Schmidt IL 30.0 Series User manual

SCHMIDT®Volume Flow Sensor
IL 30.0xx
Instructions for Use

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 2
SCHMIDT®Volume Flow Sensor IL 30.0xx
Table of Contents
1Important information.......................................................................3
2Application range.............................................................................4
3Mounting instructions.......................................................................5
4Electrical connection........................................................................8
5Signalling.......................................................................................10
6Commissioning..............................................................................13
7Information concerning operation..................................................13
8Service information........................................................................14
9Technical data ...............................................................................17
10 Dimensions....................................................................................18
11 Declarations of Conformity............................................................19
Imprint:
Copyright 2021 SCHMIDT Technology GmbH
All rights reserved
Version: 557006.02D
Subject to modifications

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 3
1 Important information
The instructions for use contain all required information for a fast commis-
sioning and safe operation of SCHMIDT®volume flow sensors.
These instructions for use must be read completely and observed care-
fully, before putting the unit into operation.
Working on a pressurized system as well as assembly, electrical instal-
lation, commissioning and operation of the sensor may only be carried
out by trained specialists. Safety and accident prevention regulations
must be observed.
Any claims under the manufacturer's liability for damage resulting from
non-observance or non-compliance with these instructions will become
void.
Tampering with the device in any way whatsoever - with the exception
of the designated use and the operations described in these instruc-
tions for use - will forfeit any warranty and exclude any liability.
The unit is designed exclusively for the use described below (refer to
chapter 2). In particular, it is not designed for direct or indirect protec-
tion of personal or machinery.
SCHMIDT Technology cannot give any warranty as to its suitability for
certain purpose and cannot be held liable for errors contained in these
instructions for use or for accidental or sequential damage in connec-
tion with the delivery, performance or use of this unit.
Symbols used in this manual
The symbols used in this manual are explained in the following section.
Danger warnings and safety instructions. Read carefully!
Non-observance of these instructions may lead to injury of per-
sonal or malfunction of the device.
General note
All dimensions are given in mm.
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 4
2 Application range
The SCHMIDT®Volume Flow Sensor IL 30.0xx is designed as inline
sensor i.e. the tubular measuring section is already integrated in its basic
body.
Four variants with different diameters are offered:
Type
Inner-Ø
[mm]
Thread
connection
Volume flow
[Norm-m3/h]
Article No.
IL 30.005
16.1
DN 15 / G½
76.3
550 250
IL 30.010 MPM
27.3
DN 25 / G1
229
550 251
IL 30.015 MPM
41.9
DN 40 / G1½
417
550 252
IL 30.020 MPM
53.1
DN 50 / G2
712
550 253
Table 1
Connection to the pipe system is carried out by the internal threads on
both sides of the base body, suitable extended measuring sections are
offered by SCHMIDT Technology as optional accessory (see Table 2).
The IL 30.0xx measures both volume flow as well as the temperature of
pure air and other inert
1
gases which are classified in fluid group 2 accord-
ing to the Pressure Equipment Directive 2014/68/EU (PED), i.e. no
chemically aggressive components or abrasive particles are included.
The sensor and the aforementioned measuring sections are designed for
a maximum operating pressure of 16 bar and are covered by article 4,
paragraph 3 of the PED. Accordingly, the devices are designed and man-
ufactured in accordance with the sound engineering practice.
The sensor is based on the measuring principle of a thermal anemometer
and measures the standard volume flow of the measuring medium which
is output in a linear way as standard (respective: Norm) volume flow 
󰇗
(unit: m3/h), referred to standard conditions of TN= 1013.25 hPa and pN=
20 °C. Thus, the resulting output signal is independent of the pressure and
temperature of the measured medium.
The sensor features several special properties, notably due to the unique
Multi-Point-Measurement design (MPM) of its sensor elements:
o Best measurement results even in not fully smoothened air flows
o Excellent sensitivity
o High measurement dynamics
When using the sensor outdoors, it must be protected against
direct exposure to the weather.
1
Check suitability in individual cases.
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 5
3 Mounting instructions
General information on handling
The SCHMIDT®Volume Flow Sensor IL 30.0xx is a precision instrument
with high measuring sensitivity, which can be achieved only by a delicate
structure of its measuring probes. Therefore, applying mechanical forces
