Bartec HYGROPHIL H 4230-10 A Series User manual

BARTEC BENKE GmbH Schulstraße 30 D-94239 Gotteszell Telefon [phone] Telefax [phone]
E-Mail: [e-mail] Internet: www.bartec-benke.de
HYGROPHIL®H 4230-10 Serie A
Operating Instructions
Software Version 2.00
BA 030520

Contents
C - 1
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
Table of Contents
1System description .........................................................................................................................1
1.1 Task and fields of use...................................................................................................1
1.2 Measurement principle .................................................................................................2
1.3 Structure of the humidity measurement system ...........................................................2
1.3.1 Measuring chamber......................................................................................................4
1.3.2 Ejector...........................................................................................................................5
1.3.3 Hose pump....................................................................................................................5
1.3.4 Water detector ..............................................................................................................5
1.3.5 Control and evaluation electronics................................................................................5
1.3.6 Controls and displays ...................................................................................................6
1.3.6.1 Keys..............................................................................................................................6
1.3.6.2 Signal lamps .................................................................................................................9
1.3.6.3 Display..........................................................................................................................9
1.3.7 Interfaces......................................................................................................................9
1.3.8 Temperature sensors..................................................................................................10
1.3.9 Gas sampling hose.....................................................................................................10
1.3.10 Connection for external water detector.......................................................................10
1.3.11 Filter............................................................................................................................10
1.4 Technical data.............................................................................................................11
1.5Details when ordering.................................................................................................13
1.5.1 Basic equipment .........................................................................................................13
1.5.2 Accessories.................................................................................................................13
1.5.3 Spare parts .................................................................................................................26
1.5.4 Individual parts for measuring chamber .....................................................................29
1.5.5 Consumables..............................................................................................................30
2Safety precautions ........................................................................................................................31
2.1 General information ....................................................................................................31
2.2 Equipment-specific instructions..................................................................................31
2.3 Installation location .....................................................................................................32
2.4 Electrical connection...................................................................................................32
2.5 Operating the equipment ............................................................................................33
2.6 Explosion protection ...................................................................................................33
3Installation......................................................................................................................................34
3.1 Wall mounting.............................................................................................................35
3.2 Mobile use...................................................................................................................36
3.3 Connection instructions ..............................................................................................37
3.3.1 Assignment of terminals .............................................................................................37
3.3.2 Mains connection........................................................................................................37
3.3.3 Temperature sensors..................................................................................................38
3.3.4 Analogue outputs........................................................................................................38
3.3.5 Warning- / ERROR contact.........................................................................................38
3.3.6 PROFIBUS..................................................................................................................39
3.4 Mounting the gas sampling hose................................................................................40
3.4.1 Mounting instructions..................................................................................................40
3.4.2 Mounting sequence ....................................................................................................42
3.4.3 Electrical connection...................................................................................................42
3.5 Assembly of removal / filter flanges............................................................................43
3.6 Compressed air connection........................................................................................44
3.6.1 Mounting sequence ....................................................................................................46
3.6.2 Setting the ejector’s operating pressure.....................................................................47
3.7 Filling the water storage tank......................................................................................48
3.8 External water detector...............................................................................................49
3.8.1 Electrical connection...................................................................................................49
3.8.2 Installation...................................................................................................................50

