M&C SP Series User manual

Gas Sample ProbeSeries SP®
SP190-H/DIL-EX2 T2
SP190-H/DIL-EX2 T3
SP190-H/DIL-EX2 T4
Instruction Manual
Version 1.01.00

2 SP190-H/DIL-EX2 T* |1.01.00 www.mc-techgroup.com
Dear customer,
Thank you for buying our product. In this instruction manual you will find all necessary information about
this M&C product. The information in the instruction manual is fast and easy to find, so you can start
using your M&C product right after you have read the manual.
If you have any question regarding the product or the application, please don’t hesitate to contact M&C
or your M&C authorized distributor. You will find all the addresses in the appendix of this manual.
For additional information about our products and our company, please go to M&C’s website www.mc-
techgroup.com. There you will find the data sheets and manuals of all our products in German and
English.
Disclaimer
This manual does not claim to be complete and it may be subject to
technical modifications.
©
05/2020 M&C TechGroup Germany GmbH. Reproduction of this
document or its content is not allowed without permission from M&C.
Version: 1.01.00

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Table of Contents
1General information.................................................................................................................... 4
2Declaration of conformity........................................................................................................... 4
3Safety instructions ..................................................................................................................... 5
4Warning signs and definitions................................................................................................... 6
5Information regarding the usage in explosive atmospheres ................................................... 8
6Warranty...................................................................................................................................... 8
7Introduction................................................................................................................................. 9
7.1 Serial numbers .................................................................................................................... 10
7.2 Power supply....................................................................................................................... 10
8Technical Data .......................................................................................................................... 11
8.1 Gas Sample Probe with Weather Protection Cover.............................................................. 11
8.2 Gas Sample Probe without Weather Protection Cover......................................................... 12
9Applications .............................................................................................................................. 15
10 Dilution principle ...................................................................................................................... 16
11 Description................................................................................................................................ 17
12 Probe design............................................................................................................................. 19
13 Receiving the sample probe .................................................................................................... 21
14 Preparation for Installation ...................................................................................................... 21
15 Installation................................................................................................................................. 22
15.1 Connecting the heated sample line...................................................................................... 24
15.2 Connection of supply gas lines (dilution gas or blow back) .................................................. 24
15.3 Connecting the test gas line................................................................................................. 25
16 Electrical Connection ............................................................................................................... 26
17 Starting up................................................................................................................................. 27
17.1 Calibration ........................................................................................................................... 29
18 Closing down ............................................................................................................................ 29
19 Maintenance.............................................................................................................................. 29
19.1 Disassembly of the dilution block......................................................................................... 32
19.2 Cleaning of the critical orifice, the eductor and checking or changing of the O-rings............ 32
20 Decommisioning....................................................................................................................... 35
21 Proper Disposal of the Device ................................................................................................. 35
22 Spare parts and consumables ................................................................................................. 36
23 Appendix ................................................................................................................................... 36
Table of Figures
Figure 1 Dilution principle ............................................................................................................... 16
Figure 2 Gas flow diagram ............................................................................................................. 18
Figure 3 Dimensions and construction: SP190-H/DIL-EX2 T* with weather protection cover.......... 19
Figure 4 Dimensions and construction: SP190-H/DIL-EX2 T* X w/o weather protection cover ....... 20
Figure 5 Borehole diagram of the terminal box (version without weather protection cover)............. 23
Figure 6 Electrical connection diagram........................................................................................... 26
Figure 7 Extract from an injector data sheet ................................................................................... 28
Figure 8 Change filter element ....................................................................................................... 31
Figure 9 Dilution block and special tool .......................................................................................... 33
Figure 10 Eductor with O-rings ..................................................................................................... 34
Figure 11 Critical orifice with O-rings ............................................................................................ 34

