77 Series Desktop Instruments

• Measurement of oxygen concentration is possible even in still water, it is possible to make pinpoint measurement and to draw a distribution map of oxygen concentration even in small water volume
• Large size graphic LCD readout
• Oxygen semiautomatic calibration in the open air
• Memory unit for 15 000 measured values
• Real time unit
• Two way RS 232 communications
• Analogue output
• Human - instrument communication via dialog strips
• Password protected configuration setting
• Automatic temperature compensation
• Automatic compensation of pressure and salt content dependence

Instruments work with CSOT 43 sensors. The extremely low oxygen consumption of these sensors leads to a lower demand for oxygen input into the electrode, which means a lower velocity of measured water. The sensor can actually work in any condition without additional mixing. The difference of measuring in an ideally mixed water sample and in the same sample without mixing is 5% of the measured value at 25°C. This property enables pinpoint measurement and measurement of oxygen profile even in the smallest water volume.
The measured value is automatically corrected for temperature and barometric pressure. The instrument also enables automatic compensation for the total salt volume in the water according to standard EN 25814.
Semiautomatic single point calibration in the open air (in the calibration unit or cover) is easy and exact.