Contents
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Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
3.9 Installation with enclosure type 4230-119..................................................................51
3.9.1 Mounting the gas sampling hose ...............................................................................54
3.9.2 Panel heater...............................................................................................................55
3.9.3 Heated hose incl. change-over gate, Type 4230-112................................................57
4Operation.......................................................................................................................................58
4.1 Start-up.......................................................................................................................58
4.2 Operating mode..........................................................................................................58
4.3 Configuration..............................................................................................................58
4.4 Changing the slave address.......................................................................................59
5Programming.................................................................................................................................60
5.1 General notes.............................................................................................................60
5.1.1 Interaction...................................................................................................................60
5.1.2 Programming process................................................................................................61
5.2 Changing the program parameters............................................................................63
5.2.1 Programming the analogue outputs...........................................................................63
5.2.2 Programming the hose heating parameters...............................................................64
5.2.3 Programming the pump control..................................................................................65
5.2.4 Programming the equipment configuration................................................................66
5.2.4.1 Temperature sensors.................................................................................................66
5.2.4.2 Safety switch-off („TIMEOUT”)...................................................................................66
5.2.4.3 Water detector............................................................................................................67
5.2.4.4 Hose heating controller ..............................................................................................67
5.2.4.5 Compressed air control..............................................................................................68
5.2.4.6 Reference pressure....................................................................................................69
5.2.4.7 Sensor calibration.......................................................................................................69
5.2.5 Limit monitoring..........................................................................................................70
6Maintenance..................................................................................................................................71
6.1 General information....................................................................................................71
6.2 Testing the analogue outputs.....................................................................................71
6.3 Measuring chamber ...................................................................................................72
6.3.1 Cleaning interval.........................................................................................................72
6.3.2 Types of dirt................................................................................................................72
6.3.3 Disassembling the measuring chamber.....................................................................73
6.3.4 Dismantling the measuring chamber..........................................................................77
6.3.5 Changing the humid temperature sensor...................................................................79
6.3.6 Changing the dry temperature sensor .......................................................................80
6.3.7 Cleaning the measuring chamber..............................................................................81
6.3.8 Assembling the measuring chamber..........................................................................84
6.4 Internal water detector ...............................................................................................86
6.5 Water pump................................................................................................................87
6.6 Gas sampling hose.....................................................................................................88
6.7 Compressed air conditioner .......................................................................................88
6.7.1 Emptying the condensate separator ..........................................................................88
6.7.2 Cleaning the filter .......................................................................................................89
6.8 Changing fuses ..........................................................................................................91
6.9 Replacing the Display-/ Profibus-board .....................................................................92
6.10 Replacing the electronics board.................................................................................93
6.11 Replacing the proportional valve................................................................................95
6.12 Reference and zero point control (EN15267-3) .........................................................96
7Error and warning messages ......................................................................................................97
8PROFIBUS ...................................................................................................................................101
8.1 Framework structure ................................................................................................101
8.2 Standby mode..........................................................................................................102
8.3 Channel description .................................................................................................103
8.3.1 Service channel........................................................................................................103

Contents
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Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
8.3.2 Measured value channel...........................................................................................104
8.3.3 Arithmetic value channel...........................................................................................105
8.3.4 Output channel..........................................................................................................106
8.3.5 1-channel parameters...............................................................................................108
8.3.6 2-channel parameters...............................................................................................110
8.4 Examples..................................................................................................................114
8.4.1 Reading from HYGROPHIL H ..................................................................................114
8.4.2 Writing to HYGROPHIL H.........................................................................................115

Contents
C - 4
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
Change history
Date
Chapter
Description
19.07.2018
General
Complement „Serie A“
19.07.2018
6.12
New added
All rights reserved. Subject to change without prior notice.
No part of this document may be reproduced, processed or distributed
in any form or by any means without the prior written permission of
BARTEC BENKE
Copyright © 2018 by
BARTEC BENKE
Schulstraße 30
D-94239 Gotteszell
Document / Version:
BA 030520
Software Version 2.00
Valid from / Author:
20.05.2003
G. Rothe
Revised at/ by:
11.10.2018
K. Hacker
Translation:
H. Dean, EXACT! Mannheim

