS)
- Configuration with PC Software
- Data Reading
Digital
Signal Processor
DSP
Analog Output
Connector
Digital I/O
Connector
Analog Outputs:
6 Channels
Digital Outputs:
6 Channels
Digital Inputs:
6 Channels
EMI
Ferrite
Adaptor/Extension Cable
Wallmountable connector
for cabinet mounting
Interconnect Cable
Various lengths.
Direct connection possible.
Single-Use Sensor LFS-xxSU
Single-Use Sensor LFS-xxSU
2
1
5b
5a
6
9
1
5a
5b
3
9

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
7
2.3 Specifications of Converter
2.3.1 Specifications of Single-Channel Converter LFC-1C-PC
Characteristics
Description or Values
Power Supply Voltage / Current / Inrush Current
24 VDC ± 10% / 150 mA / Peak of 3.8 A within 210 µs
Ambient Temp / Humidity Range
0 –40 °C (32 –122 °F) / 30 - 85% R.H. (no condensation)
Enclosure Classification and Material
IP-20 (indoor use), ABS
Interfaces
(see Figure 9 for detailed PIN designation and electrical
specification)
- RS485 -> MODBUS protocol -> max. array of 99 channels
- 1x Analog Output: 4 –20mA (0 –20mA configurable)
- 2x Digital Outputs: Flow Alarm, Measurement Error, Volume Counter Pulse, Volume Counter
Alarm, Flow as Frequency or Bubble Detection, Custom Output (default: normally open)
- 1x Digital Input: Volume Counter Reset or Zero Adjust
- 4 Digit display (flow rate, volume counter, error codes), re-zero button
- Address potentiometers for RS485 address setting
Standard Configuration Parameters 1
(Available and configurable with RS485/USB converter and
configuration software)
- Viscosity
- Low Cutoff
- Dampening time (filter)
- Full scale setting
- Linearization (15 points)
- Alarm Outputs (High and Low Alarm)
- Volume Counter and Volume Counter Alarm Settings
Weight / Dimensions / Mounting
130 g / 123 x 75 x 17.5 mm / DIN rail
Duration for Activation of Manual and Digital Zeroing
3 sec
Duration of Zeroing Procedure
LFC-1C-PC: normal 26 sec , maximum 60 sec
Duration of Measurement Ready after Power-On
Warm-Up Time for Full Performance Measurements
10 sec.
30 min.
Table 4: Specifications for converters LFC-1C-PC
Note 1: Other parameters available and described in the LevitronixService Software manual.
2.3.2 Specifications of Multi-Channel Converter LFC-6CIO-PC
Characteristics
6-Channel Converter LFC-6CIO-PC
Power Supply Voltage / Current / Inrush Current
Ambient Temp / Humidity Range
24 VDC ± 10% / 270 mA / Inrush Peak 4.9 A within 180 µs
0 –50 °C (32 –122 °F) / 30 - 85% R.H. (no condensation)
Enclosure Classification and Material
IP-20 (indoor use), ABS
Interfaces
(see Table 9 for LFC-6C and Table 9/Table 10/Table 11 for
LFC-6CIO for detailed PIN designation and electrical
specification)
- RS485 -> MODBUS protocol -> max. array of 99 ch.
- 4 Digit display (flow rate, volume counter, error codes), re-zero button
- Address potentiometers for RS485 address setting
- 6x Analog Outputs: 4 –20mA (0 –20mA configurable)
- 6x Digital Outputs: Flow Alarm, Measurement Error, Volume Counter Pulse, Volume Counter
Alarm, Flow as Frequency or Bubble Detection, Custom Output (default: normally open)
- 6x Digital Input: Volume Counter Reset or Zero Adjust
Configuration Parameters 1
(Available and configurable with RS485/USB converter and
service software)
- Viscosity
- Low Cutoff
- Dampening constant (filter)
- Full scale setting
- Linearization (15 points)
- Alarm Outputs (High and Low Alarm)
- Volume Counter and Volume Counter Alarm Settings
Weight / Dimensions / Mounting
215 g / 140 x 77.3 x 20.5 mm / DIN rail
Duration for Digital and Manual Zeroing
Duration of Measurement Ready after Power-On
Duration of activation: 3 sec Duration of procedure: normal 26 sec, maximum 60 sec.
Measurement ready after power-on: 10 sec. Warm-up for full performance: 30 min.
Table 5: Specifications for multi-channel converter LFC-6CIO-PC
Note 1: Other parameters available and described in the LevitronixService Software manual.
Note: Due to the reduced flow sampling rate per channel, the multi-channel converter LFC-6CIO-PC may be less suitable
for highly dynamic flow measurements in the lower flow range (like for example for flows with sharp pulses caused by roller
pumps).