to the probe tips inside the housing should be avoided if possible. In case
of cleaning by the customer, this should preferably be made contactless
(e.g. with a spray) or only with appropriate care.
The sensor probes should not be touched or exposed to any
other mechanical effects.
Likewise, a touch can cause electrical damage to the ESD-sensitive sen-
sor elements.
The sensor probes can be damaged by ESD.
To protect the sensitive inside, SCHMIDT Technology delivers the sensor
with protective caps placed into both ends of its body which should be
removed only before final installation. And vice versa when dismounting
the sensor the protective caps should be attached in place immediately.
In general, great care is required when handling the sensor.
The housing of the sensor is made of anodized aluminium. This ensures
a low-friction screw-in of the installation pipes into the housing. Due to the
softness of the material, however, the thread windings could be irreversi-
bly damaged when tilting the pipes while screwing in.
The threads of the sensor body can take irreversible damage if
handled incorrectly, i.e. by tilting pipes when screwing in.
If the sensor is installed without the extended measurement sections,
which are offered optionally by SCHMIDT Technology, the dimensions
and tolerances prescribed by the manufacturer must be observed strictly
for the customized installation.
Corresponding dimensional drawings are available as download from
www.schmidt-sensors.com or www.schmidttechnology.de
The mounting position of the sensor is arbitrary.
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 6
Systems with overpressure
The IL 30.0xx is designed for a maximum working pressure of 16 bar. As
long as the measuring medium is operated with overpressure, make sure
that:
There is no overpressure in the system during installation.
Only appropriately pressure-tight mounting accessories are used.
All connections to pressurized systems are checked for pressure tight-
ness from time to time.
Mounting and dismounting of the sensor can be carried out only
as long as the system is in depressurized state.
The extended measuring sections, which are optionally available from
SCHMIDT Technology (see subchapter Accessories), are delivered with
two O-Rings which are intended as pressure seals for easy installation
(must be applied by customer). If the customer uses his own pipes, suita-
ble installation and sealing equipment must be used (e.g. sealing tape). In
any case take care that the threads are screwed into the housing without
tilting, to avoid damaging of the sensor body. Furthermore, before apply-
ing pressure, the sensor must be checked for a safe and firm installation.
After pressurization check for any leakages and eliminate them immedi-
ately if there are some.
Before applying pressure, make sure that all screw connections
are firmly seated and cannot be loosened. Unscrewing while the
system is under pressure can damage the sensor and can also
result in serious harm to your health.
The pressure sealing parts of the installation have to be checked
regularly for pressure tightness and safe installation.
Flow characteristics
Local turbulences of the medium can cause distortion of measurement
results. The resulting measurement distortions are reduced to a minimum
by the special sensor design “MPM” (Multi-Point-Measurement –all vari-
ants except IL 30.005). In order to get maximum accuracy it’s neverthe-
less advisable to smooth turbulences of the gas flow before applying it to
the sensor.
The simplest method is to provide a sufficiently long distance both in front
of (run-in distance) as well as behind the sensor (run-out distance) abso-
lutely straight and without disturbances.
The absolute length of the respective distances is indicated as a multiple
of the inner diameter D of the pipe.
!
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 7
For optimal measurement results it is recommended to provide standard
distances of at least 10•D before and 5•D after the sensor. Using sensor
types with MPM these distances can be reduced to at least 3•D before
and 3•D after it in case of modest sources of disturbance (e.g. 90° arcs).
If this is not possible, the run-in distance should take up ⅔of the available
measuring length and the run-out distance ⅓of it.
In particular, care must be taken to ensure that the inner diameters of the
attached pipes correspond exactly to that of the sensor. Steps in the pipe
cross-section lead to strong deviations of measurement results and re-
quire longer inlet distances.
Accessories for installation
For mounting of the SCHMIDT®Volume Flow Sensor IL 30.0xx, there
are several accessories available (see Table 2).
Type / article No.
Drawing
Mounting
Connecting cable
fixed length:
5m 523 565
- Threaded ring, hexagon
- Plug injection-moulded
- Wires: 5 x 0.34 mm2
- Material:
Stainless steel
PUR, PVC
Connecting cable
optional length:
xm 523 566
x= 2 … 100 m
(Step: 1 m)
- Threaded ring, hexagon
- Wires: 5 x 0.34 mm2
- Material:
Stainless steel
PA, PUR, PP
Free of halogen2
Coupler socket
Thread locking
system (VA)
523 562
- Threaded ring, hexagon
- Material:
Stainless steel
PA, PUR, PP
- Connection of leads:
Bolted (5 x 0.75 mm2)
Extended measur-
ing sections
½”: 556 954
1”: 556 955
1½“: 556 956
2”: 556 957
- Type of thread:
G and R
- Material:
Stainless steel (pipe)
NBR 70 (O-rings)
Table 2
2
According to IEC 60754
L=5m
14
5,1
42
L=XXm
20
54
4,6
für Kabel- 4-6mm
20
54
For cable-
150
R

