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Automated analytical tool preferred by scientists and engineers for anaerobic fermentation test


- the standard tool for academic research

The Automatic Methane Potential Test System (AMPTS®) II has become the research-standard analytical tool for anaerobic batch fermentation testing.

Automated, fully integrated and with easy access to sampling, analysis, recording and report generation, AMPTS® II can house 15 glass reactors for tests. These include biochemical methane potential (BMP) tests, anaerobic biodegradability studies, specific methanogenic activity (SMA) assays and residual gas potential (RGP) analyses on digested slurry.

AMPTS® II lets you determine the optimal retention time and mix of substrates for co-digestion, screen proper pre-treatment methods and evaluate the need for additives.

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AMPTS® II offers you:

  • Highly precise and accurate data
  • Significant reduction in time consumption and labour requirement
  • Standardised measurement procedures, data interpretations and reports
  • User-friendly operation with remote access

Get highly precise and accurate data​

AMPTS® II gives you a better understanding of the dynamic degradation behaviour of a specific substrate. It satisfies the highest demands for data accuracy and precision for various anaerobic batch fermentation tests.

Reduce labour and skill demands

Automating analytical procedures reduces labour and skill requirements for carrying out methane potential tests compared to traditional methods.

Outstanding real-time performance

The multi-channel analyser, consisting of 15 reactors and gas volume meters as well as a built-in data acquisition system, enables real-time investigation of a large number of samples.

Real-time temperature and pressure compensation minimise the impact of measurement conditions and standardise data presentation.

Standardise and compare results from any lab – anywhere

AMPTS® II gives easy, instant access to ongoing experiments and reports from a remote location, saving lots of time and effort. It allows you to standardise measurement procedures, data interpretation and reports, and normalise data (i.e., 0 ˚C, 1 atm and dry conditions).

Automatically removes gas overestimation

Methane gas overestimation arises from flushing the system with an inert gas, such as nitrogen. Biogas produced from the anaerobic fermentation will push the remaining inert gas out from the reactor headspace and the inert gas can mistakenly be counted as methane gas. This means a possible overestimation of methane gas production by as much as 20–30 percent depending upon the total volume of gas production and headspace volume of the test vial. AMPTS® II calculates and removes this overestimation, providing for more accurate and reliable data.

Stable, reliable operation

AMPTS® II software runs on an embedded ARM CPU to give unmatched stability, data protection and minimum downtime. The AMPTS® web-based software application makes setting up and monitoring experiments as easy as possible.

Total control throughout the experiment

Get optimal control of all reactors and batch experiments at all times with a simple click of a virtual button from the software user interface.

Monitor from your smartphone or tablet

AMPTS® II uses standard TCP/IP protocols and can easily be added to an internal network, and secured by a user-definable password. This enables monitoring through any smartphone or tablet. The analytical capacity can be easily expended by connecting multiple instruments using a network switch. With this feature, each AMPTS® II can be operated as stand-alone device or connected in parallel depending on your needs.

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AMPTS® has been on the market since 2009. It has become the preferred analytical instrument for conducting BMP and other anaerobic batch fermentation tests in the biogas sector. Our statistics show a continuous growth of scientific publications utilising AMPTS® series. By the end of 2019, we have identified more than 600 scientific publications in English using data from AMPTS® series and plenty more in other languages. In recent years, we have also seen an increasing number of standards and laboratory protocols using AMPTS® II as the standard apparatus including the German VDI 4630, the SMA test protocol, the sludge activity test and standard protocol for determination of biohydrogen potential.

During 2017 and 2018, BPC Instruments participated in two international inter-laboratory studies that included over 40 laboratories from 14 countries in Europe. Result from both inter-laboratory studies was presented publically at a pre-conference meeting during the IWA Anaerobic Digestion Congress in Delft 2019 and is also available now in the article “Improving inter-laboratory reproducibility in measurement of biochemical methane potential (BMP)”, AMPTS® II was recognised as the most trustable and reliable automated instruments for BMP analysis. The precision of measurement and data calculations have been validated with the highest quality and standards by scientists in international inter-laboratory BMP studies..

