ET's Vehicle Emissions Monitoring Cabilities

1. Enviro Technology
Vehicle Emissions
Monitoring Services
ACCUSCAN 4600 REMOTE SENSING SYSTEM
With an ever-growing number
of large and small vehicles
commuting to and from our towns
and cities every day, never has
vehicle emissions monitoring been
such a priority for local authorities.
Whether it is to determine the percentage of high-
polluting vehicles using the roads in order to drive
road traffic and air quality strategy, or to highlight
pollution ‘hot spots’ for the implementation of low
emissions zones, we at Enviro Technology have the
vehicle emissions monitoring technology that will
ensure you receive intelligent data quickly,
accurately and cost-effectively.
We introduce to you the Accuscan 4600
Vehicle Emissions Monitoring System.
The new benchmark in cost-effective
air quality monitoring
www.et.co.uk

2. Vehicle Emissions Monitoring Services
How does Accuscan work?
The Accuscan 4600 system measures vehicle emissions
in real time by using optical gas and particulate
monitoring technology, set up at exhaust pipe height
on the side of the road.
A series of UV and IR light paths directed across the road
quickly and accurately measure levels of CO, CO2, NOx, HC
and particulate (expressed as “smoke factor”). The vehicles’
speed and rate of acceleration is also measured, and a
photograph, clearly showing the number plate of each
vehicle, is taken.
A cost-effective way
The Accuscan system is capable of measuring the individual to monitor vehicle
emissions of each and every vehicle that drives through an
emissions
invisible monitoring path, thereby building up a detailed and
comprehensive database which can be used for a number of We offer fleet characterisation
applications, including: studies to those local authorities
• Fleet characterisation. looking to monitor areas that
attract heavy traffic or major
• Identification of high polluting vehicles (Gross Emitters). commuter routes into and out of
• Clean screening programmes. parts of the towns or cities where
• Air quality forecasting. it has been difficult to reduce air
pollution.
• Local air quality management action plans.
Our tailored short to medium
Although some clients may choose to purchase the
term vehicle emissions
equipment outright, many local authorities have seen direct
monitoring studies, which we
cost benefits through commissioning a bespoke ET vehicle are able to offer customers on
emissions study. an operated rental basis, include:
• A pre-study consultation,
fact-finding and objective
review meeting.
• Provision of a van, a remote
sensing vehicle emissions
monitoring system and
operators.
• A monitoring programme.
• Supply of data.
• An optional consultant’s
report and expert analysis.
Our cost-effective studies can be
implemented over a two-week or
four-week programme. Longer
term and repeat programmes are
also available.

3. CASE STUDIES
ET works with local authorities across the country to provide fast and highly accurate data.
Our wide-ranging experience makes us a one-stop shop for service, advice and equipment.
London South Yorkshire
Emissions from as many as 4,000 vehicles an A county-wide survey of air quality
hour were recorded using ET's Accuscan 4600 monitoring sites provided authorities in
technology during a seven-hour session on South Yorkshire with vital information
London's Tower Bridge, ahead of the about vehicle use on their busiest routes.
implementation of the city's Low Emissions ET carried out the fleet characterisation
Zone. The Accuscan works by measuring study at sites across Sheffield, Doncaster
tailpipe emissions as vehicles pass through and Rotherham at the request of the South
ultraviolet and infrared beams situated on Yorkshire Passenger Transport Executive
either side of the road – as a camera records and the four local authorities in the region.
the number plate. Officials from London
Using our cutting edge technology, we
borough councils were impressed by the
were able to identify the most polluting
installation speed of the rugged, remote
vehicles on eight roads where national air
sensing device. Nitrogen oxides, carbon
quality objectives were being breached.
monoxide, carbon dioxide and hydrocarbon
levels were measured.
Bristol Devon
As part of its environmental health strategy, A £20,000 DEFRA grant enabled five local
Bristol City Council announced a month-long authorities in Devon to undertake a two-part
fleet characterisation survey across seven study into vehicle emissions using ET's
heavy traffic sites in the city. All were major advanced Accuscan 4600 equipment. The five
commuting routes in which it had previously authorities – Torbay, Teignmouth, South
proved very difficult to reduce air pollution. Hams, Mid-Devon and Plymouth – all have
The city council was keen to quantify the air quality management areas with high traffic
percentage of high polluting vehicles in those flows. The study has provided a detailed
areas to help manage future air quality. The assessment of pollution in those locations
data also supported an initiative to educate from specific vehicle types including HGVs,
drivers on the importance of having their buses and commercial vehicles. The survey
vehicles regularly serviced. data is proving crucial in developing traffic
management policies and educating the
owners of unregulated vehicles, such as small
delivery vans, about their emission levels.

4. Vehicle Emissions Monitoring Services
CO2 plume greater than 20%-cm CO2 plume less than 20%-cm
Static background conditions and mean value Static background conditions and mean value
CO% / CO2% ±0.007 or ±10% of reading, whichever is greater CO% / CO2% ±0.015 or ±15% of reading, whichever is greater
HC ppm / CO2% ±6.6 or ±10% of reading, whichever is greater HC ppm / CO2% ±10 or ±15% of reading, whichever is greater
NO ppm / CO2% ±10 or ±10% of reading, whichever is greater NO ppm / CO2% ±10 or ±15% of reading, whichever is greater
CO% ±0.1 or ±10% of reading, whichever is greater CO% ±0.15 or ±15% of reading, whichever is greater
HC (propane) ppm ±100 or ±10% of reading, whichever is greater HC (propane) ppm ±150 or ±15% of reading, whichever is greater
NO ppm ±150 or ±10% of reading, whichever is greater NO ppm ±225 or ±15% of reading, whichever is greater
Smoke number* ±0.05 or ±10% of reading, whichever is greater Smoke number*† ±0.1 or ±15% of reading, whichever is greater
*Units are ~ grams diesel particulate per 100 grams fuel *Units are ~ grams diesel particulate per 100 grams fuel
†Preliminary evaluation which assumes an arbitrary particle size distribution
Monitoring
for Life
Enviro Technology Services plc
Advanced Environmental Systems - Sales, Hire and Services
Kingfisher Business Park, London Road, Stroud, Gloucestershire, GL5 2BY.
Tel: +44 (0)1453 733200 Fax: +44 (0)1453 733201 Email: info@et.co.uk
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