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Headquarters
M&C TechGroup Germany GmbH Rehhecke 79 40885 Ratingen Germany
Phone: +49 - 2102 - 935 – 0
Fax: +49 - 2102 - 935 - 111
E - mail: [e-mail]
Website: www.mc-techgroup.com
1 General information
The product described in this manual has been built and tested in our production facility.
All M&C products are packed to be shipped safely. To ensure the safe operation and to maintain the
safe condition, all instructions and regulations stated in this manual need to be followed. This manual
includes all information regarding proper transportation, storage, installation, operation and
maintenance of this product by qualified personnel.
Please follow all instructions and warnings closely.
Please read this manual carefully before commissioning and operating the device. If you have any
questions regarding the product or the application, please don’t hesitate to contact M&C or your M&C
authorized distributor.
2 Declaration of conformity
CE - Certification
The product described in this operating manual complies with the following EU directives:
ATEX-Directive
The product described in this manual is produced in accordance with the EU directive for devices and
protection systems for appropriate use in hazardous areas 2014/34/EU appendix II.
EMC-Instruction
The requirements of the EU directive 2014/30/EU “Electromagnetic compatibility“ are met.
Low Voltage Directive
The requirement of the EU directive 2014/35/EU “Low Voltage Directive“ are met.
The compliance with this EU directive has been examined according to DIN EN 61010.
Declaration of conformity
The EU Declaration of conformity can be downloaded from the M&C homepage or directly requested
from M&C.

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3 Safety instructions
Please follow these safety directions and instructions regarding installation, commissioning
and operation of the SP190-H/DIL-EX2 T*:
•Read this manual before commissioning and operating the product. Please make sure to follow
all safety instructions.
•Installation and commissioning of electrical devices must be carried out only by qualified skilled
personnel in compliance with the current regulations.
•The installation and commissioning of the device must conform to the requirements of VDE 0100
(IEC 364) ‘Regulations on the Installation of Power Circuits with Nominal Voltages below 1000V’
and must be in compliance with all relevant regulations and standards.
•Furthermore, the supplements for the installation of electrical systems, as in EN 60079-14, must
be complied with.
•When used in hazardous areas, the relevant national and international standards and regulations
must be observed.
•Before connecting the device, please make sure to compare the supply voltage with the specified
voltage on the product label.
•Protection against damages caused by high voltages:
Disconnect the power supply before opening the device for access. Make sure that all extern
power supplies are disconnected.
•Operate the device only in the permitted temperature and pressure ranges. For details please
refer to the technical data sheet or manual.
•Install the device only in protected areas, sheltered from rain and moisture. The product should
not be exposure to the elements.
•Installation, maintenance, inspections and any repairs of the devices must be carried out only by
qualified skilled personnel in compliance with the current regulations.

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4 Warning signs and definitions
Danger
The ‘Danger’ warning sign indicates that death, serious injury and/or
significant material damage will be the consequence, if the
appropriate precautions should not be taken.
Warning
The ‘Warning’ warning sign indicates that death, serious injury or
damage to property may occur if the relevant
precautionary
measures are not observed.
Caution
The ’Caution’ warning sign indicates that slight personal injury can
occur if the appropriate safety precautions are not observed.
Caution
’Caution‘ indicates that damage to property can occur if the
appropriate safety precautions are not observed.
Attention
‘Attention’ indicates that an unintended result or situation can occur
if the corresponding information is not taken into account.
Note
‘Note’ indicates important information relating to the product or
highlights parts of the documentation for special attention.
Qualified personnel
‘Qualified personnel’ are experts who are familiar with the
installation, commissioning, maintenance and operation of these
t
ypes of products. The following knowledge is at least required for
the work:
•Instructed person in EX-protection
•Trained person in the electrotechnical field
•
Detailed knowledge of the manual and the applicable safety
regulations
‘Ex‘ indicates important information about the product or about the
corresponding parts in the instruction manual, relating to usage in
potentially explosive atmospheres.
High voltages!
Protect yourself and others against damages which might be caused
by high voltages.

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Hot surface!
Contact may cause burn! Do not touch!
Wear protective gloves!
Working with chemicals, sharpe objects or extremly
high
temperatures requires wearing protective gloves.
Wear safety glasses!
Protect your eyes while working with chemicals or sharpe objects.
Wear safety glasses to avoid getting something in your eyes.
Wear protective clothes!
Working with chemicals, sharpe objects or extremly high
temperatures requires wearing protective clothes.