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 8
4 Electrical connection
The sensor features two connectors:
Main connector:
- Connection of voltage supply
- Output of measuring signals
Module connector:
For connection of an optional ex-
tension module.
Figure 1
Main connector
This connector is a 5-pin plug, type M12 (male, A-coded) with a thread for
the connecting cable
3
(pin assignment: Figure 2 and Table 3).
Figure 2:
View on connector
of sensor (male)
Pin
Designation
Function
Wire colour
1
Power
+US(+24 V)
Brown
2
Analogue 
󰇗
Volume flow
White
3
GND
GND
Blue
4
Analogue TM
Temperature of medium
Black
5
Impulse
Volume
Grey
Table 3 Pin assignment
The specified lead colours are valid for connecting cables from SCHMIDT
Technology (see subchapter Accessories).
During electrical installation ensure that no voltage is applied and
inadvertent activation is not possible.
The plug housing, and thus also a possibly screen of a plugged connection
cable, is electrically connected to the metal housing of the sensor.
The appropriate protection class III (SELV) respective PELV
(according EN 50178) has to be considered.
3
The spigot nut is located at the connecting cable.
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 9
Power supply
For proper operation the sensor requires direct voltage with a nominal
value of 24 V with permitted tolerance of ±10 %.
Deviating values lead to deactivation of measuring of the volume flow or
even to defects and, therefore, should be avoided. As far as it is function-
ally possible, the LED indication reports the faulty operational conditions
(see chapter 5).
Only operate sensor within the defined range of supply voltage
(US= 24 VDC ± 10 %).
Undervoltage may result in malfunction; overvoltage can lead to
irreversible damage.
Specifications for operating voltage apply to the connection at the sensor.
Voltage drops generated due to line resistances must be considered by
the customer.
The operating current
4
of the sensor is at minimum 25 (15) mA up to a
maximum of 300 (180) mA.
Wiring of analogue outputs
Both analogue outputs (volume flow and temperature of medium) are de-
signed as short-circuit protected current interfaces (4 …20 mA).
The respective load RLmust be connected to the reference potential
(GND) of the sensor.
Load specification: RL≤500 ; CL≤10 nF
Wiring of impulse output
The pulse output (volume) is designed as highside driver (P-MOSFET,
open drain) connected to the (reverse protected) operating voltage. The
output is protected by two methods, a serial diode against higher external
voltage as well as generally by an analogue current limitation with a limit
of typical 50 mA (max. 65 mA).
The load has to be connected to GND.
Module connector
The SCHMIDT®Volume Flow Sensor IL 30.0xx comes with an additional
connector (M12, female, A-coded, 5-pin) for connecting optional expan-
sion modules (see Figure 1).
Only expansion modules from SCHMIDT Technology may be
connected to the module connector.
4
Current of impulse output not included; operation current of IL 30.005 in brackets.
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 10
5 Signalling
Light emitting diodes
The SCHMIDT®Volume Flow Sensor IL 30.0xx has four Duo-LEDs (see
Figure 3) to indicate its operational status (see Table 4):
In error-free operation: Volume flow (bar graph mode)
Problems in operation: Cause of detected error
Figure 3
No.
State
LED 1
LED 2
LED 3
LED 4
1
Ready for operation & volume flow < 5 %5
2
Volume flow > 5 %
3
Volume flow > 20 %
4
Volume flow > 50 %
5
Volume flow > 80 %
6
Volume flow > 100 % = overflow
7
Sensor element defective
8
Operating voltage too low
9
Operating voltage too high
10
Electronic temperature too low
11
Electronic temperature too high
12
Medium temperature too low
13
Medium temperature too high
Table 4
LED off
LED on: orange
LED on: green
LED flashes (1 Hz): rot
5
„%“ of final value of measuring range of volume flow
LED 1

