Acetaldehyde, Methanol, & Benzene in CO2 Applications


The BevAlert Model 8900 provides direct measurement of Acetaldehyde, Methanol, and Benzene (AMB) in Carbon Dioxide.

The instrument is utilized by Specialty Gas Manufacturers and the Food and Beverage Industry to monitor trace impurities in CO2 used in carbonated beverages.

The BevAlert Model 8900 employs a photoionization detector (PID). The AMB in the gas sample are physically separated using proprietary GC columns. A dual-column configuration with timed backflush to vent is used to strip off


Measurement of AMB in beverage grade carbon dioxide

  • Direct measurement of Acetaldehyde, Methanol, and Benzene in Carbon Dioxide
  • Interference free response
  • Automatic baseline adjustment for long-term stability
  • Automatic calibration
  • Analog output ranges are user selectable
  • Concentration and diagnostic alarm relays
  • Graphic display of current or historical concentrations
  • Multipoint sampling options
  • RS-232 and optional LAN
Analysis Time <360 seconds
Detector PID (High-sensitivity PID Optional)
Column Capillary
Oven Temperature 100ÂșC, Nominal
Carrier Gas Nitrogen, 15 cc/min, Nominal
Lower Detection Limit <50ppb Acetaldehyde, <2ppm Methanol, <2ppb Benzene
Accuracy 1% of Full-scale
Precision 2% of Measured Value
Span Drift (24HR) <2% of Full-scale
Sample Flow Rate 250 – 500 cc/min, typical
Output Analog: (5) 0-20ma or 4-20ma loop power supplied, isolated. Selectable for: gas concentration, unintegrated detector signal. Options for up to 16 additional programmable 0-20ma, 4-20ma or voltage outputs: 0-1V, 0-5V, or 0-10V.
Digital: RS-232, optional Local Area Network
Relays (5) User programmable relays for concentration and diagnostic alarms (1A @ 30Vdc). Options for up to 32 additional relays available.
Inputs Optional digital input board for 3 contact closure inputs. Supports start analysis, start calibration, and analyze calibration gas sample.