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5 Information regarding the usage in explosive atmospheres
The device can be operated in potentially explosive atmosphere of explosive zone 2.
The Ex marking for the SP190-H/DIL-EX2 T* is:
II 3G Ex ec mc IIC T2/T3/T4 Gc
You will find a copy of the declaration of conformity in the appendix of this
instruction manual.
Follow closely all specified conditions and installation instructions
regarding the installation and operation of the sample probe. Only by
complying to all requirements, safe operation in explosive atmospheres is
ensured.
Any modification of the standard configuration of the sample probe with
parts, which are not approved by M&C and not explicitly specified for
usage in explosive atmospheres, will void the Type Examination
Certificate. This also refers to any repair work and service using parts
which are not M&C approved and not specified for usage in explosive
atmospheres.
Please don’t hesistate to contact M&C or your M&C distributer if you
have any questions about parts, repair work and services of the SP190-
H/DIL-EX2 T*.
Warning
Protect yourself and others against damages which might be caused by
high voltage. Disconnect power supply before opening the device for
access. Make sure that all external power supplies are disconnected.
For devices with weather protection cover, the weather protection cover
may only be cleaned with a suitable damp cloth. Operation of the probe is
only possible with a weather protection cover.
Prevent electrostatic discharge during installation and operation! Avoid
buildup of electrostatic electricity caused by operation, maintenance or
cleaning of the device.
6 Warranty
In case of a device failure, please contact immediately M&C or your M&C authorized distributor.
We have a warranty period of 12 months from the delivery date. The warranty covers only appropriately
used products and does not cover the consumable parts. Please find the complete warranty conditions
in our terms and conditions.
The warranty includes a free-of-charge repair in our production facility or the free replacement of the
device. If you return a device to M&C, please be sure that it is properly packaged and shipped with
protective packaging. The repaired or replaced device will be shipped free of delivery charges to the
point of use.

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7 Introduction
Dilution probes are used wherever dilution of the sample gas is necessary for the measurement of one
or several sample gas components. Examples are the measurement of toxic gas components, mois-
ture measurements or adjustment of the sample gas concentration to the analyser measuring range.
The M&C gas sample probe type SP190-H/DIL-EX2 T* is based on the SP180-H-EX2 T* probe, and is
used for continuous gas sampling and dilution.
M&C gas sample probes provide direct insitu ultra-fine filtration during continuous gas sampling for
analytic measurements. In this way, part of the necessary maintenance work for a system is
concentrated on a single point. This filter technology has the major advantage that dust mixtures
consisting of ultra-fine and coarse dusts can be optimally retained with the least possible maintenance
work.
Optimal adaptation of the sample probe to processing conditions and to measurement work is a
necessary condition for a measurement system to work smoothly. Basically, the gas sample should be
kept to a necessary minimum. This is made possible thanks to optimised downstream gas processing
using M&C components. Only in this way it is possible to reduce maintenance to a minimum while
ensuring maximum availability.
The SP190-H/DIL-EX2 T* is certified for appropriate use in the specified Ex zones.
Only operate the gas sample probe according the specifications stated in this
instruction manual and in the extended manufacturer documents.
The type SP190-H/DIL-EX2 T* is not designed to separate the gas explosion zone
without appropriate precautions by the operator.
The gas sample probe is classified for three different temperature classes:
Version
Operating temperature
[°C]
from -20 to 80 °C
[-4 to 176 °F]
ambient temperature
Max.
Surface temperature
[°C]
SP190-H/DIL-EX2 T2
180 [356 °F]
240 [464 °F]
SP190-H/DIL-EX2 T3
155 [311 °F]
180 [356 °F]
SP190-H/DIL-EX2 T4
100 [212 °F]
130 [266 °F]
Table 1 SP190-H/DIL-EX2 T* temperature classification
A one alarm contact (low temperature alarm) is available to monitor the
temperature of the gas sample probe:
•Switching temperature: version SP190-H/DIL-EX2 T2/T3 > 130 °C
[266 °F]
•Switching temperature: version SP190-H/DIL-EX2 T4 >90 °C [194 °F]

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7.1 Serial numbers
The product label with the serial number is located inside the terminal box of the sample probe.
Please refer to this serial number if you have any questions about your sample probe or if you need to
order spare parts or consumables.
7.2 Power supply
The probe can be operated on alternating current in the range of 110 V AC to 240 V AC.

