Exner EXcell 231 is a high-precision digital NIR absorption sensor for monitoring production processes in the biotech, food and pharmaceutical industries. Its 12mm stainless steel design and wear-free sapphire windows make the EXcell 231 a reliable and intelligent sensor with integrated digital amplifier. Various measuring units for absorbance, turbidity and mass such as EBC / FAU / mg / l / AU / OD or customer-specific units can be output. With the associated EXpert software, the sensor can be conveniently parameterized on the PC and the measurement data can be recorded and graphically displayed. A Modbus RS485 interface and an interface for a 0-20mA output with integrated measured value display are also available. The sensor is attached to the process via a PG13.5 thread. The installation dimensions on the process side correspond to a standardised pH sensor. The EXcell 231 sensor can therefore also be used in conjunction with probe housings and fully automatic cleaning systems.