Manual CO₂ Mixer

It allows to generate COB_2B-Air mixtures with an adjustable COB_2B concentration in the range 0-15%.  Air and COB_2B flows are regulated by two floating ball flow meters in the range 0.2 1.7 Nl/min and 0.013 0.13 Nl/min, respectively.

Digital CO₂ Controller

It allows to generate a CO₂-Air mixture with an adjustable CO₂ concentration in the range 0-20%, with an accuracy of ± 5% of CO2  concentration, for instance, if CO2 set point is 5%, accuracy is  ± 0.25% . The air flow is regulated by a floating ball air flow meter in the range 0.2 0.8 Nl/min.

Sensing Technology

A CO₂ infrared sensor continuously measures CO₂ concentration in the mixed gas stream and a PID closed loop controller gives feedback to a fine valve regulating CO₂ flow. Measured value of CO₂ concentration is displayed in real time in green . An alarm can be set on CO₂ concentration, so that, if CO₂ concentration goes below such value, display color turns red and a buzzer turns on.

Data Storage

The serial RS-232 interface and the CO₂ Control Software allow the user to control the unit with a personal computer and to acquire and store concentration data in computer memory.