System description
1
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1 System description
1.1 Task and fields of use
HYGROPHIL® H 4230 is a measuring system for determining the amount of
water vapour in air and other gases.
In many processes, monitoring and controlling gas humidity is a must if you
want to achieve a consistently high product quality, use energy efficiently
and adhere to the regulations regarding emission limits.
HYGROPHIL®H 4230 is a special measuring unit for measuring humidity
under extreme measuring conditions such as:
●High measurement gas temperatures
●Gas humidity up to saturation
●Significant contamination in the form of dust, oil, grease, external gas and
solvents, also in highly corrosive form.
Being a high-end device, HYGROPHIL®H 4230 is particularly suitable for
continuous industrial use.
HYGROPHIL®H 4230 also makes it possible to measure humidity in
processes during which this is otherwise not continuously possible or can
only be done using laboratory methods, if at all.
HYGROPHIL®H 4230 uses a microprocessor to calculate all humidity-
related variables in various scales and, in addition, to automatically monitor
the unit itself. As a result, maintenance is minimized.
Thanks to its special features, HYGROPHIL®H 4230 can be used in places
where other measuring systems fail due to unfavourable ambient conditions.
Examples include:
●Flue gas measurement in power stations
●Flue gas measurement in incineration plants, even before filtering
●Fabric processing facilities
●Hot-air tunnels for preparing fast food
●Ovens
●Roasting facilities
●Copper extraction facilities, even subject to contamination by sulphuric
acid
●All types of raw material dryers
●Sintering facilities for ores
The response rate of the measuring system guarantees that an appropriate
closed-loop control can be operated in all application cases.
Task
Fields of use

System description
2
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.2 Measurement principle
HYGROPHIL®H 4230 works in accordance with the principle of
psychrometric gas humidity measurement, measuring the difference in
temperature between two measurement sensors. The difference in
temperature results from the fact that one of the two temperature sensors is
moistened. Heat is removed from it by means of evaporation. Using the
difference between the „humid temperature“ and the „dry temperature“ it is
possible to determine various humidity measurement variables precisely
based on fixed mathematical relations. This measurement principle gives
rise to a high degree of precision and reproducibility, corresponds to the
secondary standard method in accordance with DIN 50012 and does not
require any calibration. It is one of the most reliable methods used to
measure gas humidity.
Usually, however, this measurement procedure is subject to limits if the gas
temperature exceeds 100 °C or if the gas to be measured is impure. On a
conventional type of humidity sensor, deposits have a detrimental effect on
the evaporation rate and falsify the measurement result.
These limitations are eliminated in this measuring unit that has been further
developed to form an „impact jet psychrometer“. The system can be used for
an extended period of time without failure even at high temperatures and
high humidity levels and for highly polluted or aggressive gases.
1.3 Structure of the humidity
measurement system
The measuring chamber and the electronics unit are accommodated in a
divided stainless steel enclosure, each with a door that can be opened
separately.
The water tank is attached to the exterior of the enclosure.

System description
3
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
Gas sampling hose
Connecting cable for hose heating
Water container
Measuring chamber enclosure
Electronics enclosure
Compressed air maintenance unit

System description
4
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.3.1 Measuring chamber
The venturi system and the water cylinder with the humidity sensors are
accommodated in the measuring chamber.
To begin with, the air to be measured flows through a venturi nozzle, in
which the gas flow rate is determined by measuring the difference in
pressure. Located close to the nozzle is a sensor that measures the dry
temperature. When it leaves the nozzle, the air takes the form of a laminar
jet, referred to as the impact jet, and hits the water surface of the measuring
cell. The sensor that measures the humid temperature (HT) is positioned at
the centre of the measuring cell. The temperature values that are recorded
are made available to the electronics unit and further processed there.
The measuring cell is constantly fed with water from the storage tank by a
hose pump. The water level in the measuring cell is monitored by a sensor.
The pressure in the measuring chamber is likewise measured using a
sensor. It is used to correct the measurement results and monitor the
equipment. The measuring chamber is followed by the ejector. Currents of
air are used here to create negative pressure in order to pump the
measurement gas through the system. The pumping rate of the ejector is
controlled using a proportional valve, with the help of the gas flow rate
measurement in the venturi nozzle. As a result, the gas flow rate remains
constant at around 14 l/min.
Excess water, together with the measurement gas and compressed drive air,
is pumped out of the equipment via the ejector. It leaves the equipment
through a connection at the bottom.

