CO.20 - On-line Carbon Dioxide Monitor

Carbon dioxide (CO2) measuring unit with graphic display and Varivent mounting

The CO2 Measuring Unit CO.20 serves the Inline / Online CO2 measurement in the brewery and beverage industry.
The measuring principle is based on the ACM continuous partial pressure method; membrane system. The space after a CO2-permeable silicone membrane, fixed in the front of the measuring chamber, is filled with diffusion CO2 until the chamber pressure reaches the partial pressure of the dissolved CO2 in the liquid. At decreasing or increasing CO2 concentration in the liquid, the measuring chamber pressure corresponds. By using up-to-date microprocessor electronics, the current CO2 value is continuously calculated from the determined pressure and temperature values and shown as the actual value in g/l or Vol.

ACM also has a CO2 meter for non-destructive measurement of CO2 content in bottled beverages.


Applications include Breweries, Softdrinks

Features & Benefits

  • The CO.20 is highly accurate, robust and almost maintenance-free.
  • There are no moving parts, and a continuous supply of carrier gas is not necessary. The membrane can easily be exchanged; a change once per year is recommended.
  • ACM CO.20 is fully CIP-able. Longer production stops do not have any impact on the membrane quality. Also there is no need for a gas carrier.
  • A user unit with 5,7″ graphic display is included. Easy handling by self-explanatory symbol keys

  • Mounting: Inline Varivent or bypass
  • Power supply: 24 V DC +/- 20%, 800 mA
  • Compressed air supply: 5 to 7 bar, standard compressed air, dry, oil-free; Plug connection, diameter 8 mm
  • Max. nominal pressure: 10 bar
  • Cleaning: Common CIP, up to 130 °C
  • Measuring range: 0 to 10 Vol. resp. 0 to 20 g/l
  • Accuracy: +/- 0,03 Vol. resp. +/- 0,05 g/l
  • Repsonse time t90: < 5 sec
  • Output signal: RS485, (0)4-20 mA, Profibus DP and DeviceNet