Theory

• The gas that is finely generated from a reactor will turn into a bubble shape in a BRS cell which is filled with oil.
• Cumulative volume of gas generated is measured by calculating the total amount of gas by fixing the bubble volume and multiplying by the number of bubbles.
• The device can be used for both aerobic and anaerobic operations for wastewater studies.
• The device can be also used for biogas production, biomethane potential (BMP) analysis, or green energy studies (CO₂, CH₄, H₂ and N₂).
• Up to four devices can be connected to a common computer, supporting up to 32 channels.
• The device uses temperature-based calibration to ensure accurate gas measurement.
• After measurements, the time interval of gas production/consumption volume data can be changed by changing Cumulative Time in Data Convert.
• An incubator or a water bath having magnetic stir plate can be used to maintain water temperature (0~50℃).
• Measuring resolution (bubble volume) is very small (0.03 mL for BRS-800).
• Bioreactors having volumes of 125, 250, 500, and 1000 mL can be used.

Specification

	BRS-110	BRS-200	BRS-800
No. of channels	4 channel	4 channel	8 channel
No. of expandable channels	Expandable 16 channels in a computer	Expandable 16 channels in a computer	Expandable 32 channels in a computer
Flowrate	0~1 mL/min	1~5 mL/min	0~0.2 mL/min
Measuring resolution	Approx. 0.03 mL	Approx. 0.15 mL	Approx. 0.03 mL
Measuring interval	1 sec~10 hours(changeable)	1 sec~10 hours(changeable)	1 sec~10 hours(changeable)
Gases	O₂ (OUR), CO₂, CH₄, H₂, and N₂	O₂ (OUR), CO₂, CH₄, H₂, and N₂	O₂ (OUR), CO₂, CH₄, H₂, and N₂
Error	≤2%	≤2%	≤2%
Data output	USB	USB	USB
Power input	DC 12V, 3.5A	DC 12V, 3.5A	DC 12V, 3.5A
Weight	1.7 kg	1.7 kg	1.7 kg
Size	190 mm(W) * 130 mm(D) * 110 mm(H)	200 mm(W) * 140 mm(D) * 120 mm(H)	200 mm(W) * 140 mm(D) * 120 mm(H)
Temperature	0~50℃	0~50℃	0~50℃
Humidity	≤95%	≤95%	≤95%
Material	Aluminum	Aluminum	Aluminum

Examples

Examples of experiments

• Gas production

  

• Biochemical oxygen demand (BOD)

  

• O₂ consumption

  

• Toxicity test with sporeforming bacteria

  

• Hydrogen gas production

  

• Toxicity test with algae

  

Screenshot of BRS program

• Graph

  

• Measurement

  

• Data convert

  

• Setting

  

Applications

• Measurement of oxygen consumption
• Oxygen uptake rate (OUR)
• Toxicity screening
• Biodegradation test
• Treatability assessment
• Laboratory respiration studies
• Soil respiration
• Biogas production
• Repiration of plants/animals
• BMP test
• Biochemical hydrogen potential
• Green energy studies

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