BioProTT FlowSU System

PSG BioTechThe BioProTT™ FlowSU System is an BioProTT™ FlowSU Systeminnovative flow measurement solution for single-use biopharmaceutical applications. Suitable for both upstream or downstream processes, the ultrasonic flow meter consists of a reusable transmitter and a disposable flow sensor for the integration into single use tubing assemblies.

The approach of “Ready. Connect. Flow.” is driven by the ease of integration, smart connection to a host system or pump, and a reliable, highly accurate flow measurement that is low maintenance and features no obstructions within the flow path. An integrated air and bubble detection adds further safety to the overall process.


In upstream processes such as buffer and media preparation or cell cultivation, the BioProTT™ FlowSU can provide feedback to a pump or dose feeding processes.

In downstream applications such as depth filtration, tangential flow filtration, in-line buffer formulation, or chromatography, the BioProTT™ FlowSU can be used to hygienically and precisely measure the flow. The flow meter can be easily integrated inline and be combined with different pump types such as the Quattroflow® Single Use Pumps. The integrated air and bubble detection adds safety to air-sensitive applications.

Key Facts

  • Straight flow path and ultrasonic transit time principle for cell and media integrity
  • 2% accuracy without individual calibration due to standardization
  • On-site adjustment feature to improve performance on-site
  • Scalability: all sensor sizes (1/4" to 1") are fully compatible with the same electronics: Size is automatically recognized upon connection
  • Tool-less attachment of single-use sensor with special locking technology
  •  USP class VI material (polycarbonate) and gamma-stable up to 50 kGy
  • Manufactured in an ISO 13485 environment and packaged under ISO 7 clean room conditions 
  • Standard hose barb connections 
  • Adjustable air and bubble sensitivity 
  • Selectable flow averaging rate 
  • Integrated web interface for configuration (password protected)
OEM Version:
  • Stainless steel panel mount transmitter
  • CE and UL certified
  • Integrated electronics and Status LED
  • PoE with no cables at the front
  • ModBus TCP Interface equal to the BioProTT™ FlowMCP


Accuracy of 175 BioProTT FlowSU Sensor 1/2"

Fig. 1: In total 175 FlowSU 1/2" were tested with water at 21°C.
All sensors were within the defined specification without an individual calibration of each sensor.

Accuracy before and after gamma irradiation

Fig. 2: Comparison of the accuracy of the BioProTT™ FlowSU System 1/2" before and after gamma irradiation (50 kGy). The curves represent the mean over 25 samples tested.