The Dust Scan Directional Dust Gauge and monitoring system is a 'passive' method that does not need a power supply. It Samples all sizes of ambient dust and is ideal for nuisance dust monitoring. It can be used in any location wherte dust movement occurs and can help to detect dust path-ways and potential nuisance. Directional Gauges are used at quarries, landfills, opencast coal sites , demolition and construction sites, materials stockpiles and recycling plants.
Gauge intallations are discreet and unobtrusive and are made for ease of installation and operation. They can be installed and used by most site staff after basic training.
The directional Gauge uses a special adhesive dust collection slide (sticky pad) which is mounted on a cylindrical monitoring head. The monitoring head fits onto a 2-metre stand. The monitoring head collects fugitive dust coming from 360 degrees around the gauge. Directional Gauges are ideal for monitoring dust movements around site boundries.

The DS5 is a new concept in particulate monitoring, providing a low-cost flexible solution to ambient dust monitoring designed primarily for outdoor use.

The system incorporates 2 separate monitoring technologies;

1. The DustScan direction nuisance dust gauge.

2. A battery powered filter reference PM10 or PM2.5 sampler.

The directional monitor, as a passive system, requires no power and sampling heads only need changing on a weekly basis. The battery pack supplied with the filter reference sampler is designed to power the internal pump and logger for a full week to coincide with routine filter and directional gauge changes.

Deposit gauges are a simple yet accurate methods of measuring deposited dust from the atmosphere. Airborne dust is deposited into a capture container mounted horizontally, or in the case of the directional gauge, into one of four vertical collection tubes. The dust remains in these containers or is washed through the system by natural means, (i.e. precipitation) into a collection bottle at the base. Samples are then measured by washing the collection area with distilled water, and then passing this water through a pre-weighed and conditioned filter, (normally 9cm) under suction. Any foam used (as in the ‘Frisbee’ type sampler) is then also washed in distilled water and passed through the same filter. The filter is again conditioned and weighed. The ‘Frisbee’ dust deposit gauge uses a dry foam trap to reduce any sample contamination (e.g. from falling leaves). The sample, along with up to 120mm of rain, is collected in a large capacity HDPE collection bottle, positioned at the base of the unit. The gauge is also fitted with a stainless steel and nylon bird guard to avoid extraneous contamination. A tripod is supplied which can be inserted into the ground to give the gauge extra stability. This type of gauge is generally accepted to have the greatest sampling efficiency of those available.

The BS 1747 Directional Dust Gauge uses four tubular samplers mounted in a way to distinguish between dust from the four cardinal compass points. The dust collected in each of the four samplers is gravimetrically analysed to give a dust concentration from each direction. This unit is especially useful if information is required as to the source of pollutant dust at a particular location.

The Deposit Dust Gauge is the simplest of all the deposit gauges as it uses a single container mounted at the top of a pole.

Applicable Standards, BS1747.

Part number 151151A non-IS logging,
Range 0-25mg/m³ and 0-250mg/m³.
True real time dust and particulate monitor, forward light scattering method, Average, current and maximum levels calcualated, internal data logger stores up to 30,000 readings. Field calibration with standard optical insert filter at 35 mg/m³.
Measurement of particle sizes 0.1 to 12 microns, purging bellows included for cleaning.


Extended Description

The Microdust Pro real time particulate monitor covers entire measurement range of 0- 2500mg/m³. Internal logger can store up to 15,700 data points over 32 seperate runs. Logging interval can be set from one second to 10 minutes. A 5 minute interval gives a logging time of 50 days. Instrument can be operated on mains or battery. LCD display gives graphical or numerical display in real time as well as TWA and max concentrations.


Extended Description