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Presens SFR (Shake Flask Reader)

Oxygen and pH monitoring in shake flasks (Erlenmeyer flask), cultivation tubes, and T-flasks

The SFR Shake Flask Reader monitors oxygen and pH in up to 9 Erlenmeyer flasks, cultivation tubes, or T-flasks simultaneously. It fits in nearly all standard shakers. Measurement data is transferred wirelessly via Bluetooth to your PC / notebook.

The  corresponding ready-to-use vessels contain pre-calibrated sensor spots. The system monitors non-invasively through the transparent bottom of the vessels. Different types and sizes of flasks and tubes are available. Plastic, disposable flasks contain pre-calibrated oxygen and pH sensors. Glass flasks are equipped with autoclavable oxygen sensors only, and can be re-used.


  • Rapid, parallel online monitoring of up to 63 shake flasks
  • For microbial cultivation and cell culture
  • Pre-calibrated cultivation vessels are ready-to-use
  • Compatible with standard shakers
  • Glass & plastic flasks in different sizes available
  • Non-invasive measurement
  • Used in seed train & bioprocess development

SFR Gallery

  • Media evaluation and optimization
  • Wireless data transfer
  • Compatible with standard shakers
  • For microbial cultivations & cell culture