System description
5
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.3.2 Ejector
The lower section of the measuring chamber contains the ejector, an air jet
pump that pumps the measurement air through the measuring chamber by
means of compressed air. Negative pressure of up to -200 hPa is allowed at
the extraction point. By controlling the compressed air that is fed, the gas
flow rate is kept constant at 14 standard litres per minute. The actuator is a
proportional valve controlled by pulse width modulation. The actual-value
sensor is the venturi system in the upper section of the measuring chamber
in connection with a differential-pressure sensor.
1.3.3 Hose pump
The hose pump propels the water from the storage tank into the measuring
cell. The pump’s delivery rate is regulated in such a way that part of the
water flows out of the cylinder.
1.3.4 Water detector
The water detector uses a capacitive proximity switch to make sure that the
water level in the measuring cell remains correct.
1.3.5 Control and evaluation electronics
The signals for dry temperature, humid temperature, differential pressure
and measuring chamber pressure are passed to the electronics unit, where
a microprocessor is used to calculate the desired humidity measurement
variables and monitor the equipment’s functions.
The following measurement variables are recorded or calculated by the
electronics unit and can be displayed and saved on the PC:
●Dry temperature TT
●Humid temperature HT
●Absolute pressure SP
●Differential pressure P
●Auxiliary temperatures T1external (via ext. temperature sensor)
Tinternal (for compensating HT)
●Dew-point temperature DT
●Absolute humidity MH
●Specific humidity SH
●Volumetric water vapour content Vol%
●Partial water vapour pressure VP
●Enthalpy h
●Saturation deficit DVP
●Relative humidity for T1external RH
The following monitoring and control functions are carried out:
●Open-loop control of the proportional valve for regulating air flow rate
●Closed-loop control of the gas sampling hose temperature
●Monitoring and verification of
• Water level internal, option: external
• Air flow rate
• Temperature sensors
• Adherence to the measurement range at outlets
• Gas sampling hose temperature
• Plausibility of calculation results
Variables calculated
Variables measured

System description
6
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.3.6 Controls and displays
When the enclosure door on the right is opened, the operator panel
becomes accessible, together with its display, signal lamps and operating
keys.
1.3.6.1 Keys
The measurement variables are displayed by simply pressing a key. The
keys that can be pressed to display the measurement variables are labelled
appropriately. Several keys are also assigned to numbers or other
characters. This double assignment is needed in programming mode.
Display
Keys
Signal lamps

System description
7
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
Display of the dry temperature of the incoming gas (corresponds to the gas
sampling hose temperature)
Display of the humid temperature of the incoming gas
Display of the dew-point temperature of the gas to be measured
Display of the volumetric water vapour content
Display of the current partial water vapour pressure of the gas to be
measured
Display of the absolute humidity of the gas to be measured
Display of the specific humidity of the gas to be measured
Display of the enthalpy of the gas to be measured
Display of the saturation deficit of the gas to be measured
Display of the absolute pressure in the measuring chamber
Display of the relative external humidity (RHexternal) (only if T1external is defined)
Display of the differential pressure (pressure difference in the venturi nozzle)
TT
1
HT
2
DT
3
VOL%
4
VP
5
MH
6
SH
7
H
8
DVP
9
SP
–
RH
0
P
,

System description
8
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
Display of the temperature value of T1external (only if T1external is activated)
Backlighting ON/OFF
Display of the proportional valve regulation ratio
Display of the internal temperature (Tint)
Standby (the pump speed is decreased by a factor of 10, while the setpoint
value for the differential pressure is fixed)
Key for changing the slave address and displaying the baud rate
Test function for analogue outputs
Delete value in programming mode
Confirmation key in programming mode
Start programming mode
Interrupt or continue bus operation
Trigger a software reset
F5
F6
CLEAR
ENTER
PROG
LOCAL
RESET
F1
F2
F3
F4
F7