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 11
Analogue outputs
Representation of measuring range
The measuring range of the corresponding measuring value is mapped
in a linear way to the signal range.
For volume flow measurement the measuring ranges from zero to the
variant-specific end of the measuring range 
󰇗 (see Table 5, left).
Volume flow
Temperature of medium
IOut
[mA]
TM [°C]
20
4
8
22
1212
16
2
020-20 40 60

󰇗
󰇗
   󰇛
󰇗  󰇜
 
     
Table 5
The measuring range of the medium temperature TMis specified be-
tween -20 °C and +60 °C.
Note regarding commissioning:
Normally the temperature output indicates approx. 12 mA because the
typical prevailing room temperature of 20 °C corresponds to about half
of the measuring range.
Error signalling
6
The interface outputs 2 mA.
Exceeding measuring range of volume flow
Measuring values higher than 
󰇗 are output linearly up to 110 % of
the signalling range (this corresponds to the maximum output of
21.6 mA, see left image in Table 5). For higher values the output signal
remains constant.
Error signalling doesn’t take place because damage of the sensor is
unlikely.
6
In accordance to NAMUR specification
110 wN [%]
020 40 8060 100
IOut
[mA]
20
4
21,6
12
8
16

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 12
Medium temperature beyond specification range
Operation beyond specified limits
7
can damage the measuring probes
and, therefore, is seen as a critical error:
o Medium temperature below -20 °C:
The analogue output for TMswitches to error signalling (2 mA).
The measuring function of volume flow is switched off; its analogue
output also reports an error (2 mA).
o Medium temperature above +60 °C:
Up to 65 °C the temperature is still output linearly (corresponds to
21 mA), e.g. to enable an overshooting of a heating control. The
volume flow is measured and displayed further on.
Above this critical limit the measurement of volume flow is switched
off and its outputs are going to error (2 mA / locked). The output for
TMjumps directly to its maximum value of 22 mA which differs from
standard error signalling.
In case of excessive temperature, this avoids a harmful feedback of
the heating control that might be measuring by means of the me-
dium temperature sensor. The standard error signaling (2 mA)
could be identified by the control as a very low temperature of the
medium which would lead to further heating.
Impulse output
Signalling
One impulse represents a defined volume that has flowed.
During the pulse signal itself, the output transistor switches through for
a fixed time (conducting) otherwise the transistor is locked (high im-
pedance).
o Pulse valence:
IL 30.005; IL 30.010 MPM: 0.1 Norm-m3
IL 30.015 MPM; IL 30.020 MPM: 1.0 Norm-m3
o Pulse duration (fix): 1 s
Error signalling
As long as the analogue flow volume output signals an error (2 mA),
the pulse output is locked (high impedance).
7
Switching hysteresis for the threshold is approx. 2 K.

