To assess occupational exposure to gases, vapours and dusts an operator wears a personal sampler with a suitable sample head located in the breathing zone. The sample is collected during working activity, often over 8 hours. Personal air samplers must be small, lightweight and quiet to be acceptable to the wearer while being robust, reliable and accurate so that the technician can be confident in the quality of the collected sample.

The instruments in the Munro range include simple air samplers designed for dust sampling as well as microprocessor controlled instruments suitable for a wide variety of sampling applications. These samplers are also used for static sampling, for example where the environment in a room or at the boundary of a work area must be sampled.

In order to assess what an individual breathes in during their job, surveys of exposure are conducted using personal samplers. These should be small, light and quiet so operators are not handicapped by the sampler.

While a simple device is suitable for some applications, surveys in potentially explosive atmospheres must be carried out using equipment certified intrinsically safe. Guidance about sampling methods are published by national agencies including H&SE in the UK, OSHA and NIOSH in USA.

 Munro supply air samplers suitable for all these applications.

These basic air samplers use a new diaphragm vacuum pump to ensure a smooth and reliable air flow with a minimum of maintenance. Both have automatic electronic flow compensation to overcome the effects of increasing filter back pressure and to ensure that flow is maintained within ±5% of the desired set point. The AS200 incorporates an accurate elapsed time module with a LCD display, meeting the latest guidance. The ABS enclosure ensures that the internal components are well protected against moisture, dust and chemical ingress. To reduce weight and improve battery life we have incorporated nickel metal hydride batteries which are more "environmentally friendly" than some other types. We offer single and five channel standard battery chargers. Munro offers a full range of accessories to complement the instrument, including Filter holders, filters cyclones, asbestos heads, IOM heads and Arnold bubblers as well as specialised devices to fractionate the particulate.