As part of C960 MFC Gas Mixing software the calibrations for each mass flow controller are supplied for specific gas.  Each mass flow controller has accuracy of 0.2% of full scale, or 0.8% of reading, whichever is greater.  The software provides a checking function for the set gas mixture.  This function looks for errors in the requested gas mixture.  The software will not execute the gas mixture in presence of errors.

G400 Gas Mixing Systems

Key Features:

• Combine up to 9 gases using Qubit’s Mass Flow Controllers.
• Mass Flow Controller Ranges from 0.5 SCCM to +200 SLM.
• Mass Flow Controller accuracy 0.2 % full scale or 0.8% of reading.
• Multiple Alternate Gases may be used with each controller.
• 13 Different gas flow calibrations stored per controller.
• pure or mixed gases used as input gas.
• manual or software control of mixing.
• PC interface provided for software control.

Software:

• Combine 2 to 9 gases automatically.
• Instantaneous provision of required mixture with a mouse click.
• No calibration input required.Intuitive command structure.
• Automated flow implementation based on ratio and total flow.
• Error messages prevent selection out of range.
• Implement one gas mixture and queue the next.
• Store and retrieve settings.

Set up screen for 4 gas mixing system:

References:

• Charilaos Yiotis and Yiannis Manetas. Sinks for photosynthetic electron flow in green petioles and pedicels of Zantedeschia aethiopica: evidence for innately high photorespiration and cyclic electron flow rates. PLANTA Vol 232, Number 2, p523-531 (2010).

The G244 Gas Switcher – 8 channel is designed for use in up to 8 channel gas exchange systems in which gases from up to 8 sample chambers are selected sequentially for analysis.

 In Open Flow Mode the G244 Gas Switcher takes gas from all 8 sample chambers, selects one line for analysis and vents the other lines to the atmosphere. The gas is then either selected for analysis or vented to the atmosphere. In Stop Flow Mode, the switcher seals the sample chambers for a user-defined period. The chambers are then flushed sequentially for gas analysis to provide time-integrated measurements of gas exchange rates. Plumbing the system for either mode is fast and easy.

The C950 Gas Exchange Software controls the G244 Gas Switcher, allowing any channel to be chosen for analysis in any sequence at  user defined frequency. Switching between reference and sample channels results in easy tracking and correction for any incidence of baseline drift. The Gas Switchers can be purchased with optional C250 Gas Switcher Software for stand-alone use. The C250 software provides all the switching functionality of Qubit Systems’ C950 Gas Exchange Software, but allows the switcher to be used in conjunction with any gas exchange system and/or data acquisition software you already possess. The switcher may also be provided with an on-board micro for use without a separate computer.

Each of our instruments is designed so that they can work with gas exchange and data acquisition systems other than those manufactured by Qubit Systems.

The Switcher is also available in a 4 channel version (G243).

The G243 Gas Switcher – 4 channel is designed for use in a 4 channel gas exchange systems in which gases from up to 4 sample chambers are selected sequentially for analysis.

In Open Flow Mode the G243 Gas Switcher takes gas from all sample chambers, selects one line for analysis and vents the other lines to the atmosphere. The gas is then either selected for analysis or vented to the atmosphere. In Stop Flow Mode, the switcher seals the sample chambers for a user-defined period. The chambers are then flushed sequentially for gas analysis to provide time-integrated measurements of gas exchange rates. Plumbing the system for either mode is fast and easy.

C950 Gas Exchange Software controls the G243 Gas switcher, allowing any channel to be chosen for analysis in any sequence at  user defined frequency. Switching between reference and sample channels results in easy tracking and correction for any incidence of baseline drift.

The Gas Switchers can be purchased with optional C250 Gas Switcher Software for stand-alone use. The C250 software provides all the switching functionality of C950 Gas Exchange Software, but allows the switcher to be used in conjunction with any gas exchange system and/or data acquisition software you already possess. The switcher may also be provided with an on-board micro for use without a separate computer.

This instruments is designed so that it can work with gas exchange and data acquisition systems other than those manufactured by Qubit Systems.

The Switcher is also available in an 8 channel version (G244).

ZGMS-150 Gas Mixing System can produce precise mixtures of up to 4 different gasses.   This system was designed for use with Z150 Photobioreactor . The flows of the individual input gases are measured by thermal mass flow meters and adjusted by integrated mass flow controllers.

The ZGMS150 Gas Mixing System mass flow meters and controllers can operate gas flows ranging from few mL/min to tens of L/min. Typically, the controllers of ZGMS-150 operate in the lowest range 0-8 mln/min and in the highest range 0-2500 ml/min. ZGMS- 150 is typically used to control flow of air, carbon dioxide, and nitrogen. Additional gases like nitrogen dioxide, carbon monoxide, methane, ammonia and others can also be added to simulate various technological mixtures or smokestack gasses.

Before the exit connector, the gas mixture is thoroughly homogenized. The input and output gas connectors are of Prestolok type allowing fast and secure connection to a variety of tubes.

One of ZGMS-150 control screens: