RITTER MilliGascounter Type MGC-1
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RITTER MilliGascounter® Type MGC-1
Models
The MGC is available in the following casing/measurement cell materials:
(from left to right: casing material/measurement cell material) PMMA/PVDF, PVDF/PVDF, PVC-red/ PVC-red.
The RITTER MilliGascounter®
Type MGC-1
Applications Measurement Principle with Advantages compared to
The MilliGascounter (1) (MGC) Schematic other Systems
is designed for the volumetric The gas to be measured flows ભ Individual volumetric calibration
measurement of the smallest through the gas inlet nozzle 3 and of each MGC traceable to National
amounts of gas with ultra-low flow micro capillary tube 9 within the Primary Standard
rates. It is suitable for measurement base plate into the casing of the ભ Total gas production measured
of all inert, slightly corrosive gases MGC which is filled with a packing (instead of Methane only)
such as biogas (PMMA model) and
liquid !2. The gas rises as small
ભ Head space volume of fermenta-
aggressive gases (PVDF model). tion bottle at measurement start
bubbles through the packing liquid
Furthermore, it can be used for (= air) not erroneously measured
and is collected in the measurement
volumetric leak detection. as pure methane volume
cell !3.
The measurement cell consists of
ભ No false readings due to CO2
absorption by combination of
two measuring chambers, which
2 acidulated packing liquid and
are filled successively by the rising
1 software correction (more: www.
www.ritter.de
gas bubbles. When a measuring
3 ritter.de/en/products/milligas-
12345678 chamber is filled, the buoyancy of counters)
4
10 the filled chamber causes the mea-
surement cell to tip over abruptly. Measuring-Range
11 The second measuring chamber The minimum flow rate is theo-
then begins to fill and the first one retically zero ltr/h as there are no
13 is emptied at the same time. The mechanical limitations with the MGC
tipping of the measurement cell which would define a minimum flow.
12
9 triggers a pulse by means of the However, at such micro flow rates
permanent magnet !1 and the reed there are external influences
contact !0 which is registered by becoming evident: temperature and
the counter unit 1. For external pressure variation, tightness of the
data logging (PC) the switching hose connection, permeability of
pulses of the second reed contact the gas inlet hose. Therefore, the
(1)
Developed at the University of can be obtained via the signal minimum flow rate was defined to
Applied Sciences Hamburg, 1 ml/h. The maximum flow rate is
output socket 2. The measured gas
Prof. Dr. Paul A. Scherer 1.0 ltr/h.
exhausts through the gas output
nozzle 4.
Performance Specifications
Minimum flow rate Qmin 1 ml/h Measuring accuracy (2) ±3 / ±1 %
Maximum flow rate Qmax 1 ltr/h Display accuracy (3)
0.01 ml
Measurement cell volume,
Minimum gas inlet pressure 8 mbar 3 ml
approx.
Maximum gas inlet pressure 100 mbar Packing liquid quantity, approx. 120 ml
Gas inlet pressure Operating temperature (4)
+10 ~ +60/+80/+40 °C
8 mbar
at measurement start Connection gas in-/outlet PVDF screw-type tube connection
(2)
Without / with software »RIGAMO« across the whole measurement range.
(3)
For display of volume corrected by calibration factor with 2 decimals.
(4)
Max. Operating temperature for PMMA/PVDF/PVC
Apparatebau
123456.12
109
Ø98
1 Counter unit with LCD display / 2 Signal output socket (reed contact) / 3 Gas inlet / 4 Gas outlet
5 Air-vent screw for filling / 6 Gas inlet channel / 7 Casing / 8 Base plate / 9 Micro capillary tube
!0 Two reed contacts / !1 Permanent magnet / !2 Packing liquid / !3 Measurement cell (tilting body) with twin-chambers
!4 Tracing screw for liquid level / !5 Inspection screw gas inlet channel
Display, Signal Output Standard Equipment Accessories
The volume of the measured gas is ભ Electronic counter / display ભ Software »RIGAMO«
displayed on the electronic digital ભ Cleaning rod for micro capillary for data acquisition by PC
display located on top of the MGC ભ Signal output (reed contact), ભ Packing liquid:
casing. Additionally a floating reed floating output, 0.1 sec., 100 / 500 / 1,000 ml
contact can be used as a signal max. load 100 V/DC / 0.33 A ભ Additional gas connection tubing
output. ભ Twin measuring chamber Tube material:
ભ 200 ml packing liquid · PVC with PMMA & PVC casing
Accuracy ભ 1.5 m connection tubing · PTFE with PVDF casing
Because of the physical measure- Tube material:
ment principle, the measurement · PVC with PMMA & PVC casing
error is dependent on the flow rate · PTFE with PVDF casing
and it rates ±3% across the full flow ભ Connection gas in-/outlet:
rate range. Each MGC is individually PVDF screw-type tube coupling
calibrated at the standard flow rate Ø 4i / 6o mm
of 0.5 ltr/h so that the measurement
error is approx. 0% at this flow rate.
At minimum flow rate the measure-
ment error is approximately +3%,
at maximum flow rate approximate-
ly -3%. The »RIGAMO« software
(available as accessory) provides
an algorithm which automatically
recalculates the actual measure-
ment data into the real volume at
the respective actual flow rate on
the basis of the calibration curve.
The remaining error is smaller
than ±1% across the full flow rate
Multiple MilliGascounters
range. The volume is measured
connected to a Biogas
with a resolution of approximately Batch Fermentation
3 ml equivalent to the volume of the System. More info:
measurement cell. https://www.ritterde/en/
products/biogas-batch-
fermentation-system
Subject to alterations.
Dr.-Ing. RITTER Apparatebau
GmbH & Co. KG
Coloniastr. 19-23
D-44892 Bochum
Germany
„Worldwide –
Tel +49-234-92293-0 with the precision
Fax +49-234-92293-50
mailbox@ritter.de
of the original! “
www.ritter.de
»You can reach more than
75 RITTER distribution partners
directly through our website!«
www.ritter.de
Rev 2021-03
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