System description
9
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.3.6.2 Signal lamps
For the purpose of signalling various operating states, the panel contains six
fields with symbols and a signal lamp for each.
The heating (gas sampling hose) is switched on (red)
The water pump is in operation (red)
The proportional valve is opening (red)
The proportional valve is closing (red)
A warn- or error message is present (red)
The PROFIBUS is exchanging data (green)
1.3.6.3 Display
The display is made up of two rows and is backlit.
The measurement variables called using the keyboard are displayed
together with their dimensions in the bottom line. The top line shows the
operating status or error messages, depending on the current conditions.
During programming, the display is used for interaction with the user.
Appropriate displays, messages and questions are displayed. The line at the
top shows the menu that is open, while the line at the bottom shows the
function to be programmed or a value to be changed.
1.3.7 Interfaces
Two electrically isolated analogue current outputs are available for the
purpose of evaluating and processing the measured values.
You can allocate any humidity measurement variables or auxiliary variables
to these outputs as you wish.
You are free to define the limits of the measurement ranges within the
respective overall measurement range as you wish (see 5.2.1).
The analogue outputs are constantly monitored to ascertain whether the
current measured value lies within the respective measurement range that
has been programmed. If there are deviations, a fault is reported.
In addition, one of the two analogue current outputs can be monitored to
ascertain whether it adheres to a minimum value and maximum value.
Once they have been switched on, the outputs remain at 0 until the normal
operating conditions are reached.
If a fault is reported during measurement operation, the outputs are fixed at
the value that they had directly before the fault report appeared.
Field bus interface (PROFIBUS DP).
All measured values can also be recorded using the field bus interface. In
addition, the system can be configured using this interface.
Field bus interface
Two analogue outputs

System description
10
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.3.8 Temperature sensors
The internal temperature sensor, Tinternal, is built into the enclosure as a fixed
element.
It is used for compensating the humid temperature.
For measuring temperature-dependent humidity variables (such as relative
humidity (RH) or enthalpy (h)), you have the option of installing an external
temperature sensor (T1external). This must be placed in the position where the
humidity variable is to be measured.
1.3.9 Gas sampling hose
The gas humidity is not measured within the respective system. Rather, the
gas is extracted from there and pumped to the HYGROPHIL system via a
connecting line. It is essential that no water vapour condenses within the
connecting line as this would falsify the measurement result and could
possibly lead to operating problems. In order to prevent this, the temperature
of this line (and of the entire suction apparatus) must be kept above the
maximum dew-point temperature to be expected.
To this end, a gas sampling hose is used and its temperature is
automatically kept constant. At the same time, the dry temperature sensor is
used as the actual-value sensor. By programming the dry temperature (TT),
therefore, you also specify the gas sampling hose temperature.
1.3.10 Connection for external water detector
An external water detector is available as an optional extra for monitoring the
level in the water storage tank.
1.3.11 Filter
HYGROPHIL®H 4230 is highly insensitive to dirt. It is recommended that a
filter is set at the extraction site in order to extend the maintenance intervals
of the measurement chamber.
If required, please ask our expert consultants to select a suitable filter.

System description
11
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.4 Technical data
Humidity measurement
Measurement principle
Psychrometric gas humidity measurement in line with the impact jet method
Transducer
PT 100/ 4-conductor in accordance with DIN IEC 751
Computational accuracy
0.01%
Computing time
Approx. 2s (for a sudden change in VOL% from 0 to 40%)
Settling time
t90 = <170s (bei VOL%-Sprung von 0 auf 40%)
Air/gas flow rate
Max. 15,5 standard liters/min.
Water intake
Max. 25 ml/h (hose pump)
Water reserve
2l (enough for approx. 3 days) or 11l
Compressed air intake
2...6 bar max. air consumption 1200 standard liters/h
at negative pressure <25 mbar
Measured variable inputs
Measured variable
Measurement range
Resolution
Accuracy
Type
Dry temperature TT
0...140 °C
0.1 °C
0.5% of the
measurement
range
Primary
Humid temperature HT
0...140 °C
Temperature T1external (optional)
0...200 °C
Absolute pressure SP
500...1500 hPa
1 hPa
1%
Differential pressure DP
100…999 Pa
1 Pa
1%
Dew-point temperature DT
20...100 °C
0.1 °C
Calculated
Volumetric content H2O Vol%
2...100 %
0.1 %
Absolute humidity MH
15...1000 g/kg
1 g/kg
Specific humidity SH
15...1000 g/kg
1 g/kg
Enthalpy h
35...1000 kJ/kg
1 kJ/kg
Current vapour pressure VP
10...1000 hPa
1 hPa
Saturation deficit DVP
0...1000 hPa
1 hPa
Outputs
Signal output
Analogue output
2 electrically isolated output channels, can be assigned to each of the measurement
ranges, spread, error behaviour programmable
Output signal
0…20 mA or 4…20 mA (programmable), linear
Permissible load
500 
Accuracy
0.2% of the associated measured value
Inputs
External water detector
24 V d.c., NPN
T1external
PT 100/ 4-conductor in accordance with DIN IEC 751
Data interface
Field bus interface
PROFIBUS DP
Electrical data
Auxiliary power
Measuring unit: 90…264 V a.c., 47...63 Hz, approx. 30 VA
Gas sampling hose: 230 V or 115 V a.c.; approx. 100 VA/m
Relay
Warning relay
Display of warnings Load: 1 A/24 V d.c., at least 10 mA
ERROR relay
Display of failures Load: 1 A/24 V d.c., at least 10 mA
Ambient conditions
Permitted working temperature
+5...+50 °C with enclosure 4230-119 for Ex Zone 22: -20 °C ...+50 °C
Permitted storage temperature
-20...+70 °C (without water)
Climate category
KWF in accordance with DIN 40040
Reference conditions
23 °C 2 °C / 230V ± 2%

