EXcell 241 NIR Biomass Sensor DN25

EXcell 241 NIR Biomass Sensor DN25

  • EBC / FAU / mg/l / AU / OD or customer defined units
  • Design for DN 25 weld-in sockets
  • With integrated amplifier
  • No traditional transmitter necessary
  • Wearless sapphire windows, CIP-capable
  • Hygienic design, autoclavable
  • Maintenance free due to LED light source
  • PC-connection via USB, Modbus RS485 or 0…20 mA current output interfaces
  • Easy parametrization via EXpert software

Brand : Exner


EXcell 241 is a high precision digital NIR-absorbance sensor for DN25-weld in sockets monitoring biomass measurement in biotech, food and pharma applications. It´s design made of stainless steel, it´s standard DN25 weld-in socket and wearless sapphire windows, it´s LED technology and the integrated digital amplifier makes them a reliable, robust, cost efficient and unique measuring device for typical industrial fermentation vessels.Different measuring units for absorbance, turbidity and mass like AU / OD / FAU / EBC or mg/l can be displayed or even a customer defined measuring unit can be chosen. The parametrizing software EXpert allows a comfortable and easy sensor parametrization. Also measuring values can be displayed graphically and can be stored and exported. There are different communication interfaces for USB, RS485 Modbus or for 0…20mA current output available. The sensor is attached to the weld-in socket via a G1 1/4″ thread.The O-ring position can be freely selected according to the existing socket to allow the best possible sterile installation.


Measuring range0…6 AU, 0…6600 EBC
Resolution0,1 % or 0,01 AU
Accuracy± 1 %
Reproducibility≤ 1 % from final value
Wave length850 nm
Light sourceLED
Optical path length5 / 10 / 20 mm
Immersion length70-85 mm / 110-125 mm
Wetted materialstainless steel 1.4435 (316L)
SurfaceRa <0.37 µm e-polished
Measuring windowsapphire
Process connectionthread G1 1/4″ (DN 25)
Process temperature0…90 °C
Process pressuremax. 10 bar (150 psi)
Electrical coonectionFischer Core Series
Cable length2 m / 5 m
InterfacesUSB, RS485 Modbus, 0…20 mA with switching output
Protection classIP68


  • High accurate OD measurements up to 12 OD
  • Suitable for fermentation processes
  • Usable in industrial fermentation vessels
  • Cell growth measurement
  • Filter observation
  • Color independent concentration measurement

EXcell 241 NIR Biomass Sensor DN25

Parshvi Technology