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8 Technical Data
8.1 Gas Sample Probe with Weather Protection Cover
Gas Sample Probe Series SP®
SP190-H/DIL-EX2
T2
SP190-H/DIL-EX2
T3
SP190-H/DIL-EX2
T4
Part No.
02S1960
02S1965
02S1970
Weather protection cover with
insolation
Yes, the probe must not be operated without the weather
protection cover.
Mounting outdoors
Yes
Degree of protection
IP54, EN 60529
Sample temperature
Max. 600 °C* [1112 °F*] The temperature of the process must
not heat the probe beyond the T-Class.
Appropriate heat
decouplings must be provided.
Gas flow
Max. 500 Nl/h
Recommended for dust loadings
Up to 1 g/m3* max.
Filter chamber volume
70 ml
Filter element
S-2K, filter porosity 2 μm, ceramic
Probe heating temperature
160 to 180 °C
[320 to 356 °F]
self-regulating
130 to 160 °C
[266 to 320 °F]
self-regulating
90 to 120 °C
[194 to 248 °F]
self-regulating
Ready for operation
after 2 hours
Temperature alarm contact, alarm
point
< 130 °C [< 266 °F],
NO
< 130 °C [< 266 °F],
NO
< 90 °C [< 194 °F],
NO
Temperature alarm, contact rating
250 V-3 A AC, 30 V-3 A DC
Connection sample outlet diluted
8 mm (DN 6/8) Swagelok tube connector
Connection test gas
6 mm (DN 4/6) Swagelok tube connector with blank plug
Junction box
Fixed mounted junctionl box
Power supply
110 V AC up to 240 V AC 50/60 Hz
Power consumption
Start up: 400 VA, during operation: 100 VA, (fuse 6 A)
Electrical connection terminals
Max. 2.5 mm2, cable fittings 1 x M20 and 1 x M16
Electrical equipment standard
EN 61010, EN 60335-1
Mounting flange
DN65 PN6, form B, stainless steel 316Ti with G3/4"i-
connection
Critical orifice type
a
b
c
d
e
f
g
Dilution rates1)
500:1
200:1
100:1
50:1
30:1
20:1
10:1
Sample flow rate2)
1.4
2.7
5.5
11
19*
28
55
Possibility to adapt the dilution factor
With dilution gas pressure-adjustment -5 % to +30 % 3)