System description
12
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
Mechanical data
Enclosure
Stainless steel enclosure; protection rating IP64 in accordance with DIN 40050
Dimensions
450410150 mm (without mount)
Assembly drill holes
347x330 mm, 47x13mm (M6)
Weight
Approx. 12.5 kg
Connections
Electrical connection
Screw terminals 0.5-1.5 mm2; cable feed via M 16x1.5 cable gland
Compressed air supply
Plug nipple NW 7
Gas sampling hose connection
Special connection
Dimensions
Assembly drill holes
alternativ
11 Liter

System description
13
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
1.5 Details when ordering
1.5.1 Basic equipment
HYGROPHIL H Type 4230-10
Corrosion-proof, 115/230 V a.c.
Scope of delivery: HYGROPHIL-H in accordance with order number; 1 litre of surfactant
Order number: 202728
1.5.2 Accessories
Gas sampling hose, Type 4230-100
Flexible, water-resistant gas sampling hose for feeding measurement gas without condensate (max. input
temperature 200 °C); Including 1 mount per metre;
Operating voltage: 230 V a.c. or 115 V a.c.
Connection type: Universal conical nipple G3/8” DKR DIN3863
Length
Order number (230 V)
Order number (115 V)
1,0 m
202729
1,3 m
289818
2,0 m
216375
3,0 m
202727
4,0 m
216376
5,0 m
216377 (100 W/m)
6,0 m
290074
7,0 m
232553
306255
8,0 m
365576
(50 W/m)
10,0 m
294604
302536
12,0 m
233793
292338
14,0 m
423733
16,0 m
281348 (60 W/m)
Gas sampling hose (Hastelloy)
2,0 m
292910 (100 W/m)
12,0 m
371852 (100 W/m)
Gas sampling hose Type 4230-114 Ex Zone 2/22
Flexible, water-resistant gas sampling hose for feeding measurement gas without condensate (max. input
temperature 120 °C); Including 1 mount per metre
Operating voltage: a.c. 230 V or a.c. 115 V.
Connection type: Universal conical nipple G3/8” DKR DIN3863
Length
Order number (230 V)
Order number (115 V)
4,0 m
321356
Order numbers for 115 V version on request
6,0 m
321357
10,0 m
279259
12,0 m
241974
15,0 m
300500

System description
14
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
Measurement gas tube, Type 4200-06
Connection type: Universal conical nipple G 3/8“ DKR DIN3863
PT 100
Length
Order number (230 V)
13,0 m
U7521113420006
15,0 m
U7521115420006
19,0 m
202222
20,0 m
U7521120420006
23,0 m
U7521123420006
24,0 m
320764
26,0 m
220718
Temperature Controller TRM/20, 0-200°C
Order number: 314300
Measurement gas tube with switching valve, Type 4230-112
Length 2,5m Order number: 283058
Length 12m Order number: 423734
(230 V AC)
Terminal block Typ 4230-134
for connecting Measurement gas tube with switch
Order number: 368952