Dr. Jing Liu

(former Bioprocess Control)


Online course for wastewater treatment

On-line course for “Experimental methods in wastewater treatment“ produced by TU Delft (The Netherlands)

Authors: Mark C.M. van Loosdrecht, Per HalkJær Nielsen, Carlos M. Lopez-Vazquez and Damir Brdjanovic

Publisher: IWA Publishing

AMPTS® II is used as the recommended experimental platform to demonstrate the execution of the biomethane potential (BMP) and specific methanogenic activity (SMA) analyses.


Scientific reference on sludge activity test

Article title: “Determination of sludge activity using automated biomethane potential test equipment”

Author: Associate Prof. Bernadette McCabe

National Centre for Engineering in Agriculture, University Southern Queensland (Australia)

40th Annual WIOA, Queensland Water Industry Operations Conference and Exhibition (2015)

The paper provides an overview of the various methods that exist and an insight into sludge activity analysis using AMPTS® and its application in determining sludge activity treating high strength abattoir wastewater.


German norm for BMP test

VDI 4630 (2016-11): Fermentation of organic materials – characterization of the substrate, sampling, collection of material data, fermentation tests: batch fermentation tests and continuous fermentation tests.

Publisher: The Association of German Engineers 

The VDI 4630 standard provides rules and specifications for tests to determine the biogas output of organic materials which serve the interpretation and operational optimisation of biogas plants. Thus, it gives comprehensive and practice relevant support for the determination of the biogas orientation of organic materials. AMPTS® is recommended as the only automated test apparatus for biochemical methane potential (BMP) tests based on the batch test procedures in this standard.


Scientific reference for BMP test

Article title: “Improving inter-laboratory reproducibility in measurement of biochemical methane potential (BMP)”

Authors: S. D. Hafner, H. F. de Laclos, K. Koch, C. Holliger, Water (2020) 12, 1752

Result from two international inter-laboratory studies that include over 40 laboratories from 14 countries in Europe demonstrates AMPTS® II is recognised as the most trustable and reliable automated instruments for biomethane potential (BMP) analysis.




Learn more about AMPTS® II.

Operation and Maintenance Manual


Tech Specifications


Software & System

  • Software application specially designed for biochemcial methane potential and other anaerobic batch fermentation tests
  • Web-based software running on an embedded server
  • Online real-time gas flow and volume display
  • Automatic real-time pressure and temperature compensation
  • Real-time gas flow and volume normalisation
  • Algorithm to avoid overestimation of gas flow and volume that may be introduced by flush gas during experiment setup
  • Possibility of multiplexing, allowing for simultaneous batch analysis at different startup times
  • User-friendly guidelines for experiment setup
  • On-line system logger for operational diagnosis

Power supply: 12V DC / 5A (Flow cell array and DAQ unit); 24V DC /2.7A (mechanical agitation)

Usage: indoor


For more information, see Demo or the user manual.


Flow cell array and DAQ unit

Working principle: liquid displacement and buoyancy. Up to 15 cells running in parallel with built-in pressure and temperature sensor
Measurement resolution: 9 ml
Detection capacity: up to 900 l cumulative gas for each batch test
Measuring range: 1 to 6000 ml/h for 9 ml flow cell (integrated data acquisition)
Dimension: 51 x 44 x 18 cm
Housing: plastic
Measuring precision: CV ≤ 1%

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Ex-situ carbon dioxide absorption unit

Carbon dioxide trap bottles: 15
Volume of carbon dioxide trap bottles: 100 ml
Dimension of unit: 44 x 30 x 6 cm
Absorption liquid: 3 M NaOH with pH indicator, 80 ml per bottle (not included)
Absorption efficiency: >98%

Please refer to the accessories section for individual article number of components in the carbon dioxide absorption unit.


Sample incubation unit

Maximum number of reactors per system: 15
Reactor material: glass
Standard reactor volume: 500 ml
Dimension of unit: 59 x 34 x 28 cm
Temperature control: up to 95 °C (203 °F) (precision of 0.2 °C)
Mixing of reactors: Multifunctional agitation system with brushless DC motors for long-life operation. Remote speed and on/off control via AMPTS® II software control interface. Manually adjustable direction and time interval, as well as timer function to set time periods for reversal. Modular design for low maintenance. Rotating speed range: 10-200 rpm.

Please refer to the accessories section for individual article number of components in the sample incubation unit.