Local Exhaust Ventilation Airflow Indicators

Air Flow Indicators
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Local Exhaust Ventilation Airflow IndicatorsAir Flow Indicators are designed to be used in LEV systems to ensure that the airflow rate in the system is maintained so employees are protected at all times.

Air Flow Indicator Benefits
  • Assists in ensuring adherence to COSHH regulations
  • Easy visual readings (Red = airflow needs to be checked, Green = adequate airflow)
  • Low cost and easy installation
  • Flow rate are maintained resulting in the protection of employees
  • Complete Kit including Hose, and Adapters.
LEV systems are installed to protect workers from exposure to hazardous substances. They should be tested at least once every 12 months in accordance with regulation 9 of COSHH 2002 regulations. To prevent exposure in between these regular tests the latest guidance from the HSE (HSG258) recommends the installation of Air Flow Indicators at every extraction point to visually show the employee that the LEV is adequately controlling the hazardous substances.

The Air Flow Indicators display the vacuum level at the point of extraction. If the level falls into the Red Zone then the airflow will not be extracting the hazardous substance.

As emphasised in the recent COSHH update (Nov 2013), it is the employers responsibility to ensure that the LEV systems are working to a desired level of extraction to maintain that the employees are protected from the hazardous substances at all times. Air Flow Indicators are the simplest way of achieving this with a constant visual check.