top of page


The Low Cost, Easy Fit, Airflow Monitor

Ideal for Schools Fume Cupboards & Workplace LEV Systems

  • Small Compact Design
  • Battery Powered
  • HSE HSG258 COSHH Compliant
  • Flexible Mounting Options

The latest Airflow monitor by Fumair Ltd

The FlowBug airflow monitor is simple to install due to its feather like138g weight, its simple 2 x AA battery power, and upto 10 meters of flexible small diameter hose.

Ideal for schools who want a low cost option to show their ducted fume cupboards are safe to use. The FlowBug requires no electrical connection and can be fitted and calibrated within 10minutes. With a simple display, and no on/off button it is a reliable indicator for the classroom and the prep room. 

Battery Life

The 2 x AA batteries will last a minimum of 14 months. However it has been know for the batteries to last over 2 years. This is with constant use.

We recommend the batteries are changed yearly as part of the LEV systems or Fume Cupboards compulsory inspection.

Airflow Monitor
Airflow Monitor

Essential for LEV's in the workplace. In order to comply with HSE requirements all LEV's require an accurate, reliable indicator for the user to know the if the LEV is safe to use.


Traditionally this has involved expensive airflow monitors designed for fume cupboards or pressure gauges that are not always clear and require many different gauge ranges depending on the pressure readings inside the LEV duct.

The FlowBug is a one product fits all product with its ability to read a wide range of static pressures, and can be calibrated to show a failed airflow at -20% of calibrated pressure (also +50% of the calibrated pressure in certain applications if required)

Do I need an Airflow Monitor?

HSE’s LEV FAQ section of their website statesthere isn’t a specific legal requirement to have airflow indicators fitted to an extraction. But as an employer you do by law have to make sure that your LEV system keeps working properly.

Other than testing before using and LEV you need some form of reliable indicator that the Lev is functioning correctly, as Employee's have a duty to report any defects "forthwith" to the employer. There needs to be some reliable method to inform the employee of a defect such as a blockage or broken duct in the system.


This is where some form of airflow indicator is needed.

You can download a very useful article regarding Airflow monitors and the law here courtesy of Bill Cassells of Oxyl8 Ltd, who trains LEV inspectors to the P600 standards for BoHS.

bottom of page