CH2O (Model AL4021) Continuous Formaldehyde Monitor

The Aero-Laser formaldehyde monitor AL4021 is an extremely sensitive chemical analyser, based on the Hantzsch (acetyl- acetone) reaction [1]. It features the detection of formaldehyde down to lowest concentrations of 100ppt (parts per trillion) for gaseous samples, and 150ng/liter (eq. 2×10 molar) for liquid samples, respectively. The -9 complete chemical processing,  including gas stripping, is integrated into the instrument. Using a fluorimetric detection method, the instrument achieves an extraordinary selectivity, avoiding interferences of other chemical substances in the sample gas or liquid.

The AL4021 can be calibrated semi-automatically by using liquid formaldehyde standards or automatically, using an optional integrated standard gas generator, based on a permeation tube. Contrary to other highly sensitive formaldehydemonitoringmethods, the instrument has a delay time of only a fewminutes and a time resolution of 90 seconds.

Originally designed for environmental and climate research, the AL4021 became a major  instrument in the field of formaldehyde emission monitoring of products based on wood, plastics or fibres, within the last years.

AL4021 Features

  • Continuous online monitoring of formaldehyde emissions with unique sensitivity of 100ppt
  • Analysis of gaseous and liquid samples with only one instrument
  • Designed for climate research, environmental air monitoring and indoor air quality control
  • Ideal for emission control of wood-, plastic,- and fabric based products
  • Can be employed together with up to 16 emission test chambers

All Aero-Laser analysers are sold with 1 years parts warranty as STANDARD.

The warranty can, at additional cost, be extended for total peace of mind. Please call to discuss options for this.

Aero-Laser analysers require periodic service and maintenance to both satisfy the requirements of the warranty and to ensure that the highest possible data capture rates are maintained.

Enviro Technology has a large team of in-house and field based service engineers who regularly receive “factory training” and can provide the very best levels of service and support.

Enviro Technology and Aero-Laser recommend that the AL4021 Continuous Formaldehyde Monitor is serviced every 6 months of continuous operation.

A wide range of servicing options are available and can include:

- Pre-scheduled on-site planned maintenance (every 6 months).

- Emergency on-site call-out within agreed timescales (i.e. 48 hours).

- Supply of consumable items (i.e. sample inlet filters).

- Supply of calibration gases and permeation tubes.

- Supply of permeation tube calibrators and zero air generators

- Remote analyser “health-checks” and diagnostics.

- Return-to-base servicing options.

- Local site operation services.

- Data collection and data management services.

Please contact either our sales or customer services teams to request a quotation for on going servicing and maintenance on this analyser.


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