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Gas Sample Probe Series SP®
SP190-H/DIL-EX2
T2
SP190-H/DIL-EX2
T3
SP190-H/DIL-EX2
T4
Dillution gas flow rate with injector
version Ior II
I: 480 – 600 Nl/h*, optional for higher dilution rates
II: 1800-3000 Nl/h
Dilution gas pressure on inlet of
pressure controller
Min. 4.5 bar g, max. 16 bar g
Process pressure
0.9 up to 2 bar abs.
Errors caused by variation in process
temperature
No errors, operation is independent from process
temperature
Errors caused by over or under
pressure
No errors as long as the differential pressure ΔP at the
dilution unit is >0.5 bar g, and test gas is given to the probe
under process pressure conditions while there are no
pressure fluctuations present.
Errors caused by variation in
atmospheric pressure
< 1 % at 50 mbar pressure variation
Ambient temperature
-25 to +60 °C [-13 to 140 °F]
Ex standards used
EN 60079-0:2012 + A11:2013, EN 60079-7:2015, EN 60079-
18:2009
Dimensions (W x H x D)
Dimensions of the weather protection cover: 207 x 260 x
345 mm [≈ 8.15" x 10.24" x 13.58"]
Weight
7.5 kg [≈ 16.53 lbs]
Option
Part No.: 02S9200
Insitu probe tube out of stainless steel 316Ti type SP210/SS,
connection G3/4" o, ø 10/12, length 1 m* [≈ 3.28 ft]
*, incl.
flange gasket.
* Standard, other versions on request.Please specify dilution ratio with your order.
1) Values with injector I (higher dilution rates with injector II between 50:1 and 2000:1 possible),
2) At approx. 3 bar (downstream of supply pressure regulator) dilution gas,
3) -5 % however, not for orifice ‘g’
∆P und T
90
at flow of:
100
200
500
Nl/h
∆P pressure loss with new filter element S-2K:
4
7
15
mbar
T
90
time-with sample tube SP210/SS
4.0
2.5
<1.0
Sec.
Please note: Nl/h and Nl/min refer to the German standard DIN 1343 and are based on these standard conditions: 0 °C [32
°F], 1013 mbar.
8.2 Gas Sample Probe without Weather Protection Cover
Gas Sample Probe Series SP®
SP190-H/DIL-EX2
T2 X
SP190-H/DIL-EX2
T3 X
SP190-H/DIL-EX2
T4 X
Part No.
02S1980
02S1985
02S1990
Weather protection cover with
insolation
No
The probe can only be operated with the weather
protection
cover provided by the customer.

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Gas Sample Probe Series SP®
SP190-H/DIL-EX2
T2 X
SP190-H/DIL-EX2
T3 X
SP190-H/DIL-EX2
T4 X
Mounting outdoors
No
Degree of protection
IP20, EN 60529
The probe can only be operated with the
weather protection
cover provided by the customer.
IP54 must be ensured by the
weather protection cover provided by the customer.
Sample temperature
Max. 600 °C* [1112 °F*] The temperature of the process must
not heat the probe beyond the T-Class.
Appropriate heat
decouplings must be provided.
Gas flow
Max. 500 Nl/h
Recommended for dust loadings
Up to 1 g/m3* max.
Filter chamber volume
70 ml
Filter element
S-2K, filter porosity 2 μm, ceramic
Probe heating temperature
160 to 180 °C
[320 to 356 °F]
self-regulating
130 to 160 °C
[266 to 320 °F]
self-regulating
90 to 120 °C
[194 to 248 °F]
self-regulating
Ready for operation
after 2 hours
Temperature alarm contact, alarm
point
< 130 °C [< 266 °F],
NO
< 130 °C [< 266 °F],
NO
< 90 °C [< 194 °F],
NO
Temperature alarm, contact rating
250 V-3 A AC, 30 V-3 A DC
Connection sample outlet diluted
8 mm (DN 6/8) Swagelok tube connector
Connection test gas
6 mm (DN 4/6) Swagelok tube connector with blank plug
Junction box
Loose wired junction box, cable length approx. 30 cm [≈ 11.8"]
Power supply
110 V AC up to 240 V AC 50/60 Hz
Power consumption
Start up: 400 VA, during operation: 100 VA, (fuse 6 A)
Electrical connection terminals
Max. 2.5 mm2, cable fittings 1 x M20 and 1 x M16
Electrical equipment standard
EN 61010, EN 60335-1
Mounting flange
DN65 PN6, form B, stainless steel 316Ti with G3/4"i-
connection
Critical orifice type
a
b
c
d
e
f
g
Dilution rates1)
500:1
200:1
100:1
50:1
30:1
20:1
10:1
Sample flow rate2)
1.4
2.7
5.5
11
19*
28
55
Possibility to adapt the dilution factor
With dilution gas pressure-adjustment -5 % to +30 % 3)
Dillution gas flow rate with injector
version Ior II
I: 480 – 600 Nl/h*, optional for higher dilution rates
II: 1800-3000 Nl/h
Dilution gas pressure on inlet of
pressure controller
Min. 4.5 bar g, max. 16 bar g
Process pressure
0.9 up to 2 bar abs.
Errors caused by variation in process
temperature
No errors, operation is independent from process
temperature

