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Airflow Indicators for LEV Systems

Airflow indicators are designed to be used in LEV systems to ensure that the air flow rate in the system is maintained so employees are protected at all times.

Airflow indicator benefits include:

  • Easy visual readings (cross = airflow to be checked, arrow = adequate airflow)
  • Limits operational downtime
  • Assists in ensuring adherence to COSHH regulations
  • Low price and easy installation
  • Flow rates are maintained resulting in protection of employees

LEV systems are installed to protect workers from exposure to hazardous substances. They should be tested at least once every 14 months by competent people in accordance with Regulation 9 of COSHH 2002 Regulations. To prevent possible exposure between the regular tests, it is imperative that the operator has an indication that the LEV system is working within control parameters. The simplest form of indication is to install airflow indicators at each extraction point, which is recommended in HSG258, the latest guidance on LEV from the HSE (Health & Safety Executive).

 Airflow indicator on fume extraction arm


Impact Technical Services will survey your system to determine control parameters and then supply and fit suitable indicators showing safe and unsafe ranges directly to the operator, so that rectification of the problem can be made. 

Visit our other LEV related pages:

LEV testing

LEV System Design & Installation


Find out more from the HSE here:

HSE HSG258 Controlling airborne contaminants at work

COSHH 2002 Regulation 9: Maintenance

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