- 1 Basic Elements BBFS-18
- 2 Components for CO₂ Absorption (Option)
- 3 More Options
- 4 Small Parts (always included)
- 5 Gas Analysis (Option)
Basic Elements BBFS-18

- Suitable for max. 18 x 0.5 / 1.0 / 2.0 ltr PMMA Fermentation Bottles
- Air circulation by 2 powerful fans for homogeneous heat distribution
- Control panel with LCD display for digital temperature setting, increment 1°C
- Integrated mainboard for operation of stirring units
- RJ12 interface for bus line to the »SIM« signal interface module for controlling the oven temperature and speed/interval operation of the stirring devices (with RIGAMO V4.x)
Dimensions | W 750 mm x D 750 mm x H 300 mm | Weight 39.0 kg |

- Suitable for simple and compact installation of max. 18 MilliGascounters and 18 optional CO₂absorption bottles
- Frame made of aluminium, shelves made of stainless steel 1.4571
Rack for BBFS-18 | Dimensions W 810 mm x D 370 mm x H 950 mm | Weight 13.5 Kg |

Features
- Wheeled table for setting up the heating oven for fermentation system BBFS-18
- Total height incl. standing heating oven = standard height laboratory tables (920 mm)
Design
- Table frame with 4 lockable wheels
- 1 additional storage compartment below the heating oven
- Suitable for holding the movable rack for the installation of MilliGascounters and absorption bottles
Materials
- Frame made of aluminium profiles, table plates made of PE-blue
Table for BBFS-18 | Dimensions W 820 mm x D 720 mm x H 620 mm |

Feature highlights
- Absolute gas-tight by magnetic coupling between stirring motor and stirring blade
- Various bottle sizes: 0.5 / 1 / 2 ltr – custom sizes on request
- High breaking strength by PMMA material (no fragile glass gas outlet nozzle)
- Custom stirring blades available
Technical Data
- Stirring speed adjustable from 1 to 30 r/min *
- Interval stirring with freely selectable interval times *
- Suitable for media with low and high viscosity (≤ 450 mm2/sec)
- Temperature range: 10 – 55 °C
- Max. pressure: 100 mbar
- Material fermentation bottle: PMMA crystal-clear
- 2 connection ports: 1 x gas outlet, 1 x purging of heads space or sample taking, PVDF screw-type tube connection for tube Øi 4 mm, Øo 6 mm
* with »RIGAMO« V4.x software

Type: MGC-1 PMMA / Material: Casing PMMA, measurement cell PVDF
- Measuring range: 1 ml/h to 1 ltr/h
- Measuring accuracy: ±3% across the whole flow rate range (better ±1% with »RIGAMO« software by dynamic correction of measurement errors)
- Including individual calibration certificate
- Volume measurement cell: 3 ml
- Equipment: Digital display, 200 ml packing liquid, 1.5 m connection tube, cleaning tool, syringe and bubble level (1 piece each for up to max. 5 pc.)
- Resolution (= min. measurement increment): 3 ml
- Max. operating temperature 60 °C
- Max. overpressure: 100 mbar
PMMA / PVDF | Dimensions ø 96 mm x H 112 mm | Weight 475 g |
For a detailed description see RITTER MilliGascounters and data sheet »MilliGascounter MGC-1 PMMA«.

Overview
- Types: 1-/3-/9-/18-Channel
- Central interface module for RITTER Biogas Batch Fermentation System BBFS V4.x
Functions
- Data transmission of gas volume and temperature of a RITTER Gas Meter
- Normalisation (temperature and pressure compensation) of gas volume and volume flow
- Data transmission for temperature control of the Heating Oven
- Data transmission for stirrer control of the Fermentation Bottles
- Conversion of data into USB signals for connection to PC
Components for CO₂ Absorption (Option)

- CO₂ absorption rate better than 99%
- CO₂ absorption capacities: See Data Sheet »CO₂ Absorption Bottle«
- With unique dip pipe design and Screw-type tube coupling
- Including tubing to PMMA Fermentation Bottle and to MilliGascounter øi 4 mm / øo 6 mm
- Volume 250 ml, ø D 95 mm x H 106 mm

Absorption solution
- 3-molar caustic potash solution (KOH 3 mol/ltr in aqua dest.)
- Filling quantity per absorption bottle: 250 ml
- Delivery in bottles of 1 ltr
More Options