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 13
6 Commissioning
Before applying supply voltage to the SCHMIDT®Volume Flow Sensor
IL 30.0xx the following checks have to be carried out:
Mechanical mounting:
o All screws are tightened properly.
o Suitable pressure protection measures are carried out (e.g. sealing
tape in the threads).
For measurements in media with overpressure check if all
screws are tightened properly and all mechanical connec-
tions are pressure tight.
Connecting cable:
o Proper connection in the field (switch cabinet or similar).
o Tight fit of spigot nut of the connector of the connecting cable at
sensor enclosure.
If the sensor is in the correct operational state after initialization it switches
into measuring mode. The indication of volume flow (both LEDs and signal
outputs) jumps for a short period to maximum and settles after approx.
one second at the correct measuring value provided the sensor probe has
medium temperature already. Otherwise, the process will prolong until the
sensor has reached medium temperature.
7 Information concerning operation
Ambient condition temperature
The SCHMIDT®Volume Flow Sensor IL 30.0xx monitors the tempera-
ture of both medium and electronics. As soon as one limit of the specified
operation ranges is exceeded, the sensor switches off one or both meas-
uring functions associated with the medium depending on the situation
and report the corresponding error. As soon as proper operational condi-
tions are restored, the sensor resumes normal function.
Even short-term exceedance or undershooting of operating tem-
peratures can cause irreversible damage to the sensor.
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 14
Ambient condition medium
The SCHMIDT®Volume Flow Sensor IL 30.0xx is suitable for clean, non-
combustible air and gases that contain neither dust, abrasive particles or
vapours nor gaseous oils or chemical aggressive components.
Depending on the consistency and composition, deposits or other contam-
inants may lead to falsification of the measured value and should be
avoided coercively (see chapter 8).
Soiling or other deposits on the sensing elements cause false
measurement results. Therefore, the sensor should be checked
for contaminations regularly and, if necessary, has to be cleaned
or send in for maintenance.
When cleaning, use only mild agents (such as isopropanol) and avoid di-
rect contact of the sensor elements as far as possible.
The suitability of the sensor for use in any non-clean media must be
checked in individual cases.
Condensing liquid fractions in gases or even immersion into liquids can
damage the probe and therefore must be avoided strictly. Also, the signif-
icantly higher heating capacity of liquids distorts the measuring results se-
riously (in this case a much higher volume flow is detected and will be
signalled).
(Condensing) liquid on the measuring probes causes serious
measurement distortions and can also damage the sensor irre-
versibly.
For maximum accuracy in real applications, the SCHMIDT® Volume Flow
Sensor IL 30.0xx MPM is matched in pressures > 3 bar. In order to avoid
additional measurement deviations, the use of it at > 50 % of the measur-
ing range is only recommended at pressures > 3 bar.
When using a SCHMIDT® Volume Flow Sensor IL 30.0xx MPM
in higher standard volume flows (> 50 % of measuring range), a
minimum operating pressure of 3 bar is recommended for opti-
mal measurement results.
8 Service information
Troubleshooting
Possible errors (error images) are listed in Table 6.
Furthermore several causes and measures to eliminate the error are de-
scribed.
Causes of any error signaling have to be eliminated imme-
diately. Exceeding or falling below the permitted operating
parameters can result in permanent damage to the sensor.
!
!
!
!

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 15
Error image
Possible causes
Troubleshooting
Problems with supply US:
No USavailable
Wrong polarity (DC)
US< 15 V
Sensor is defective
Connector screwed on cor-
rectly?
Supply voltage connected
correctly?
Supply voltage at sensor
plug available (cable break)?
Power supply sufficient?
No LED is shining
All signal outputs are at
zero
Start sequence is repeated
continuously (all LEDs
flashes simultaneously in
red - yellow - green)
USunstable:
Power unit cannot supply
switch-on current
Other consumers over-
load power source
Wire resistance too high
Supply voltage at sensor sta-
ble?
Power supply sufficient?
Voltage losses over cable
negligible?
Sensor element defective
Send in sensor for repair
Supply voltage US< 21.6 V
Increase supply voltage
Supply voltage US> 26.4 V
Decrease supply voltage
Electronic temperature too
low
Increase temperature of
environment
Electronic temperature too
high
Decrease temperature of
environment
Medium temperature too
low
Increase medium temperature
Medium temperature too
high
Reduce medium temperature
Signal 
󰇗is too large /
small
Measuring medium does
not correspond to air
Sensor elements are soiled
Sensor elements are
moistened
Gas correction considered?
Send in sensor for cleaning /
maintaining
Dry sensor elements
Signal 
󰇗is fluctuating
USunstable
Installation conditions:
Run-in or run-out
distance is too short
Strong fluctuations of
pressure or temperature
Check voltage supply
Check installation conditions
Check operating parameters
Analogue signal perma-
nently at maximum
Load resistance of signal
output is at +US
Connect load resistance to
GND
Table 6
LED off
LED on: orange
LED on: green
LED flashes (1 Hz): rot

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 16
Transport / shipment of the sensor
For transportation or dispatching of the sensor, it must be well protected
against vibrations and shocks. Ideally, the sensor is shipped with fitted
protective caps and in its original packaging.
Soiling, mechanical stress and / or touching the sensor elements should
be avoided.
Calibration
If the customer has made no other provisions, we recommend repeating
the calibration at a 12-month interval. For this purpose the sensor must be
sent in to the manufacturer.
A calibration can be carried out only if the basic sensor, i.e. without
mounted extended sections or other pipes, is sent in. Also make sure that
there are no damages especially concerning the sensor elements and the
inner mounting threads.
Spare parts or repair
No spare parts are available, since a repair is only possible at the manu-
facturer's facility. In case of defects, the basic sensor must be sent in to
the supplier for repair. Any other installed parts like pipes or measurement
extensions have to be removed.
A completed declaration of decontamination must be attached.
The appropriate form “Declaration of decontamination” form is enclosed
with the sensor and can also be downloaded from
www.schmidt-sensors.com
under “Calibration Service Center”.
Alternatively it can be downloaded from
www.schmidttechnology.de
under the heading "Product Downloads" in "Service & Support / Sensor
Technology”.
If the sensor is used in systems important for operation, we recommend
keeping a replacement sensor in stock.
Test and material certificates
Every new sensor is accompanied by a certificate of compliance according
to EN 10204-2.1. Material certificates are not available.
Upon request, we shall prepare, at a charge, a factory calibration certifi-
cate, traceable to national standards.

