Open-Cathode Stack Tester OBT

Key features

  • Suitable for open-cathode PEM fuel cell stacks
  • Configurations for testing stacks with up to 60 cells
  • Current range up to 300 A
  • Power supply and control of cooling fans
  • Robust system based on industrial PLC with data logging into SQL database
  • Safety features for fully automated operation
  • CE certificate of conformity


Open-cathode fuel cells are very convenient for various applications due to their simple design and low requirements for balance-of-plant components. Well-defined and repeatable conditions of Leancat OBT enable thorough investigation of open-cathode fuel cells also thanks to extensive scripting possibilities.


Maximum power:

1.4 / 2.1 / 3.2 kW

Maximum voltage:

60 V

Inlet gas interface:​

hydrogen, nitrogen

Dead-end mode:

Interface for recirc. pump

Interface for cooling fans:

up to 6

Maximum current:

120 / 180 / 300 A


up to 6

N2 purge:


Cell Voltage Monitoring:

up to 60 channels