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
8
2.3.3 Overview of Parameter Configuration
Table 6 shows the standard (“Default”) and possible parameter configurations of the flowmeters. This user
manual is dealing with the standard configuration. For setting up other configurations the Levitronix®Service
Software is needed. Consult the “Service Software User Manual” (see reference on title page of this manual)
for more detailed description.
Block
Parameter
Option/Range
Default
Note
Basic
Sensor size
LFS-xxSU
xx = 03, 06, 20
xx = 03, 06, 10, 15 or 20
(accord. Sensor size)
--
Full scale
0.01 –100 L/min
(accord. Sensor size)
Default Values:
LFS-03SU = 0.8 L/min, LFS-06SU = 8 L/min
LFS-10SU = 20 L/min, LFS-15SU = 50 L/min
LFS-20SU = 80 L/min
Damping time
0 –25 s
2 s
Low-pass filter with
T
fdB  =
 21
3
Fast Dynamic Enable
Off or On
Off
“On” for more dynamic flow readings (see Section 4.4)
Low cutoff
0.0 –25.0 %
2 %
Flow cut to 0 below this percentage of full-scale
If cutoff 0% is chosen, negative flow becomes visible
Kinematic Viscosity
0.00 –99.99 cSt
1 cSt
Kinematic Visc. = Dynamic Visc. / Density
Display Settings
Displayed Parameter
Flow Value in L/min
Flow Value in mL/min
Volume Counter Value
Flow Value in L/min
Parameter shown in converter display
Measurement Resolution
0 digits (#.)
1 digits (#.#)
2 digits (#.##)
3 digits (#.###)
3 digits (#.###)
Analog output
settings
Analog output setting
4 –20 mA or
0 –20 mA
4 –20 mA
--
Digital input
settings
Digital input
Volume counter reset
Zero adjust
Set Volume Counter to zero
Zero adjust
Automates zeroing, when liquid type changes
Digital output
settings
Digital output 1
Flow alarm High
Flow alarm Low
Vol. counter alarm H
Vol. counter alarm HH
Vol. counter Pulse
Measurement Error
Flow as Frequency
Bubble detect
Custom Output
Flow alarm High
- Upper flow limit detection
- Lower flow limit detection
- Flow volume detection first value (one-time)
- Flow volume detection second value
- Pulse per volume
- Error signal (empty sensor etc.)
- Flow as Frequency output (100% of full-scale = 1 kHz)
- Bubble detected signal
- Bits of equipment status can be OR-ed on the output
Digital output 2
Flow alarm Low
Flow alarm
Hysteresis (Flow alarm)
0 –20 %
0 %
Can be used to get tolerance to noise.
Alarm high
0 –125 %
105 %
Alarm setting In percentage of full-scale.
Contact type
N.O. = normally open
N.C. = normally closed
N.O. = norm. open
For digital outputs of converter.
Alarm low
-10 –125 %
-5 %
Alarm setting In percentage of full-scale.
Contact type
N.O. = normally open
N.C. = normally closed
N.O. = norm. open
For digital outputs of converter.
Volume counter
settings
Volume counter enable
(activation box)
activated, not activated
not activated
These are settings for volume detection (integration of
flow).
Has to be active for the options “ Vol. Counter Alarm H”,
“Vol. Counter Alarm HH” and “Vol. Counter Pulse”.
Volume counter base unit
1 mL, 1 L, 1 m3
1 mL
Multiplier factor
0.01, 0.1, 10, 100, 1000
0.1
Volume counter pulse length
0.5, 50, 100ms
0.5 ms
Volume counter alarm enable
(activation box)
activated, not activated
not active
-> Settings for one-time volume detection.
-> Volume = “Volume unit” x “Multiplier factor” x “Vol.
Counter Alarm H“ value”
-> Has to be active for the options “Vol. Counter Alarm
H”, “Vol. Counter Alarm HH”.
Value
(Volume counter alarm H)
0 –999999
--
Contact type (H)
N.O. = normally open
N.C. = normally closed
N.O. = norm. open
Value
(Volume counter alarm HH)
0 –999999
--
Contact type (HH)
N.O. = normally open
N.C. = normally closed
N.O. = norm. open
Measurement
Error Settings
Instant Measurement Error
Ignore Time
0-99 s
10s
During this time instant measurement errors are ignored.
If an instant measurement error stays active for longer
time than this time, measurement error arises.