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Gas Sample Probe Series SP®
SP190-H/DIL-EX2
T2 X
SP190-H/DIL-EX2
T3 X
SP190-H/DIL-EX2
T4 X
Errors caused by over or under
pressure
No errors as long as the differential pressure ΔP at the
dilution unit is >0.5 bar g, and test gas is given to the probe
under process pressure conditions while there are no
pressure fluctuations present.
Errors caused by variation in
atmospheric pressure
< 1 % at 50 mbar pressure variation
Ambient temperature
-25 to +60 °C [-13 to 140 °F]
Ex standards used
EN 60079-0:2012 + A11:2013, EN 60079-7:2015, EN 60079-
18:2009
Dimensions (W x H x D)
Dimensions without junction box: ø 160 x 192 mm [≈ ø 6.3" x
7.6"]
Weight
Approx. 6.5 kg [≈ 14.3 lbs]
Option
Part No.: 02S9200
Insitu probe tube out of stainless steel 316Ti type SP210/SS,
connection G3/4" o, ø 10/12, length 1 m* [≈ 3.28 ft]
*, incl.
flange gasket.
* Standard, other versions on request.Please specify dilution ratio with your order.
1) Values with injector I (higher dilution rates with injector II between 50:1 and 2000:1 possible),
2) At approx. 3 bar (downstream of supply pressure regulator) dilution gas,
3) -5 % however, not for orifice ‘g’
∆P und T
90
at flow of:
100
200
500
Nl/h
∆P pressure loss with new filter element S-2K:
4
7
15
mbar
T
90
time-with sample tube SP210/SS
4.0
2.5
<1.0
Sec.
Please note: Nl/h and Nl/min refer to the German standard DIN 1343 and are based on these standard conditions: 0 °C [32
°F], 1013 mbar.

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9 Applications
The electrically heated M&C dilution probe is applicable for such processes, where the measuring
procedure or the handling of the process gas requires the dilution of the sample respectively the
component to be measured. Typical applications are the use with toxic gases, the moisture
measurement and the emission measurement in flue gases.
The electrically heated M&C gas sample probe SP190-H/DIL-EX2 T* is used for continuous gas
sampling in processes with dust densities of up to 1 g/m³, operating pressure of up to max. 2 bar abs.,
temperatures of up to a maximum of 600 °C [1112 °F] or for high gas humidity. The gas sample probe
SP190-H/DIL-EX2 T* is equipped with a protective cover and can be used for outdoor mounting.
The M&C dilution probe SP190-H/DIL-EX2 T* is based on the M&C gas sample probe SP180-H-EX2
T*.
Do not use the sample gas probe to extract gases or gas compositions,
which could be potentially explosive without the presence of air. Do not
use gases or gas compositions which can alter the relevant safety-
related material properties of the probe materials. The gas or gas
composition needs to be free of particles which could cause, in
combination with the materials of the gas sample probe, sparks by
friction or impact.
This also applies to specific gases or gas compositions, which enter
the gas sample probe via the calibration gas adapter/back purge
connections. Make sure that all gases or gas compositions which enter
the sample gas probe, do not react with the environment or the
process.
Prevent any potential source of ignition (for example burning or
smoldering particles, small smoldering fires, foreign objects) from
entering the gas sample probe during operation.
The type SP190-H/DIL-EX2 T* is not designed to separate the gas
explosion zone without appropriate precautions by the operator.

