Tandem Gas Analysers
Real-time off-gas analysis of CO₂ and O₂
On-line, real-time CO₂ and O₂ off-gas analysis for microbial and cell-culture bioprocesses — standardised data across all your reactors, compatible with a wide range of bioreactors, and fully customisable to your requirements.
CO₂ & O₂
Gases measured
Real-time
On-line data
4–12 lines
PRO & Multiplex
OUR · CPR · RQ
Calculated
0–45 °C
Operating temp
Integrates
0–10 V · 4–20 mA · RS232
Why choose Tandem Gas Analysers?
Deeper process insight
Understand cell-culture behaviour live, during operation.
Reliable & repeatable
Improved monitoring for consistent, reproducible results.
Automated control
Drive process control from real-time off-gas feedback.
Standardised data
Consistent off-gas data across every reactor.
Specifications
| Gases measured | CO₂ and O₂ |
|---|---|
| CO₂ technology | Infra-red absorption |
| O₂ technology | Electrochemical |
| Resolution | 0.01% |
| Accuracy | ±2% of full scale |
| Drift | < 0.05% per month of full scale |
| Response time (T90) | CO₂ < 50 s · O₂ < 10 s |
| Operating temperature | 0–45 °C |
| Flow rate | 25–1000 ml/min (combined) |
| Outputs | Dual 0–10 V, 4–20 mA + RS232 |
| Models | PRO (single line) · Multiplex (4/6/8/12 lines) |
Integration & models
The Tandem connects to a wide range of bioreactor platforms, standardising off-gas data across all your reactors.
- Two models — PRO (single continuous line) and Multiplex (4, 6, 8 or 12 lines with user-definable sampling)
- Real-time CO₂ and O₂ analysis for microbial and cell-culture work
- Calculates oxygen uptake rate (OUR), carbon dioxide production rate (CPR) and respiration quotient (RQ)
- Compatible with the H.E.L bioreactor range — BioXplorer 100, BioXplorer 400, BioXplorer 400P, BioXplorer 5000 — and systems from other manufacturers
- Connects via dual 0–10 V and 4–20 mA outputs plus RS232
Applications
Frequently asked questions
What does the Tandem gas analyser measure?
Real-time, on-line CO₂ and O₂ concentrations in bioreactor off-gas, for microbial and cell-culture experiments.
What does it calculate?
From the off-gas data it derives oxygen uptake rate (OUR), carbon dioxide production rate (CPR) and respiration quotient (RQ).
What bioreactors is it compatible with?
The full H.E.L BioXplorer range and systems from other manufacturers — it connects via dual 0–10 V and 4–20 mA outputs plus RS232.
What is the difference between PRO and Multiplex?
PRO analyses a single continuous line; Multiplex handles 4, 6, 8 or 12 lines with user-definable sampling, standardising data across multiple reactors.
How fast is the response?
T90 response is under 50 seconds for CO₂ and under 10 seconds for O₂.
Related reading
Explore the bioprocess range
BioXplorer 100Parallel screening in as little as 50 mLView →
BioXplorer 400Parallel screening, up to 400 mLView →
BioXplorer 400XLExtended screening — 8 × 400 mLView →
BioXplorer 400PHigh-pressure screening, up to 10 barView →
BioXplorer 5000Single-bioreactor scale-up, 1–5 LView →
BioVISInline, non-invasive cell-density monitoringView →Ready to accelerate your research?
Talk to a bioprocess specialist about your application.