Flow Level on Measurement
Error
0%, -25, 125%
Hold
0 %
Signal level of analog output and flow, when
measurement error arises
Bubble Detection
Settings
Bubble Detect Hold Time
0 –99 s
0 s
For bubble or particle detection in the process
Table 6: Overview of standard parameters
Note 1: Other parameters available and described in the LevitronixService Software manual.
Note 2: Parameters can be configured with the LevitronixService Software.

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
9
2.4 Specifications of Single-Use Sensors
2.4.1 General Specifications
Characteristics
LFS-03SU
LFS-03SU-SC1
LFS-06SU
LFS-06SU-SC1
LFS-10SU
LFS-10SU-SC1
LFS-15SU
LFS-15SU-SC1
LFS-20SU
LFS-20SU-SC1
Flow Range [l/min]
0 –0.8 l/min
0 –8 l/min
0 –20 l/min
0 –50 l/min
0 –80 l/min
ID of Measurement Path
2.5 mm
6 mm
10 mm
15 mm
20 mm
Accuracy of Reading
Note: Repeatability < Accuracy/2
LFS-03:
>35 ml/min: ±1 %
<35 ml/min:
LFS-03-SC1:
>6 ml/min: ±1 %
<6 ml/min: ±0.06 ml/min
LFS-06:
>1.7 l/min: ±1 %
<1.7 l/min: ±17 ml/min
LFS-06-SC1:
>0.075 l/min: ±1 %
<0.075 l/min: ±0.8 ml/min
LFS-10SU:
>4.7 l/min: ±1 %
<4.7 l/min: ±47 ml/min
LFS-10SU-SC1:
> 0.75 l/min: ±1 %
< 0.75 l/min: ±7.5 ml/min
LFS-15SU:
>10.6 l/min: ±1 %
<10.6 l/min: ±106 ml/min
LFS-15SU-SC1:
> 2 l/min: ±1 %
< 2 l/min: ±20 ml/min
LFS-20SU:
>18.8 l/min: ±1 %
<18.8 l/min: ±188 ml/min
LFS-20SU-SC1:
> 3.2 l/min: ±1 %
< 3.2 l/min: ±32 ml/min
Weight
Wetted Surface Area
Wetted Volume
42 g
29.5 cm2
4 ml
43 g
32.2 cm2
4.8 ml
61 g
53.2 cm2
12.3 ml
96 g
141.2 cm2
60.7 ml
125 g
173.5 cm2
125 ml
Maximum Fluid Pressure
5 bar
5 bar
5 bar
5 bar
5 bar
Pressure Drop Coefficient C
 P = C x Q2 , (for water), Q = Flow [l/min],
 P = Press. Drop [kPa = 10mbar]
16.8 at 20°C
0.880 at 20°C
0.0750 at 20°C
0.0101 at 20°C
0.00350 at 20°C
Fluid Temperature / Ambient Temp.
2–60 oC (35.6–140 oF) / 0–40 oC (32-104 oF)
Kinematic Viscosity / Sound Speed
0.3 –40 mm2/s (0.3 –40 cSt) / 1000 –2200 m/s
IP Classification
IP-65 (for connected sensor)
Wet Material / Sterilization Methods
Polypropylene (FDA, USP VI, ADI free) / Gamma robust for up to 40 kGy
Electrical Connector
Circular type (IP-67), lock-release mounting
Cables
Various extension cables available.
Table 7: Specifications of single-use flow sensors (all data based on calibration with water at 20°C)
Figure 6: Accuracy and repeatability of reading for LFS-03SU single-use sensor
0%
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
110 100 1000
[mlpm]
Accuracy of Reading
Repeatability of Reading
Full Scale Change Line
Full Scale = 35 mlpm
Full Scale = 800 mlpm

User Manual for LEVIFLOW®LFS-SU Flowmeters
www.levitronix.com
PL-4509-00, Rev09, DCO# 21-230
10
2.5 Basic Dimensions of Main Components
2.5.1 Dimensions of Sensors
Figure 7: Dimensions of LFS-03SU and LFS-06SU flow sensors
Sensor
Type
Triclamp
Fitting Size
(ASME BPE 2009)
Dimensions in [mm]
a
b
c
D
d
e
f
g
h
L
LFS-10SU-Z
1/2"
138
80
Ø 12.7 (= 1/2”)
Ø 25
Ø 9.4
44.4
18.6
24
25
110
LFS-15SU-Z
1”
164.8
100
Ø 25.4 (= 1”)
Ø 50.5
Ø 22.2
79.4
23
26
30
160
LFS-20SU-Z
1”
231.2
161.2
Ø 25.4 (= 1”)
Ø 50.5
Ø 22.2
82.5
28
34
35
160
Figure 8: Dimensions of LFS-10SU, LFS-15SU and LFS-20SU flow sensors