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Non-dispersive infrared (NDIR) and thermistor
Acoustic intensity
Sensor Mk90: 80 dBa (1 m) max. Central unit Mk9: 80 dBa (1 m) max.
Power supply for the Mk9 central unit
24 V DC
Sensor display
LCD
Central unit screen
128x64 backlit graphics
CO2 measurement range
0-3 % vol.