Features
- Wheeled table for setting up the heating oven for fermentation system BBFS-09
- Total height incl. standing heating oven = standard height laboratory tables (920 mm)
Design
- Table frame with 4 lockable wheels
- 1 additional storage compartment below the heating oven
- Suitable for holding the movable rack for the installation of MilliGascounters and absorption bottles
Materials
- Frame made of aluminium profiles, table plates made of PE-blue
Table for BBFS-09 | Dimensions W 570 mm x D 570 mm x H 620 mm |

- Multiple measurement cells in one unit
- Cells are measuring independently of each other
- Gas in/outlet for each cell
- Calibration certificate for each cell
- Compensation of temperature *
- Compensation of pressure *
- Compensation of humidity *

- 1 x Connection for gas outlet port, PVDF screw-type tube connection øi 4 mm, øo 6 mm
- 1 x Connection for flushing of headspace or sample extraction, PVDF screw-type tube connection øi 4 mm, øo 6 mm
- Various bottle sizes: 0.5 / 1 / 2 ltr - custom sizes on request
- High breaking strength due to PMMA material (without fragile glass gas outlet nozzle)
0.5 ltr | Dimensions ø H 110 mm x D 105 mm | Weight 0.25 kg |
1.0 ltr | Dimensions ø H 190 mm x D 105 mm | Weight 0.4 kg |
2.0 ltr | Dimensions ø H 350 mm x D 105 mm | Weight 0.7 kg |

- Incl. magnetic coupling for absolute gas tightness of fermentation bottle
- With intervalic stirring (1 min / 1 min)
- Suitable for media with low and high viscosity ≤ 450 mm²/sec (≙ 65 sec capillary flow cup 6 mm DIN EN ISO 2431)
- Step motor 2 ampere, 15 rpm
- Custom stirring blades available
0.5 ltr | Dimensions of stirring blade | W 80 mm x H 45 mm | Weight ~ 0.7 kg |
1.0 ltr | Dimensions of stirring blade | W 80 mm x H 125 mm | Weight ~ 0.7 kg |
2.0 ltr | Dimensions of stirring blade | W 80 mm x H 285 mm | Weight ~ 0.7 kg |

The RITTER Biogas Batch Fermentation System (BBFS) allows the world-wide unique combination of:
- biogas fermentation tests
- data acquisition of volume and flow rate
- gas analysis of CH₄ and CO₂ as an option
… from up to 18 gas sources.
For this purpose, 9 high-precision RITTER »MultiGas« NDIR (non-dispersive infrared) Sensors are installed in one casing. Up to 2 casings can be attached to the rack the Biogas Batch Fermentation System (BBFS), enabling the analysis of biogas and many other gases in research and development labs.
V 1.0 / Rev. 2024-09-05 / Subject to alterations.
https://www.ritter.de/en/data-sheets/multigas-sensors-for-bbfs/
Dr.-Ing. RITTER Apparatebau GmbH & Co. KG · Coloniastrasse 19-23 · D-44892 Bochum · Germany
For questions please contact mailbox@ritter.de or your local distribution partner (on our overview page)
Small Parts (always included)

Filter 0.45 micron with 2 tube nozzles
- 1 filter per MilliGascounter
- Incl. tube nozzles for tube øi 4 mm / øo 6 mm
- Materials: Housing Acrylic, filter element PTFE, tube nozzles Polypropylene
- Function: Filtering of particles in gas flow to avoid blockade of micro capillary of MilliGascounter
- Easy mounting in tubing in front of check valve

Check valve with 2 tube nozzles
- 1 check valve per MilliGascounter
- Incl. tube nozzles for tube øi 4 mm / øo 6 mm
- Materials: Housing PC, valve body Silicone, tube nozzles Polypropylene
- Function: Prevents reverse flow* of …
- … packing liquid into Fermentation Bottle when used with MilliGascounter
- … absorption liquid into Fermentation Bottle when used with CO₂ Absorption Bottle
- Easy mounting in tubing behind filter and in front of MilliGascounter
Gas Analysis (Option)

The RITTER Biogas Batch Fermentation System (BBFS) allows the world-wide unique combination of: … from up to 18 gas sources. For this purpose, 9 high-precision RITTER »MultiGas« NDIR (non-dispersive infrared) Sensors are installed in one casing. Up to 2 casings can be attached to the rack the Biogas Batch Fermentation System (BBFS), enabling the analysis of biogas and many other gases in research and development labs.
V 1.0 / Rev. 2024-09-05 / Subject to alterations.
https://www.ritter.de/en/data-sheets/multigas-sensors-for-bbfs/
Dr.-Ing. RITTER Apparatebau GmbH & Co. KG · Coloniastrasse 19-23 · D-44892 Bochum · Germany
For questions please contact mailbox@ritter.de or your local distribution partner (on our overview page)