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10 Dilution principle
The functional principle of the dilution unit is based on ultrasonic flow through a critical orifice (see Fig.
1). The flow through the orifice is constant when the differential pressure via the orifice is higher than
500 mbar. For the atmospheric inlet pressure (PIN = 1020 mbar), this means a pressure at the orifice
outlet (POUT) of less than 520 mbar absolute.
The necessary vacuum at the orifice outlet is produced by an injector operated with dilution gas.
Depending on the critical orifice and injector type, dilution rates can be between 10:1 and 500:1 for
injector I. The table below gives an overview of the dilution factor and sample gas volume using the
injector I (480 – 600 Nl/h):
Orifice type
a
b
c
d
e
f
g
Dilution ratio*
500:1
200:1
100:1
50:1
30:1
20:1
10:1
Volume flow through the orifice [Nl/h]
1.4
2.7
5.5
11
19
28
55
* With injector II 50:1 to 2000:1
Figure 1 Dilution principle
Checking the dilution ratio and excact adjustment of the pressure ratios are descriped in chapter 17.1.
Injector
P
IN
P
OUT
E.g.:
P
IN
= Atmospheric pressure (1020 mbar)
P
OUT
< 520 mbar abs. (low pressure)
⇒Differential pressure at the orifice > 500 mbar
⇒Constant flow
Dilution Gas IN
Critical
Orifice

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11 Description
The sample probes are designed for easy installation, reliable operation and trouble-free maintenance.
Advantages are:
•Gas sampling with dust-laden processes;
•low volume, fast response time;
•filter elements can be changed without tools and without disconnecting the sample line;
•the filter chamber can be easily cleaned;
•the probe tube can be cleaned without dismantling the probe;
•self-regulated electrical heating with under temperature alarm contact, and different probe tubes
and pre-filters as option;
•with calibration gas connection as standard.
The 75 mm [≈2.95"] ceramic filter element with a porosity of 2 µm and a large surface is located in the
heated stainless steel filter housing of the probe. The gas sample probe is heated up to
+120 °C/+160 °C/+180 °C [248 °F/320 °F/356 °F] (see T-class in the technical data) using a special
self-regulated heating element. No thermostat or temperature limiter is necessary. A separate thermo
switch is provided for under temperature monitoring (NO).
The dilution unit including the critical orifice is mounted directly at the heated part of the probe, to avoid
a drop of temperature below the dewpoint at the dilution unit. This keeps the dilution unit at a stable
temperature. The incorporated pre-heater heats up the dilution gas to the probe temperature. The
sample gas probe can be heated up to max. 180 °C [356 °F].
To calibrate a gas analyzer, test gas can enter the probe via the integrated test gas connection.
The necessary dilution gas pressure can be adjusted by the precision pressure controller with
pressure gauge. A vacuum pressure gauge monitors the function of the dilution injectors.
The pressure controller and pressure gauges, necessary for the dilution function, have to be ordered
separately. Set-A will be mounted directly at the probe. The control unit -S will be mounted externally,
and is equipped with an additional shut-off ball valve and a flowmeter to adjust the test gas quantity.
The dilution probe has a standard dilution rate of 10:1 up to 500:1 (injector I). Higher dilution rates of
50:1 to 2000:1 are optional (injector II).
The construction of the probe guarantees an operation which is independent from the process
temperature and pressure (see technical data), and is easy to maintain.

18 SP190-H/DIL-EX2 T* |1.01.00 www.mc-techgroup.com
Figure 2 Gas flow diagram
max.

www.mc-techgroup.com SP190-H/DIL-EX2 T* | 1.01.00 19
12 Probe design
The diluted sample gas outlet at the probe is designed for a 8 mm (DN 6/8) tube.
The optional stainless steel sampling tube of one meter length (Part No.: 02S9200) can be connected
to the G 3/4” thread of the mounting flange. The maximum operating temperature of the stainless steel
sampling tube is 600 °C [1112 °F]. The modular design of our sample probes allows the usage of all
M&C sample tubes and prefilters with G 3/4" connection thread. This guarantees an optimum adaptation
to the process conditions.
The following cross-sectional drawing shows the probe SP190-H/DIL-EX2 T* with weather protection
cover and fixed mounted junction box.
Figure 3 Dimensions and construction: SP190-H/DIL-EX2 T* with weather protection cover
The following figure shows the probe SP190-H/DIL-EX2 T* X without weather protection cover and
with loose wired junction box.

20 SP190-H/DIL-EX2 T* |1.01.00 www.mc-techgroup.com
Figure 4 Dimensions and construction: SP190-H/DIL-EX2 T* X w/o weather protection cover