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 17
9 Technical data
Sensor technology
Thermal inline volume flow sensor (with MPM8)
Measurands
Standard9volume flow 
󰇗
Temperature of medium TM
Measuring ranges10 
󰇗
½”: 0.15 …76.3 Norm-m3/h
1“: 0.50 …229 Norm-m3/h
1½”: 1.00 … 417 Norm-m3/h
2”: 2.00 … 712 Norm-m3/h
Measuring accuracy 
󰇗
±(3 % of measured value + 0.3 % of fmr11)
With higher volume flows (> 50 % of fmr) an operating pres-
sure > 3 bar is recommended for optimal measuring results.
Response time (t90) 
󰇗
Approx. 5 s
Measuring accuracy TM
≤ ±2 K (volume flow > 2 % of fmr)
Measurement direction
Unidirectional
Mounting position
Arbitrary
Medium to be measured
Clean (compressed-) air, nitrogen; other gases on request
(fluid group 2 according PED 2014/68/EU)
Compression strength
16 bar (overpressure)
Humidity range
≤ 95 % rel. humidity, non-condensing
Operating temperature
-20 … +60 °C
Installation
Inner threads DN 15 … DN 50 (G½ … G2)
Analogue output
Current interface (short circuit protected)
Signal range: 4 … 20 mA (2 mA error signal)
Load: RL≤500 / CL≤10 nF
Impulse output
Highside driver (open drain, short circuit protected)
Pulse valence: 0.1 / 1.0 Norm-m3
Pulse duration: 1 s (transistor conducting)
Pulse high level: > US–1 V (current limiting inactive)
Current limit: Typ. 50 mA (max. 65 mA)
Display
4 dual LEDs (bar graph display of 
󰇗/ sensor status)
Supply Voltage US
24 V DC ± 10 %
Current consumption
(without impulse output)
IL 30.005: ≤120 mA
IL 30.0xx MPM: ≤300 mA
Electrical Connection
Main connector: M12, male, A-coded, 5-pin
Module connector: M12, female, A-coded, 5-pin
Length of connection cable
Max. 30 m (observe wire resistance)
Type / class of protection
IP64 (housing) / III (SELV) or PELV (EN 50178)
Material of housing
Anodized aluminium
8
MPM: Multi-Point-Measurement; except IL 30.005 with only one measurement point
9
Based on standard (Norm) conditions TN= 20 °C and pN= 1013.25 hPa
10
Minimal value of measuring range = lower detection limit
11
fmr: final value of measuring range

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 18
10 Dimensions
Type
Hges.
H1
B
Article number
IL 30.005
59
27
75
550 250
IL 30.010 MPM
71
39
75
550 251
IL 30.015 MPM
86
54
75
550 252
IL 30.020 MPM
98
66
82
550 253
All dimensions in mm

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 19
11 Declarations of Conformity
SCHMIDT Technology GmbH herewith declares in its sole responsibility,
that the product
SCHMIDTVolume Flow Sensor IL 30.0xx
Part-Nos. 550 250, 550 251, 550 252, 550 253
is in compliance with the appropriate
European guidelines and standards
and
UK statutory requirements and designated standards.
The corresponding declarations of conformity can be download from
SCHMIDT®homepage:
www.schmidt-sensors.com
www.schmidttechnology.de

Instructions for Use - SCHMIDT®Volume Flow Sensor IL 30.0xx Page 20
SCHMIDT Technology GmbH
Feldbergstraße 1
78112 St. Georgen
Germany
Phone [phone] / 899-0
Fax [phone] / 899-101
Email [e-mail]
URL www.schmidt-sensors.com
www.schmidttechnology.de